Will Root prevent OTA's? - Samsung Galaxy Nexus

I thought I read that it will prevent them.
Or is it just a custom recovery (CWM) that will prevent them?
I just wanted to make sure I get 4.2 on day one one is released.

That is one of the greatest mysteries of the Common Era, especially since there at least 50 past threads on this subject, and yet it is impossible to find an answer (apparently)...
BTW - you do realize that with a rooted phone and custom recovery you can actually flash what the hell you like, and don't have to wait for someone to push it to you...?

Yes, I realize that you can flash broken or preview builds of new releases...or nightlies with broken features.
I'm interested in stable builds only.
That's why I'm asking.

With the Galaxy Nexus, the dev teams usually have the OTA available to flash within a day of it hitting. You will typically get it from devs before your device will let you OTA.
Root users (especially on nexus devices) always get it first!
Another good thing about Nexus is that its gonna be a stable release.

Rooting doesn't prevent OTAs. Now a custom recovery on the other hand will stop automatic install but it will still download and try.

Root itself doesn't stop an OTA. Custom recovery, different radios, and changed/modified/removed system apps/files do.

Ruggerxpunk said:
I thought I read that it will prevent them.
Or is it just a custom recovery (CWM) that will prevent them?
I just wanted to make sure I get 4.2 on day one one is released.
Click to expand...
Click to collapse
I also agree that it's CWM that prevents the OTA update from being written to your Nexus. Yesterday I was in the same situation as you (unlocked bootloader and rooted) with stock Jelly Bean 4.1.1. I downloaded the new 4.1.2 file from google and followed these excellent instructions:
(had to remove link....not enough posts...go figure)
The mistake I made yesterday, even though I had an existing BU made by Titatium Pro, I didn't copy that BU to my PC so I didn't get my apps data updated (messed up a game, email configuration, groove ip, google voice)....learned on that one:>)

martonikaj said:
Root itself doesn't stop an OTA. Custom recovery, different radios, and changed/modified/removed system apps/files do.
Click to expand...
Click to collapse
This.
If you root and remove system apks like Google plus or currents, any ota update will fail to install, even on stock recovery with locked boot loader.
Sent from my Galaxy Nexus using xda premium

More accurately, it's the update script that stops the install of OTA's.
OTA's are typically a patched update, rather than a full update (meaning they only update parts of the OS). The OTA's are typically designed and tested to update X to Y, and are not designed for U, V or W to Y. In order to make sure that the update is actually updating X, and not U, V or W, the install script makes certain hash tab type checks on items such as Recovery, specific system apps, and even the Bootloader. Files that get added to the system, such as su and SuperSu, busybox, etc, are not typically checked for their presence during the install process.
Not every OTA is the same, and not not every install script is the same. Past experience shows that Recovery, system apps, and sometimes Bootloader need to be un-modified for the script to pass its checks and balances, but there's no guarantee that this will be the case for the next update. On the Nexus One, it threw everyone for a loop when the updates started checking the Bootloader for the first time, especially since a lot of people were deliberately trying to avoid updating to a particularly restrictive Bootloader (which was probably restrictive for a reason, hence the check to make sure it was being used). I used to modify the updates to remove certain checks; when I wanted to use an alternate Recovery for example. Removing the checks would allow the update to install, regardless of the changes - of course, you had to know the risks.
The real answer is that you never know what an update is going to check, and hence you will never know what will make it fail.
I recommend pulling apart an update to see what it is doing, and then there will be less guesswork and speculation...
No offence to adrynalyne, martonikaj, etc - who I know know their shizzle

Well, I was speaking more on behalf of the updater function rebooting but not able to get a 3rd party recovery to actually install the update package; I am guessing because the command it sends to recovery is invalid for the custom recovery. But you can reboot to the custom recovery and manually install it.
I've never investigated past that.
And definitely no offense taken. I am always open for being corrected or learning new things

adrynalyne said:
I am guessing because the command it sends to recovery is invalid for the custom recovery. But you can reboot to the custom recovery and manually install it.
Click to expand...
Click to collapse
I'm glad you mentioned that. A lot of people either assume or are given the impression that a custom recovery actually prevents an OTA update, when it really just prevents the update from happening automatically. It's an important distinction to someone who wants to learn and understand the process. I've seen people flash back to stock recovery so they could get an OTA update, then flash back to their custom recovery... instead of just booting into their custom recovery and choosing the update zip.

phazerorg said:
I'm glad you mentioned that. A lot of people either assume or are given the impression that a custom recovery actually prevents an OTA update, when it really just prevents the update from happening automatically. It's an important distinction to someone who wants to learn and understand the process. I've seen people flash back to stock recovery so they could get an OTA update, then flash back to their custom recovery... instead of just booting into their custom recovery and choosing the update zip.
Click to expand...
Click to collapse
+1
Another important distinction.

danger-rat said:
+1
Another important distinction.
Click to expand...
Click to collapse
Great info in this thread....thanks to all!

I can cofirm receiving OTAs on rooted devices (not the GNex though), and the only issue I ran into was frozen apps. As long as I unfroze them before flashing, and had the stock recovery. I had not issue (LG Ally and Asus TF201)

Related

Android update!

Disclaimer: This worked on my phone. I am not responsible if your phone turns into an expensive brick.
I know this isn't quite the update everyone was waiting for I managed to pull the 2.3.6 OTA files. I also managed to figure out how to flash them. Turns out CWM 5 offers root adb access, everything we need to update and root this phone. Note I tried CWM 6 but it said "possible loss of root" so apparently CWM 6 likes to reside on an already rooted phone.
Note this is not the most elegant solution. The most elegant would be a signed update.zip. The second most elegant would be something flashable with CWM or Odin. Too bad I don't know how to do those. I do know how to do this.
The first thing to do is make sure you are on the AT&T stock firmware. It doesn't matter if you've already flashed something else. No need to wipe cache or factory reset or anything (although if you run into problems you should try to do that step). Download it from samfirmware.com. Flash it with Odin. This will put you on stock 2.3.5. Even if you were already on 2.3.6, or rooted, or on Rogers, this will work. After the flash, boot the phone normally, wait a minute or so, and shut it down.
Now for the fun part. AT&T will not push the OTA to a non AT&T customer. The flash will also not work with a modified phone (hence the reflash to stock). How to gain root access to manually flash the OTA? If we install root, it will not install. If we install CWM, we will not have the stock recovery which is required to process the OTA. So...
How about this? We install CWM 5. You can find it here http://forum.xda-developers.com/showthread.php?t=1458153
Then we adb into the phone, and push the OTA files, and then reflash the stock recovery over CWM, and then manually reboot into OTA mode. That sounds crazy... crazy enough to work.
After you've flashed CWM, reboot into it and make sure your phone is still connected to your computer. We won't actually be using CWM, just the root access it provides over adb. Unzip the two zip files below (why use external hosting, I can store zips up to 11 MB on here) into a folder and run fota.bat. Ooo and ahh over your Gingerbread.
But what about root? Well, I posted in another thread a complicated method for rooting 2.3.6 using the root access from CWM, but how about easy? Boot your phone into 2.3.6 and let it sit for a minute or so, and shut it down. Reboot into Odin mode, and reflash CWM over the stock recovery (again). Copy the Superuser zip from the folder you made earlier to your SD card. Flash this with CWM. This is the beta of Superuser 3.2, courtesy of Rom Manager. Download the stericson busybox app from the Market if you want busybox as well.
This was a fun way to kill a weekend
Throws a signature verification failed error.
Try again with the new method
Had a few mild scares. After flashing CWM on stock, it refused to boot into it but after 3 tries and my screen acting up upon boot, it finally booted into CWM. Launched the bat file and it went well. Upon booting up and entering the update process, it froze up at 74% and refused to continue. Rebooted the phone and it once again entered the update process and this time it managed to finish. Phone rebooted and after checking "About phone", my phone is on 2.3.6 stock. When you initially provided the OTA files and the sig check failed, I had a good feeling this would be the only other way to do it as I tried to sign it and it also failed. Thanks for taking the time to post all of this.
Why go to 2.3.6? It´s better than 2.3.5 customized?
Better question: we're getting ICS within the month, so why bother with 2.3.6 when you can just upgrade to 4.x.x when it comes down?
-Ara
AraDreamer said:
Better question: we're getting ICS within the month, so why bother with 2.3.6 when you can just upgrade to 4.x.x when it comes down?
-Ara
Click to expand...
Click to collapse
Because there are some people who will want to stick with 2.3.5/6 . He made this so that those who do, can update to 2.3.6 even when they aren't with AT&T, almost hassle free.
narume said:
Had a few mild scares. After flashing CWM on stock, it refused to boot into it but after 3 tries and my screen acting up upon boot, it finally booted into CWM. Launched the bat file and it went well. Upon booting up and entering the update process, it froze up at 74% and refused to continue. Rebooted the phone and it once again entered the update process and this time it managed to finish. Phone rebooted and after checking "About phone", my phone is on 2.3.6 stock. When you initially provided the OTA files and the sig check failed, I had a good feeling this would be the only other way to do it as I tried to sign it and it also failed. Thanks for taking the time to post all of this.
Click to expand...
Click to collapse
When I was testing this, I saw that behavior if you didn't completely boot up the phone between steps (ie, flash stock firmware, boot phone, flash CWM, boot phone). I don't know what would cause it otherwise. Glad to see your phone made it.
narume said:
Because there are some people who will want to stick with 2.3.5/6 . He made this so that those who do, can update to 2.3.6 even when they aren't with AT&T, almost hassle free.
Click to expand...
Click to collapse
Actually I did it because I've owned this phone for exactly two weeks and discovered all the available ROMs are based on 2.3.5 even though 2.3.6 has been out since December. CWMR with root has been out since January, and since then nobody else has rooted 2.3.6 or found a way to flash it. And I thought, it couldn't be that hard? And even more amazed when I discovered CWMR comes with root out of the box, without even touching /system. The only other missing piece was the stock recovery, which also wasn't out in the wild. 3 birds for one stone
On a side note, if you want to do some cleaning after the OTA and you decide to root, you can delete /cache/fota and /data/fota safely.
Nardholio said:
Actually I did it because I've owned this phone for exactly two weeks and discovered all the available ROMs are based on 2.3.5 even though 2.3.6 has been out since December. CWMR with root has been out since January, and since then nobody else has rooted 2.3.6 or found a way to flash it. And I thought, it couldn't be that hard? And even more amazed when I discovered CWMR comes with root out of the box, without even touching /system. The only other missing piece was the stock recovery, which also wasn't out in the wild. 3 birds for one stone
On a side note, if you want to do some cleaning after the OTA and you decide to root, you can delete /cache/fota and /data/fota safely.
Click to expand...
Click to collapse
Ah, I see. Well, still, being able to flash to 2.3.6 is nice because if anyone ever decides to stick with 2.3.6 they can easily flash the update now. Maybe more people like you will pop up and start pushing out more useful content like this for the Glide so it won't be a dead area of development anymore.

[Q] How to get back to Stock ?

Just recently purchased an almost new Nexus that was originally purchased from Google.
Just got the notification that there was an update avail, 4.1.2 but it failed with an error and I see CWM listed.
How can I remove ClockWorkMod and get back to stock android?
Thanks
If you really are running stock 4.1.1 but with CWM (I highly doubt that), then yes flashing stock recovery would let that OTA install.
The reason why I say that's unlikely is that the only reason someone would flash CWM and have it on the device is to use it as a way to modify the device further. I highly doubt that the phone is 100% stock other than recovery. Other things are likely modified that would cause the OTA to fail even if you had a stock recovery on it.
Considering you bought the phone used and it's been modified by the previous owner, I'd 100% flash it back to stock with Google factory images. I would never trust a previous owner's firmware that they flashed. If they were "smart" enough to mess around with it, then they're likely "dumb" enough to put something on there you don't want.
http://forum.xda-developers.com/showthread.php?t=1626895
martonikaj said:
If you really are running stock 4.1.1 but with CWM (I highly doubt that), then yes flashing stock recovery would let that OTA install.
The reason why I say that's unlikely is that the only reason someone would flash CWM and have it on the device is to use it as a way to modify the device further. I highly doubt that the phone is 100% stock other than recovery. Other things are likely modified that would cause the OTA to fail even if you had a stock recovery on it.
Considering you bought the phone used and it's been modified by the previous owner, I'd 100% flash it back to stock with Google factory images. I would never trust a previous owner's firmware that they flashed. If they were "smart" enough to mess around with it, then they're likely "dumb" enough to put something on there you don't want.
http://forum.xda-developers.com/showthread.php?t=1626895
Click to expand...
Click to collapse
Thank you very much for the link. I'll have to make sure I don't loose anything since it's my wife's phone. I should have looked more closely when the install bombed out but I saw CWM and there was the typical list of things that you have to increment thru to get to what you want to install. Maybe the big system in the sky will try to do another OTA update before I get around to reinstalling.
All stock but cannot update
martonikaj said:
Other things are likely modified that would cause the OTA to fail even if you had a stock recovery on it.
Click to expand...
Click to collapse
What else can cause it to fail? I was originally on the samsung version of yakju, but I flashed takju (4.0.2) following instructions from XDA. I have everything stock, but I am unlocked and rooted, and my system has updated OTA all the way till 4.1.1. Whenever I get the "Update to 4.1.2" thing, though, I restart and install.
I see:
Android standing with a spinning blue-edged thing (Installing)
The blue bar at the bottom reaches about 1/4 to 1/3 of the way to the end
Android is on its back with an exclamation mark above (Recovery)
Trying to use the menu just lets me restart, install from ADB or USB, revert to factory settings, or wipe cache
Not doing anything causes it to reboot back into 4.1.1
I've looked around, and I couldn't find anyone with the same problem. (It's usually having CWM installed etc.)
Not sure if this is the right place to post it. Should I make a new thread?
Note: I have no access to computers right now. My laptop charger short-circuited and started a small fire. I have a new one ordered, which should arrive sometime these two weeks.
masasin said:
What else can cause it to fail? I was originally on the samsung version of yakju, but I flashed takju (4.0.2) following instructions from XDA. I have everything stock, but I am unlocked and rooted, and my system has updated OTA all the way till 4.1.1. Whenever I get the "Update to 4.1.2" thing, though, I restart and install.
I see:
Android standing with a spinning blue-edged thing (Installing)
The blue bar at the bottom reaches about 1/4 to 1/3 of the way to the end
Android is on its back with an exclamation mark above (Recovery)
Trying to use the menu just lets me restart, install from ADB or USB, revert to factory settings, or wipe cache
Not doing anything causes it to reboot back into 4.1.1
I've looked around, and I couldn't find anyone with the same problem. (It's usually having CWM installed etc.)
Not sure if this is the right place to post it. Should I make a new thread?
Note: I have no access to computers right now. My laptop charger short-circuited and started a small fire. I have a new one ordered, which should arrive sometime these two weeks.
Click to expand...
Click to collapse
2nd post of this thread
http://forum.xda-developers.com/showthread.php?t=1419170
Read it. Part of it is true for official (directly from gservers to the device) updates. If you want, you can then update yourself (read also 1st post) like instructed or put it like it needs to be and use normal update from within android again.
Read the stickies people, before pressing the "new thread/reply to" button.
Sent from my i9250

[Q] CyanogenMod not getiing installed. SuperSU Crashing.

Hello All,
I am a beginner to all this stuff. I wanted to root my phone after seeing OnePlus One running on CyanogenMod. So, first I tried to directly install the Mod using the softwares downloaded from Cyanogen's website. But the software gave the error "Unsupported Firmware". Then I researched a bit on manually installing the mod. I followed the instructions.
- First I rooted my phone with Odin 3.09v
- Installed ROM Manger on my phone (Meanwhile the SuperSU app kept on crashing)
- Somehow I managed to install ClockworkMod (What I did was downloaded SuperSU apk, installed it again. It started working and then, not losing the chance I installed ClockworkMod).
- Then I tried to install CyanogenMod through ROM Manager
- My phone re-booted and then gave a error "Can't install package on incompatible data".
- I'm having the latest snapshot version on CyanogenMod.
- Then I left the things as it is. No rooting, unrooting, etc.
- So, now I tried to take backup of my current ROM, in case something happens at least I'll be having something with me to recover
- I used ROM Manager to take backup. But it gave the error "Can't create the image"
So, now I'm stuck between middle of nowhere. Please help me out to reach to some point.
svikramajit said:
Hello All,
I am a beginner to all this stuff. I wanted to root my phone after seeing OnePlus One running on CyanogenMod. So, first I tried to directly install the Mod using the softwares downloaded from Cyanogen's website. But the software gave the error "Unsupported Firmware". Then I researched a bit on manually installing the mod. I followed the instructions.
- First I rooted my phone with Odin 3.09v
- Installed ROM Manger on my phone (Meanwhile the SuperSU app kept on crashing)
- Somehow I managed to install ClockworkMod (What I did was downloaded SuperSU apk, installed it again. It started working and then, not losing the chance I installed ClockworkMod).
- Then I tried to install CyanogenMod through ROM Manager
- My phone re-booted and then gave a error "Can't install package on incompatible data".
- I'm having the latest snapshot version on CyanogenMod.
- Then I left the things as it is. No rooting, unrooting, etc.
- So, now I tried to take backup of my current ROM, in case something happens at least I'll be having something with me to recover
- I used ROM Manager to take backup. But it gave the error "Can't create the image"
So, now I'm stuck between middle of nowhere. Please help me out to reach to some point.
Click to expand...
Click to collapse
Ok, first I think your SuperSu is not working properly. Open the Supersu app to see if it needs to update binaries. If it continues to crash, go into recovery manually (not using rom manager) and flash the latest SuperSu. Wipe Cache, go to advanced and Wipe Dalvik. Reboot. Your phone will say "android is upgrading" for a bit. Once it's booted up, go back into the supersu app and see if it needs to update binaries, if so- let it update, if not- move on. Here's a link to download SuperSu 2.02
Go back into recovery manually and select backup and restore-> backup to sdcard (or sdcard1, external sd, is my preference) This will start the backup process.
Once that is done, you need to find the CyanogenMod file specific to your phone, then you can enter recovery and flash it.
If you have trouble entering recovery, you can flash a new one via recovery or with odin.
Hello absinthesummer,
I followed every instruction you told. Now I'm done till creating backup. The problem now I'm facing is this 'Status 7' error. It says "Can't install package on incompatible data.....". Now what to do?
Status 7 is a very specific error. It means your recovery is out of date. Get the absolute newest you can find and try again. This is good news though, you've got progress!
---------- Post added at 11:48 AM ---------- Previous post was at 11:46 AM ----------
Edit: flash the latest recovery you can find via Odin. You probably won't be able to do it in recovery while you're getting the status 7 error.
absinthesummer said:
Status 7 is a very specific error. It means your recovery is out of date. Get the absolute newest you can find and try again. This is good news though, you've got progress!
---------- Post added at 11:48 AM ---------- Previous post was at 11:46 AM ----------
Edit: flash the latest recovery you can find via Odin. You probably won't be able to do it in recovery while you're getting the status 7 error.
Click to expand...
Click to collapse
No, I've got the latest recovery. But I figured out the problem. It was with the package I downloaded. The CM 11 M9 version was giving errors. I researched and tried few fixes, but still it didn't work.
The fixes I tried :-
1. Deleting some coding lines from the updater-script file. But this fix gave the status 6 error.
2. Changing the updater-script file format to UNIX format. Then again it gave the status 7 error.
So, what I did, when I had no more brain to fix it, I downloaded the CM 11 M6 version and tried installing it. And VOILA! It worked. Then I updated it to M9 version through phone. Now it's working. Though it has some bugs. And some features are missing too that I wanted badly.
svikramajit said:
No, I've got the latest recovery. But I figured out the problem. It was with the package I downloaded. The CM 11 M9 version was giving errors. I researched and tried few fixes, but still it didn't work.
The fixes I tried :-
1. Deleting some coding lines from the updater-script file. But this fix gave the status 6 error.
2. Changing the updater-script file format to UNIX format. Then again it gave the status 7 error.
So, what I did, when I had no more brain to fix it, I downloaded the CM 11 M6 version and tried installing it. And VOILA! It worked. Then I updated it to M9 version through phone. Now it's working. Though it has some bugs. And some features are missing too that I wanted badly.
Click to expand...
Click to collapse
Awesome! I'm glad you got it working. You can also try comparing the two files to see what's different, or maybe swap the updater script. Maybe you'll be able to get the one you wanted working with a little modification
absinthesummer said:
Awesome! I'm glad you got it working. You can also try comparing the two files to see what's different, or maybe swap the updater script. Maybe you'll be able to get the one you wanted working with a little modification
Click to expand...
Click to collapse
Thanks to you. You too helped me in working it out!
But, I have some more questions
Question 1 : If I flash stock ROM on my rooted phone, will I receive the new updates? If yes, will I be able to install them via Kies on my phone without getting into any trouble?
Question 2 : If I install stock ROM of any other phone, say Galaxy S5, will it work on my phone properly without any problems? If yes, will I receive the updates for that too and able to install them via Kies? If no, is there any way to install it? Cause I have seen people using S5 ROM on Note 2.
First question the answer is yes. As long as you have the stock recovery and stock kernel (along with the stock rom) you will receive ota updates. You can use ota root keeper (an app) to keep root during an ota update. There are many people who choose to stay fully stock but root to get rid of bloatware & stuff. However, if you want to get ota, I recommend freezing the bloatware instead of uninstalling, because an ota usually replaces old bloatware with new bloatware and can sometimes abort the ota if those apps are missing... but keep on mind this is not always the case, only certain devices.
Second question, no you cannot. Roms from other devices have to be ported to be compatible. But if you look in the development forums, you can find many roms that are basically stock but have specific features from other roms, along with the system ui (ie S5, note 3, & so forth). These rom devs have ported either parts/features or full on roms to be compatible on our device. They are excellent! I recommend reading up them and if you see some you like, try them out!
absinthesummer said:
First question the answer is yes. As long as you have the stock recovery and stock kernel (along with the stock rom) you will receive ota updates. You can use ota root keeper (an app) to keep root during an ota update. There are many people who choose to stay fully stock but root to get rid of bloatware & stuff. However, if you want to get ota, I recommend freezing the bloatware instead of uninstalling, because an ota usually replaces old bloatware with new bloatware and can sometimes abort the ota if those apps are missing... but keep on mind this is not always the case, only certain devices.
Second question, no you cannot. Roms from other devices have to be ported to be compatible. But if you look in the development forums, you can find many roms that are basically stock but have specific features from other roms, along with the system ui (ie S5, note 3, & so forth). These rom devs have ported either parts/features or full on roms to be compatible on our device. They are excellent! I recommend reading up them and if you see some you like, try them out!
Click to expand...
Click to collapse
- Stock Recovery
- Stock Kernel
- OTA Root Keeper
- Bloatware
Well, to be honest, just right now I learned these new terms but know nothing about them. Can you please give me a brief description for these four terms so that when I do advanced search on them, I'd have a idea in my mind about what these are. It will make it easy for me to understand the advance things.
And I'm looking for S5 ROM for my phone. Let's see what I get.
One more question. I made a backup of my rooted stock ROM via latest ClockwordMod, manually. Now, if I reset the binary counter using Triangle Away and then wipe Cache and Dalvik and then flash my stock ROM which is located on my memory card and then after flashing I use SuperSU to unroot and then a factory reset (I don't know the method of factory reseting cause I'm confused. Whether to do it manually, like going into recovery mode or just from the phone settings. So please tell me this also.), will my phone be unrooted totally?
And sorry for bugging you so much. I hate to do that, but I don't want to take risk with my phone. So I am just collecting information. I hope so many queries are not a problem for you.
Ok...
You already know what a rom is. A kernel is a lower-level base. It controls the hardware. So when you do something on the interface, in the rom, it tells the hardware how to react. (Ie if you're playing music it tells which speakers to play and how loudly). The kernel controls almost everything you can't see, it relates to performance. Most stock kernels can be limiting as they underclock the cpu by a certain percentage. Because of this, people seek out custom kernels to max out their device's potential. Louder speakers, faster cpu, better graphics, etc. This is all stuff the kernel can optimize... but because you can change so many factors there is a risk of instability if you push your device too hard (max performance) or limit it too much (max battery saving).
Recovery is exactly what it sounds like. When you boot your device the very first screen that pops up is the bootloader. It's giving you time to boot in 3 different modes. The first mode, by doing nothing, is a normal boot into the rom/OS. The second mode, which you get to by one button combination, takes you to recovery. The stock recovery is very limited. It gives you the option to factory restore, wipe cache, update, or boot normally. Stock recovery only exists for emergencies, if your phone fails to boot normally. We have custom recoveries so we can do more stuff, flash custom roms and tinker with things. The third mode is download mode/Odin mode. This is the bootloader interface itself. It's the last resort for recovery if your recovery has been damaged or corrupted. It allows you to connect to Odin or kies and perform an emergency recovery of the device. If you damage your bootloader, your device is completely bricked.
So the order of operation is this:
Lowest level- bootloader
Second level- recovery
Third level- kernel
Fourth level- rom
Bloatware is all the pre-installed apps that your carrier adds to your phone. Most people don't use it, don't like it, and don't want it. That why we root. Without root we basically are just guest users of the device. With root we become the administrators of the device. Until you root, your carrier has admin rights over your phone (to use windows terms).
When you receive an ota update, your carrier can make it to where the update won't proceed if their pre-installed apps have been removed (although this isn't always the case). Additionally, the update package itself checks the integrity of the device. It checks recovery, kernel, and rom. If any have been altered, it will not proceed because it could cause conflict and potentially brick your device. That's why those things have to be stock.
Ota root keeper is simply an app that backs up your superuser rights before an update and restores them after its done.
You should be able to find plenty of roms with S5 features. I'm using one that makes my device fully like an S5 (my device even thinks it is an S5 and every app identifies it as such) I can think of at least 2 others as well. There's plenty to choose from, and if you see a rom you like but it's mudding a particular feature, you can probably find that feature as a stand-alone installation in the forum's themes & apps section. Just about every feature of S5, S4, and note 3 has been ported to this device, so look around!
Also, for future reference, if someone helps you on the forum, hit the thanks button instead of saying it. I don't mind either way, but some people get annoyed and will stop helping them if they don't hit that button lol. It's silly, but it's part of "forum decorum"
---------- Post added at 12:54 AM ---------- Previous post was at 12:44 AM ----------
svikramajit said:
One more question. I made a backup of my rooted stock ROM via latest ClockwordMod, manually. Now, if I reset the binary counter using Triangle Away and then wipe Cache and Dalvik and then flash my stock ROM which is located on my memory card and then after flashing I use SuperSU to unroot and then a factory reset (I don't know the method of factory reseting cause I'm confused. Whether to do it manually, like going into recovery mode or just from the phone settings. So please tell me this also.), will my phone be unrooted totally?
And sorry for bugging you so much. I hate to do that, but I don't want to take risk with my phone. So I am just collecting information. I hope so many queries are not a problem for you.
Click to expand...
Click to collapse
You're fine, I don't mind answering your questions. Yes, you can unroot fully in the way you just mentioned but you don't even have to go through all the trouble of factory reset. Just unroot in the app. The app can be uninstalled afterwards via the play store.
You can factory reset either way, the same commands are given no matter which way you go about it. But it can be more efficient to do it from recovery because when you do it from the rom it has to create a wipe script for when it reboots, and it has to shut down the rom first. If you do it from recovery it doesn't have to anything, the rom isn't running and it can execute the wipe command immediately. (The wipe command is wipe /data /cache etc)
Thanks again for all that great info!
Questions : Is there no way to fix the Bootloader if it gets damaged by chance? And which S5 ROM are you using?
svikramajit said:
Thanks again for all that great info!
Questions : Is there no way to fix the Bootloader if it gets damaged by chance? And which S5 ROM are you using?
Click to expand...
Click to collapse
If you damage the bootloader it's a hard brick and you would have to send it in for jtag services (this is a low level emmc chip flash service) The bootloader won't get damaged unless you do something to corrupt it. If you ever feel the need to flash a new bootloader, do it via Odin, never recovery! If you remember that you should be fine.
svikramajit said:
Thanks again for all that great info!
Questions : Is there no way to fix the Bootloader if it gets damaged by chance? And which S5 ROM are you using?
Click to expand...
Click to collapse
I meant to tell you I'm using DN3 rom. It has an aroma installer that lets you choose whether you want an S5 ui, a note 3 ui or a mixed ui. Choosing S5 ui & S5 build prop allows your device to work with S5 apps & it looks just like an S5. It's not the only rom out there, but it's beautiful, fast, and stable & the team works hard on it.
absinthesummer said:
I meant to tell you I'm using DN3 rom. It has an aroma installer that lets you choose whether you want an S5 ui, a note 3 ui or a mixed ui. Choosing S5 ui & S5 build prop allows your device to work with S5 apps & it looks just like an S5. It's not the only rom out there, but it's beautiful, fast, and stable & the team works hard on it.
Click to expand...
Click to collapse
Hey absinthesummer!
I tried to unroot my phone with the method I told you. But in the restore option, I am stuck at 'Checking MD5 Sums..'. What to do now?
MD5 checking takes forever! You have to wait it out. Most recoveries offer a way to turn it off. You shouldn't have to factory reset though, just click unroot in the super su app and then uninstall the app from the play store.
absinthesummer said:
MD5 checking takes forever! You have to wait it out. Most recoveries offer a way to turn it off. You shouldn't have to factory reset though, just click unroot in the super su app and then uninstall the app from the play store.
Click to expand...
Click to collapse
I waited and the system was restored. But I got an error on 'Restoring Data'. I rebooted the phone and now it's showing glowing Samsung logo from like 3-4 minutes.
I've seen that before. Can you get back into recovery? You may have to flash stock in Odin, flash recovery and then do the Restore again. Data got messed up.
absinthesummer said:
I've seen that before. Can you get back into recovery? You may have to flash stock in Odin, flash recovery and then do the Restore again. Data got messed up.
Click to expand...
Click to collapse
I'll try removing the battery now. Let's see what happens.
Ok if you can get into recovery, do a fresh flash and then try to restore again. And see if it offers a way to turn off MD5 checking. That's why I use philz or twrp, they offer that and move much faster through MD5 check by default.
---------- Post added at 11:13 AM ---------- Previous post was at 11:12 AM ----------
If you still fail on data, flash stock in Odin, flash custom recovery, then you should be able to enter recovery and have a successful restore.

Nvidia Experience 5.2 ROM

I have not been able to update my shield tv 2015 16gb device to 5.2.
The device is rooted with latest 3.1.1 TWRP recovery. Each time I select upgrade with the stock settings it will reboot into recovery and won't update.
Does anyone have a link to the latest ROM or know where Nvidia stores the OTA file? I would rather flash the image my self if I can find get the ROM.
I'm sure this we'll help a few other people I can't be the only one with this issue. Need the 5.2 image not the 5.0.2 which is the previous version of Shield experience update.
you should not flash TWRP to your device reflash original recovery and remove su then try update again
BTDTGTTS Simply unrooting, and replacing TWRP with a Stock Recovery. Will not sadly be enough. The only way out is to Factory Reset. Which, in my case (Pro Owner), means a Two Hours of down time. While the Shield is busy away at nuking the /data Partition. Only after that will you be fully unrooted. Of course if you are using TWRP as your Recovery, you WILL have to replace it with a Stock Recovery for your Update to work.
It's a real PItA for just some extra (Non-working) Plex Channels, and making the needed edits to settings.db to prevent it from kicking iPlayer off after each Power Cycle / IP Address reset. (Though that last one... Has more legs on it then just the Plex Channels.)
Ichijoe said:
BTDTGTTS Simply unrooting, and replacing TWRP with a Stock Recovery. Will not sadly be enough. The only way out is to Factory Reset. Which, in my case (Pro Owner), means a Two Hours of down time. While the Shield is busy away at nuking the /data Partition. Only after that will you be fully unrooted. Of course if you are using TWRP as your Recovery, you WILL have to replace it with a Stock Recovery for your Update to work.
.)
Click to expand...
Click to collapse
i didnt know that :good:
but if he has TWRP installed couldnt he format data pation from TWRP thus saving hours of thumb twiddling
Ichijoe said:
BTDTGTTS Simply unrooting, and replacing TWRP with a Stock Recovery. Will not sadly be enough. The only way out is to Factory Reset. Which, in my case (Pro Owner), means a Two Hours of down time. While the Shield is busy away at nuking the /data Partition. Only after that will you be fully unrooted. Of course if you are using TWRP as your Recovery, you WILL have to replace it with a Stock Recovery for your Update to work.
It's a real PItA for just some extra (Non-working) Plex Channels, and making the needed edits to settings.db to prevent it from kicking iPlayer off after each Power Cycle / IP Address reset. (Though that last one... Has more legs on it then just the Plex Channels.)
Click to expand...
Click to collapse
Obviously thats a much longer and worse route.
afgok said:
you should not flash TWRP to your device reflash original recovery and remove su then try update again
Click to expand...
Click to collapse
I have upgraded the shield tv many times with OTA updates. Shouldn't need to be stock just to do this. So your saying root has more restrictions....
TWRP is much better than stock recovery, now it might not be finding the OTA update when it gets pushed to recovery.
The other option I mentioned in the original post was for manually selecting the OTA image with TWRP and flashing.
Does anyone one know where the temp folder is for OTA files or a direct link online?
On another thread looks like others are having this same issue with only this version 5.2.. ill just wait for the Dev Images to show up hopefully soon.
I unrooted but still got the same issue, it wont install. But I also have another issue, i can't restore my 2015 shield 16gb by using official recovery rom and official tutorials. It consistently fails to flash system.img and vendor.img by saying that the data is too large. The only way I got my system back was by flashing this file https://forum.xda-developers.com/shield-tv/general/shield-tv-2015-ota-5-1-feb-17-zip-file-t3559062 through twrp
Diehardshorty said:
Obviously thats a much longer and worse route.
I have upgraded the shield tv many times with OTA updates. Shouldn't need to be stock just to do this. So your saying root has more restrictions....
TWRP is much better than stock recovery, now it might not be finding the OTA update when it gets pushed to recovery.
The other option I mentioned in the original post was for manually selecting the OTA image with TWRP and flashing.
Does anyone one know where the temp folder is for OTA files or a direct link online?
Click to expand...
Click to collapse
Again TWRP can not be used to flash an OTA Update. I mean sure feel free to knock yourself out. But, in the end it will fail. (Error 7 IIRC), As it is it seems that it will only work on a stock Recovery, and not on TWRP. I mean if it were this easy, everyone would be doing it. And again if the Update were working over TWRP, we wouldn't have a constant update loop. (e.g. Download Update, restart Shield, wait forever for the Shield to try (and, fail!) at applying said Update, rebooting, and wash rinse, repeat).
BTW: I never said that my way* was the 'best' way, or indeed the 'only' way. Its just the only way I know of to Nuke it from orbit all the time, everytime. And, yes it is a huge PITA. If you count a /system root as being more restrictive. In the case of Netflix making active noises about blocking rooted Devices. Then yes slowly I would say that rooting has more restrictions than stock.
*My way being to Factory wipe the Shield (Pro) which in the case of the Pro most likely means a Two plus Hours of dead time. I would assume it's much MUCH quicker for our 16GB eMMC Cousins though. But, not having One, I'm unable to confirm it.
P.s. You have also mentioned the fact that you have managed to update your rooted Shield TV on multiple occasions. Would you care to share this info with us? I for One would love to know how to do this. As having to Factory Reset the Device is a real time waster. Because after the reset, comes the rebuild. And, thats an even bigger *****.
Ichijoe said:
Again TWRP can not be used to flash an OTA Update. I mean sure feel free to knock yourself out. But, in the end it will fail. (Error 7 IIRC), As it is it seems that it will only work on a stock Recovery, and not on TWRP. I mean if it were this easy, everyone would be doing it. And again if the Update were working over TWRP, we wouldn't have a constant update loop. (e.g. Download Update, restart Shield, wait forever for the Shield to try (and, fail!) at applying said Update, rebooting, and wash rinse, repeat).
BTW: I never said that my way* was the 'best' way, or indeed the 'only' way. Its just the only way I know of to Nuke it from orbit all the time, everytime. And, yes it is a huge PITA. If you count a /system root as being more restrictive. In the case of Netflix making active noises about blocking rooted Devices. Then yes slowly I would say that rooting has more restrictions than stock.
*My way being to Factory wipe the Shield (Pro) which in the case of the Pro most likely means a Two plus Hours of dead time. I would assume it's much MUCH quicker for our 16GB eMMC Cousins though. But, not having One, I'm unable to confirm it.
P.s. You have also mentioned the fact that you have managed to update your rooted Shield TV on multiple occasions. Would you care to share this info with us? I for One would love to know how to do this. As having to Factory Reset the Device is a real time waster. Because after the reset, comes the rebuild. And, thats an even bigger *****.
Click to expand...
Click to collapse
Dirty flashing a dev image is they way I have managed to update my shield but right now the dev images are not updated, still the 5.1.0
If you're rooted, the right answer is to wait for Nvidia to release the 5.2 image.
If you absolutely need 5.2 right now for some reason, several people said that doing a factory restore worked. Just unrooting and restoring stock recovery won't do it, you need to do a full restore.
Diehardshorty said:
Dirty flashing a dev image is they way I have managed to update my shield but right now the dev images are not updated, still the 5.1.0
Click to expand...
Click to collapse
The Dev images are quite a bit different, and are also on an entirely different timeline to either the Preview, (Which I'm on), or the most current version.
But, yeah I could see how those would work. Alas mores the pitty that the rooted asspects of those Dev Images, only go as far as ADB, and not say a full /system wide root. Than again... It's probably for the best that way.
But, that doesn't really change the answer if you want / need to update (From root), than you are going to have to bite the big One, and run a Factory Reset. Which again, on the Pro, means a 2h+ reformating (zeroing out), of the /data Partition.
16gb version doesn't take as long to format but I've always remember flashing SuperSU.zip after ROM just incase. Short response for now at work.
Diehardshorty said:
The other option I mentioned in the original post was for manually selecting the OTA image with TWRP and flashing.
Does anyone one know where the temp folder is for OTA files or a direct link online?
Click to expand...
Click to collapse
Use to be here:
/data/data/com.nvidia.ota/app_download
You obviously need root to reach that folder...
If i have time i will upload later this small OTA update to MEGA.
I uploaded the 5.2 small update OTA for Shield TV 2015 (NON-PRO):
https://forum.xda-developers.com/shield-tv/general/shield-tv-2015-small-update-ota-5-2-t3621886
sammarbella said:
I uploaded the 5.2 small update OTA for Shield TV 2015 (NON-PRO):
https://forum.xda-developers.com/shield-tv/general/shield-tv-2015-small-update-ota-5-2-t3621886
Click to expand...
Click to collapse
Sweet thanks I'll give that a try from the sounds of it it might not work but I'll give a shot after work. Thanks
No luck flashing my own OTA zip I took it out of data\data\com.nvidia.ota flashed it with TWRT 3.1.1.
I might end up doing the factory restore then updating and root. Wouldn't mind a new clean OS
Diehardshorty said:
No luck flashing my own OTA zip I took it out of data\data\com.nvidia.ota flashed it with TWRT 3.1.1.
I might end up doing the factory restore then updating and root. Wouldn't mind a new clean OS
Click to expand...
Click to collapse
Check out https://forum.xda-developers.com/shield-tv/general/how-to-update-ota-5-2-2017-update-t3622540 just posted a guide on how to update
Cameron581 said:
Check out https://forum.xda-developers.com/shield-tv/general/how-to-update-ota-5-2-2017-update-t3622540 just posted a guide on how to update
Click to expand...
Click to collapse
Only difference there is that your using flashfire instead of TWRP. I can't see how that may work but worth a shot.
Diehardshorty said:
Only difference there is that your using flashfire instead of TWRP. I can't see how that may work but worth a shot.
Click to expand...
Click to collapse
Just make sure you flash the right update, and it's because the ota provided by the devs don't support ota due to device fingerprint issues along with partition finding stuff found inside the meta-inf, the reason you can't sideload the room via stock is because there is a check for modified system tables. Granted you could take out that comment and rezip it then it will fail for zip verification, after that I had tried to sign the package to regain that but then it failed due to it only signed the packages not the entire system. Long story short it's super duper picky and ChainFire made one that pleases all of the variables or ignores then.
Cameron581 said:
Just make sure you flash the right update, and it's because the ota provided by the devs don't support ota due to device fingerprint issues along with partition finding stuff found inside the meta-inf, the reason you can't sideload the room via stock is because there is a check for modified system tables. Granted you could take out that comment and rezip it then it will fail for zip verification, after that I had tried to sign the package to regain that but then it failed due to it only signed the packages not the entire system. Long story short it's super duper picky and ChainFire made one that pleases all of the variables or ignores then.
Click to expand...
Click to collapse
Ahhhhh that missing point for "error 7".
So the new app bypass that problem!
Thanks for posting it. :good:

General help with bootloader & flashing (coming from Sony phones)

Any help is greatly appreciated, I have no experience with Google phones, I was years into Sony.
I have just bought a Pixel 2 XL from a local shop in Greece, and of course, I want to root it and be able to install custom roms etc.
I have a few questions that I am searching everywhere recently and I would really appreciate if someone can make it clear to me:
1) I have read that you have to buy your phone from Google so you are able to unlock it? Can someone explain this to me? (My phone is not a specific carrier) How do I know if I am able to unlock my bootloader?
2)I have flashed roms and kernels in the past on my Sony phones, however I haven't really messed with the bootloader other than just unlocking it in the beginning. So now on the Pixel 2 XL I am reading so much about the unlock_critical vs the normal unlock, and I can admit I cannot understand the difference. Why does someone want to flash a bootloader? ( I do not understand what does "flash a bootloader" mean)
What I want to be able to do is flash custom roms, flash factory images to revert back to stock whenever I want, flash custom kernel, flash stock kernel, make a nandroid backup with twrp and restore a nandroid backup with twrp. That is all I want to be able to do without facing any errors with the bootloader,so do I need the unlock_critical ? And why?
3)If I unlock the bootloader with any of the two ways, am I able to re-lock it like nothing has happened? For example if the screen has dead pixels for some reason and I want to send it back for warranty but the bootloader is unlocked, can I lock it without it being logged? Or once unlocked, there is no going back to the warranty by re-locking? On many Sony phones we could do that.
4)If I unlock the bootloader and install TWRP I read that I will not be able to receive official updates from settings any more (OTA):
"NOTE #1: If you have mounted /system as rw at any point (like in TWRP), you must upgrade using the factory image method. OTAs will fail because they cannot verify the integrity of the disk since its verity data has been changed."
My question is, if I flash a stock image, does that get fixed? ( so if I flash 8.1.0 stock manually, will I be able to get an official update e.g. 9.0.0 from settings?)
Or if I just grab the stock boot.img of my current version of android and flash it with fastboot, then will I be able to get official updates from settings normally again?
5)Can I do the following on this order? :
Enable USB Debugging and OEM Unlocking
Unlock the bootloader (either critical or normal, whatever works)
Boot into Fastboot
Boot the twrp image from fastboot to the device
Flash the twrp zip to the phone to install TWRP
Flash the magisk zip so I root the device
Reboot and everything works? (Or do I need a custom kernel for TWRP or Magisk to work?)
Is there any issue you see with the above plan of mine?
6) Before I tweak my device in any way, is it okay if I update the device fully? So can I install any update available (OTA) and then unlock the bootloader and root etc? Or do I have to be on a specific version and not on the latest?
7)I have read something about 2 different slots on some flashing forums here, slot a and slot b, but it is not clear to me what that is. Does anyone know what that is? At which point may I face this?
Thank you very much.
A quick and not complete response to get you going
Plan 5 seems solid, unlock the bootloader to allow custom stuff. At boot you will get a warning screen to let you know.
I forgot if I only unlocked the bootloader or also the critical, try it etc.
Personally I never had to tinker with the A/B slots, within TWRP you can choose which to use.
Before Magisk, I used to flash another recovery like cwm or twrp but it is not required. You must however boot to twrp.img to flash the magisk zip.
As far as I know it is indeed the altering of the /system folder that denies future OTA (when using factory image). A manual flash (of future OTA) is easy but may require altering (removing) a switch command in the install.bat file to remove the -w (wipe).
As to the custom kernels, I never noticed the need and am running the latest v10 image with only Magisk flashed to get root.
My main goal is to get rid of ads. I use AdAway.
To get that to work in v10 you need to enable systemless host module im the Magisk manager app (reboot after).
A final feedback; when you get to sideload and need to get to recovery you may get the screen 'no command' or so; press volume-up and click power or power->click volume.
Let us know if you worked it etc!
arismelachrinos said:
Any help is greatly appreciated, I have no experience with Google phones, I was years into Sony.
I have just bought a Pixel 2 XL from a local shop in Greece, and of course, I want to root it and be able to install custom roms etc.
I have a few questions that I am searching everywhere recently and I would really appreciate if someone can make it clear to me:
1) I have read that you have to buy your phone from Google so you are able to unlock it? Can someone explain this to me? (My phone is not a specific carrier) How do I know if I am able to unlock my bootloader?
2)I have flashed roms and kernels in the past on my Sony phones, however I haven't really messed with the bootloader other than just unlocking it in the beginning. So now on the Pixel 2 XL I am reading so much about the unlock_critical vs the normal unlock, and I can admit I cannot understand the difference. Why does someone want to flash a bootloader? ( I do not understand what does "flash a bootloader" mean)
What I want to be able to do is flash custom roms, flash factory images to revert back to stock whenever I want, flash custom kernel, flash stock kernel, make a nandroid backup with twrp and restore a nandroid backup with twrp. That is all I want to be able to do without facing any errors with the bootloader,so do I need the unlock_critical ? And why?
3)If I unlock the bootloader with any of the two ways, am I able to re-lock it like nothing has happened? For example if the screen has dead pixels for some reason and I want to send it back for warranty but the bootloader is unlocked, can I lock it without it being logged? Or once unlocked, there is no going back to the warranty by re-locking? On many Sony phones we could do that.
4)If I unlock the bootloader and install TWRP I read that I will not be able to receive official updates from settings any more (OTA):
"NOTE #1: If you have mounted /system as rw at any point (like in TWRP), you must upgrade using the factory image method. OTAs will fail because they cannot verify the integrity of the disk since its verity data has been changed."
My question is, if I flash a stock image, does that get fixed? ( so if I flash 8.1.0 stock manually, will I be able to get an official update e.g. 9.0.0 from settings?)
Or if I just grab the stock boot.img of my current version of android and flash it with fastboot, then will I be able to get official updates from settings normally again?
5)Can I do the following on this order? :
Enable USB Debugging and OEM Unlocking
Unlock the bootloader (either critical or normal, whatever works)
Boot into Fastboot
Boot the twrp image from fastboot to the device
Flash the twrp zip to the phone to install TWRP
Flash the magisk zip so I root the device
Reboot and everything works? (Or do I need a custom kernel for TWRP or Magisk to work?)
Is there any issue you see with the above plan of mine?
6) Before I tweak my device in any way, is it okay if I update the device fully? So can I install any update available (OTA) and then unlock the bootloader and root etc? Or do I have to be on a specific version and not on the latest?
7)I have read something about 2 different slots on some flashing forums here, slot a and slot b, but it is not clear to me what that is. Does anyone know what that is? At which point may I face this?
Thank you very much.
Click to expand...
Click to collapse
1) The reason for this is Google had an exclusivity contract to sell through the US cellular company, Verizon; much like the original Apple iPhone did (at first) with AT&T. And, for reasons that are most likely stupid, foolish, and unconvincing in its justifications, Verizon locks their device's bootloaders. So, not that it's "locked" or "unlocked" in terms of carriers, but more-so whether a device is "locked bootloader" or unlockable because it was purchased from Google (or elsewhere, but at least originally Google) and not from Verizon. If you're wondering further, getting it from Verizon would allow Verizon subscribers and customers to be able to "lease" and pay the Pixel off in increments with their usual cell phone bill; but it's not all too exclusive because Google offers to lease if you purchase from them also! The only caveat is you have to pass a credit check when leasing from Google; but, then again, you have to pass a credit check when signing up for a Verizon cell plan as well!
2) So, with my limited understanding between the difference between just a regular "unlock" and an "unlock_critical" is that it might be that a regular unlock allows you to get a R/W access (root access) to the various vital partitions (i.e. system, data [not to be confused with userdata], even boot to a degree) while unlock_critical allows you to straight modify and replace partitions (i.e. what would've been the recovery partition [but now there's no such thing and recovery just resides in the boot partition], the whole system & data partition to have/run custom ROMs, bootloading screen, etc.). But it all is rather convoluted that Google probably agreed and, so you can/should be aware, they updated things within the past few months (I'm guessing June or July) where they rid the need to "unlock_critical" and bootloaders that are newer than a certain point/month no longer needs that fastboot command to unlock the bootloader and everything else in order to flash custom anythings...
3) Okay, so here's a very tricky thing to this.... Technically, yes you can relock the bootloader as well as there have been many who have successfully done so; BUT there are so many more that have COMPLETELY and permanently bricked their device attempting to do so and most (if not all) the experts here would advise anyone to just leave well enough alone. But, if it is insisted and must be, the way to do it is to remove all Magisk modules (because, for whatever reason, these modules can survive a complete flashing of a Full Factory stock image), run a Full Factory image where the flash-all command is left intact (meaning “-w” is unedited; I’ll go more into this later), running it through the initial set up process, then (for good measure, this step might not be at all absolutely necessary) switch slots and run the flash-all command on the other slot, running the initial set up process again, then rebooting to Bootloader Mode and running the fastboot locking command, then unticking (if wished and insisted) unticking the OEM unlocking. Again, a word of warning, that so many have relocked the bootloader and unticked the OEM unlocking which allows the unlocking of the bootloader, then find that their device goes into a bootloop; and since they had just locked the bootloader in 2/all different ways, it leaves rescuing the device with all but the fewest options – usually because it’s forgotten in one way or another returning all of the device back to stock.
If anything, what has been said around these forums is that, if returning to Google, there hasn’t been an (proven) instance that Google refused to repair/replace it because it had its bootloader unlocked. But it’s usually for that fear or re-selling the device in which this is usually sought; but in most (if not all) cases (the experts here figure), having the bootloader unlocked would be refused or looked down upon.
4) So, most of what you assumed here is correct; but may be a bit misguided due to not knowing some things – which, of course, can be expected since you had just said you just moved to this device from a totally different manufacturer (Sony). If you are rooted (Magisk), there is absolutely no way you can update via the regular System Update from an OTA from within the Settings in the OS. And even having just an unlocked bootloader will cause OTAs to not work -- but there are conflicting reports stating differently, but I, personally, am under the understanding that even at that point you cannot.
But here’s the key thing; there really isn’t any reason to install updates by download and using OTAs anyways. Most (if not all) the experts here actually forego the OTAs and merely download the Full Factory stock images from Google’s Developers website and flash those. Here’s the reason; in the “olden days”, flashing a stock Full Factory image would erase absolutely everything and return the device to a complete factory state. But Google, in their “infinite wisdom”, allowed it to be possible to flash this but still withhold and save/keep all of one’s apps, settings, and data – essentially leaving both device data and userdata untouched! This is achieved by simply editing a batch file called “flash-all.bat” (or “flash-all.sh” for Linux and MacOS) and removing the 3 characters “-w” (3rd character would be a space “character”) from within its code. In this manner, OTAs can be considered a “dirty flash” because, while a Full Factory will completely overwrite (I could be wrong, but I believe it erases and formats it) the system, radio, bootloader, boot, etc., which would/should take care of any erroneous bugs or glitches, while OTA’s do not necessarily do this and just “modifies” the existing data; and therefore bugs and glitches may still remain being more on the root of things and/or OTAs would just modify “on top” or elsewhere where those glitches may reside.
And in either/both cases, one would still be required to reflash/reinstall everything root.
But, if insisted, there are multiple methods to achieve a state where you can run an OTA; either downloading an OTA image from Google and manually flashing it (“sideloading”), or unrooting temporarily to be able to use & download the regular System Updater (can be found HERE : https://github.com/topjohnwu/Magisk/blob/master/docs/tutorials.md#ota-installation under the “Devices with A/B Partitions” which is my preferred method if I was to do this sort of thing, but I have never done this so I’m unsure if it even is successful in our device). I even wrote out an in-depth and step-by-step guide, but it is rather convoluted and was written in the beginnings of our taimen and there are most likely more updated methods now; but if you want to check it out, you can HERE.
But, to answer your questions directly; No, flashing the stock image will not allow you to user the stock System Updater; although there are conflicting reports, I am under the impression that anything other than a locked bootloader will allow the stock System Updater to work.
5)More correctly, you boot into “Bootloader Mode” to be able to use the “fastboot” commands. And no, you do not need to permanently flash a custom recovery (TWRP), a custom kernel, or anything else to achieve root – although I do highly recommend it – as you can temporarily boot into TWRP (by downloading the TWRP image file (*.img) and install Magisk in that manner – I do not suggest you root/install Magisk using the app. Other people have had success, but many (most?) have issues that you wouldn’t run into if you installed it via TWRP – but here’s a key thing; no matter what you intend to flash and install, unless you need to have root for it to already be installed, you should always flash Magisk last. Moreso, as the great Az Biker of ‘round thes’ parts greatly suggests, you should even reboot to bootloader after each and every flash separately. Explanation is, for whatever reason and even though many claim to be able to “detect” and modify their flash for an already modified boot and dtbo (where modifications must happen for root access), most don’t play well with Magisk and Magisk must modify the boot and dtbo after all other modifications or else problems can arise (or at least it has for me).
Just keep these things in mind, but, for the most part, your “order” of things will do well enough. Again, just keep in mind that if you are going to install a custom recovery or kernel, try to do that before Magisk as well as if you can avoid it, don’t use the Magisk app to install or manually flash any boot.img if you can help it.
6)No, you don’t have to stick to a specific version; it might even be suggested to update it stock before doing anything. BUT (of course there is a caveat), consider this; many things (especially anything root and specifically TWRP) aren’t really “playing nice” with Android Q/10; so, if you update and go to the most up to date, but don’t wish to run into those glitches/bugs and wish to “hold off” (like I am, actually and for the same reasoning), then of course you should only go up to August (I believe that was the last before the upgrade to Q/10) Full Factory.
7) There are many great resources on the information on having the 2 different slots; I apologize if I can’t recall where I even saw them – other members (maybe an RC or Mod even) input a URL to read and I can’t for the life of me recall where it possibly could be. But, for the most part, you would really only run into identifying and manually changing to a specific one if you were attempting to rescue or deeply modify your device; I can say that me and the great @Az Biker have never felt the necessity to manually change or choose a certain, specific slot. And, my guess, is that, because the coding and flashing output when running the Full Factory states something about “system_other” or a “system_b”, but while the main system can be close to 3GB, the system_other is closer to 300MB, and that boot, dtbo, vendor, and something called lafb has a “_b” partition, I’m thinking it’s something as a safety or backup, maybe something like what used to be in old laptops a sort of RAM to help load things up faster. In any case, it seems that going from one to the other, a to b or vice-versa, doesn’t seem to be too key or much of a hassle, so….take that for what you will.
Alright…hopefully I was able to answer all your inquiries. And, if you have any more, please feel free to ask them…that’s what we’re all about here. And I know I can run on and get wordy, so thank you for bearing with me with all of this.
I mean, it’s really good to have a user/member who really does their research, reading, and due diligence before getting into their new device; there are so many instances here and in my own experience where the “…if I only knew that beforehand…” would be supremely helpful, and supremely easier on everyone else! So that’s to be commended and reinforced…!
Hope this helps and welcome to your Pixel and this taimen forum!
I really cannot thank you enough for your time. I truly appreciate it very much.
1) Very clear.
2) Do you happen to have a link or do you know how to check if my phone supports unlock_critical? How can I check if I have that newer bootloader? Or do you remember where did you learn this?
3) Thank you so much about that. Very clear aand you just saved my phone
4) Very clear.
5) Thank you for the info! Interesting, I was searching on how to root the device running Android 10 (I have fully updated and I really am not going back to Android 9 ), and I saw that you have to patch your boot.img with the Magisk app, and then flash it with fastboot. So first you get the factory image from google and you extract the boot.img and insert it to the phone. Then you load it into Magisk app and patch it. Then moving the patched to the PC, booting to bootloader and flash it on boot partition. This is the way I saw on how to get root working fine with Android 10, not sure if it is the best method or the worst.
6) What do you mean with "go up to August"? Do you mean that the "oldest" image I can flash is "9.0.0 (PQ3A.190801.002, Aug 2019)"? So one cannot go back to 8.0.0 and Google has done something to prevent us from doing that? Also, if I wanted to go back to that August image or any "compatible", the procedure is just to run the flash-all.bat file of that image?
I used to experement a lot with custom roms, custom kernels and mods with my Sony devices, but that was mainly because I wanted stock android and some more features. The thing is that I have almost anything I need with this device, with some minor wishes. So I can leave without flashing custom roms and kernels, but I wanted to just root and at least install Adaway(!!!!!! I cannot leave with those ads!!!!!!), Titanium Backup and some other similar root apps that don't really do any harm. Have you tried rooting Android 10 and it was unusable? Do you suggest that it is not really worth it? The thing is that I love Android 10, the gestures and all the features, and I could not go back to Android 9, even though I only used the phone for a week, I am used to it and really like the way it currently is.
7)Hmm okay so I should not really mess with that. Maybe as I saw online, when flashing stock or unrooting, it is best to flash the same thing to both a and b slots, seems a bit complicated but whatever
Thank you for being so helpful!!
arismelachrinos said:
I really cannot thank you enough for your time. I truly appreciate it very much.
1) Very clear.
2) Do you happen to have a link or do you know how to check if my phone supports unlock_critical? How can I check if I have that newer bootloader? Or do you remember where did you learn this?
3) Thank you so much about that. Very clear aand you just saved my phone
4) Very clear.
5) Thank you for the info! Interesting, I was searching on how to root the device running Android 10 (I have fully updated and I really am not going back to Android 9 ), and I saw that you have to patch your boot.img with the Magisk app, and then flash it with fastboot. So first you get the factory image from google and you extract the boot.img and insert it to the phone. Then you load it into Magisk app and patch it. Then moving the patched to the PC, booting to bootloader and flash it on boot partition. This is the way I saw on how to get root working fine with Android 10, not sure if it is the best method or the worst.
6) What do you mean with "go up to August"? Do you mean that the "oldest" image I can flash is "9.0.0 (PQ3A.190801.002, Aug 2019)"? So one cannot go back to 8.0.0 and Google has done something to prevent us from doing that? Also, if I wanted to go back to that August image or any "compatible", the procedure is just to run the flash-all.bat file of that image?
I used to experement a lot with custom roms, custom kernels and mods with my Sony devices, but that was mainly because I wanted stock android and some more features. The thing is that I have almost anything I need with this device, with some minor wishes. So I can leave without flashing custom roms and kernels, but I wanted to just root and at least install Adaway(!!!!!! I cannot leave with those ads!!!!!!), Titanium Backup and some other similar root apps that don't really do any harm. Have you tried rooting Android 10 and it was unusable? Do you suggest that it is not really worth it? The thing is that I love Android 10, the gestures and all the features, and I could not go back to Android 9, even though I only used the phone for a week, I am used to it and really like the way it currently is.
7)Hmm okay so I should not really mess with that. Maybe as I saw online, when flashing stock or unrooting, it is best to flash the same thing to both a and b slots, seems a bit complicated but whatever
Thank you for being so helpful!!
Click to expand...
Click to collapse
It’s really my pleasure! And I’m just as thankful that you/anyone would even go through the trouble of reading all of that…!
1) Thank you for the compliment
2)Usually, if your bootloader version is within a certain version – which you can find when in bootloader mode – then you either do or do not need unlock_critical. I can’t remember how many months prior to Android 10/Q, it was within 6 I believe, so any bootloader version from 5 or 6 months ago to now, and obviously if you’re on 10/Q, you would not need to run the command unlock_critical. But, if anything, you don’t have to have any fear of it, whether you need to or not, or don’t know your bootloader version, running the “fastboot flashing unlock_critical” when you don’t need to will just amount to a simple error and nothing bad will happen. And if it does end up doing something, well, then that’s a good thing. It almost amounts to unlock_critical-ing twice, the second on will just state that it’s already unlocked and that’s it.
If anything, I believe I found the resource here from the great Az Biker: https://forum.xda-developers.com/showpost.php?p=78908055&postcount=2843
If you are very curious, it should address much of what you’re seeking and/or at least point you to where you might find that information.
3) You’re very welcome. It really is a good thing that saves you in the future, and saves those who try to help some grief as well.
4) Thank you for the compliment.
5) I would say that the process you described is certainly doable, but is far from the best/easiest. From my experience helping many here on this forum, many bugs or things go wrong when loading the stock boot.img to the phone, having Magisk modify it, then getting the modified boot.img and successfully flashing it. More often than not, one ends up having a device turn into a boot loop and are usually forced to flash the stock boot.img and have to give it a number of tries.
The best way (subjectively) is to download the Magisk installation .zip. Then boot into TWRP (which doesn’t mean you have to replace the stock recovery since you can temporarily boot into it), and “Install” it using the .zip. Then everything is automated and done for you, if anything goes wrong you have an output log you can use to troubleshoot, but it seems best to leave it to the experts who created all this than us manually attempting to ourselves.
Oh and AFAIK this method still works on Android 10/Q as it has for Pie and Oreo.
6) I meant that, if you did not wish to update to 10/Q, then you shouldn’t do anything newer than from August’s security update/patch, since all the Full Factory images and updates are of 10/Q. But, if you go to Google’s Developers site, you’ll see that they pretty much list and make available all the Full Factory images ever published; to the point that there are some that go back to Oreo!
And everything you’ve said is understandable. And I kinda feel the same way. For me, in my humble opinion, it is supremely good idea to root and for whatever issues you get doing that, the returns are incalculable. It is most definitely worth it/rooting! The extra options and customizations and modifications all make it worth while and more! And, even if rooting gives the capability of rendering the device rather unusable, take confidence in that Google, in all their “infinite wisdom”, gave us “Bootloader Mode”…and pretty much, as long as you can get into Bootloader Mode and successfully connect to a computer, your phone would never be considered too far lost/gone. I’ve only witnessed that be opposite on less than a handful of cases.
But, most importantly, and if you have been in the rooting and ROMing game, you should well know this, but the most vital part of having root access is the ability to make the best backups! So, as long as you make sure to backup (Nandroid is best) and key times, running into some pitfalls here and there shouldn’t take you all the way out of the game….
7) Yeah…I mean, it is rather fascinating, and when up against an issue and you have an idea that deals with it, that’s when you can read up and learn about it and experiment I imagine. But for me and one of the great ones here in all of XDA, we’ve done all the custom ROM, custom recovery, custom kernel, Full Factory recover, root, Magisk modules, theming, Xposed, and countless other things, and all without the need to ever mess with manually or forcing an assignment between the two.
Again, it’s my pleasure. And if you any further questions or thoughts, bring them on! I’d be happy to address them…
Hope these are helpful….
arismelachrinos said:
I really cannot thank you enough for your time. I truly appreciate it very much.
1) Very clear.
2) Do you happen to have a link or do you know how to check if my phone supports unlock_critical? How can I check if I have that newer bootloader? Or do you remember where did you learn this?
3) Thank you so much about that. Very clear aand you just saved my phone
4) Very clear.
5) Thank you for the info! Interesting, I was searching on how to root the device running Android 10 (I have fully updated and I really am not going back to Android 9 ), and I saw that you have to patch your boot.img with the Magisk app, and then flash it with fastboot. So first you get the factory image from google and you extract the boot.img and insert it to the phone. Then you load it into Magisk app and patch it. Then moving the patched to the PC, booting to bootloader and flash it on boot partition. This is the way I saw on how to get root working fine with Android 10, not sure if it is the best method or the worst.
6) What do you mean with "go up to August"? Do you mean that the "oldest" image I can flash is "9.0.0 (PQ3A.190801.002, Aug 2019)"? So one cannot go back to 8.0.0 and Google has done something to prevent us from doing that? Also, if I wanted to go back to that August image or any "compatible", the procedure is just to run the flash-all.bat file of that image?
I used to experement a lot with custom roms, custom kernels and mods with my Sony devices, but that was mainly because I wanted stock android and some more features. The thing is that I have almost anything I need with this device, with some minor wishes. So I can leave without flashing custom roms and kernels, but I wanted to just root and at least install Adaway(!!!!!! I cannot leave with those ads!!!!!!), Titanium Backup and some other similar root apps that don't really do any harm. Have you tried rooting Android 10 and it was unusable? Do you suggest that it is not really worth it? The thing is that I love Android 10, the gestures and all the features, and I could not go back to Android 9, even though I only used the phone for a week, I am used to it and really like the way it currently is.
7)Hmm okay so I should not really mess with that. Maybe as I saw online, when flashing stock or unrooting, it is best to flash the same thing to both a and b slots, seems a bit complicated but whatever
Thank you for being so helpful!!
Click to expand...
Click to collapse
As @simplepinoi177 said, I'm part of the community that just let's the factory image flash the slot it needs/wants to, and it's never once been an issue.
Look at it like this; some people prefer to simply copy/paste a link or block of text in the PC, some people prefer to CTRL + C then CTRL + V.... BOTH take you to the same end.
Plus, knowing me, the more I manually mess with Slot A vs Slot B, the more chance there is for me to screw something up
Best of luck with your 2 XL, it's a FICKLE device, but it's a really, really great device once you get it as you want it.
Thank you all very much! I am pretty busy these days so once I find some time I will do more research and root it.
@simplepinoi177
I am not sure if your paypal address works, I felt like buying you a coffee earlier, the least I could do with all the time you spent explaining
Oh forgot to ask some minor things,
to make a nandroid backup, I just send twrp.img via fastboot to the phone and boot into it and make it? And if I want to revert back I do the same and restore it?
Also if TWRP asks me the question about if I want to enable modification to the system, what do I answer? Either for the nandroid backup, the restore or for flashing magisk.zip? Do any of those require that enabled?
Lastly, I understood that just unlocking the bootloader alone can result in no OTAs. But, will I keep getting the security updates? I heared something about security updates that are frequently available from the playstore or something like that but I have the phone for less than a week and haven't gotten anything. No OTAs mean no security updates as well? Or they are irrelevant and I will keep getting those security updates once rooted?
arismelachrinos said:
Oh forgot to ask some minor things,
to make a nandroid backup, I just send twrp.img via fastboot to the phone and boot into it and make it? And if I want to revert back I do the same and restore it?
Also if TWRP asks me the question about if I want to enable modification to the system, what do I answer? Either for the nandroid backup, the restore or for flashing magisk.zip? Do any of those require that enabled?
Lastly, I understood that just unlocking the bootloader alone can result in no OTAs. But, will I keep getting the security updates? I heared something about security updates that are frequently available from the playstore or something like that but I have the phone for less than a week and haven't gotten anything. No OTAs mean no security updates as well? Or they are irrelevant and I will keep getting those security updates once rooted?
Click to expand...
Click to collapse
So, about booting TWRP...
You can temporarily boot into TWRP just the one time if you wish. If you are using the newest version of TWRP (for the Pixel 2), they actually give an option to flash and replace the recovery with TWRP from within their recovery environment; I'm guessing they use the temporarily booted twrp.img to install. In any case, you can find the option in the Install section. In any case, it's up to you whether you install it as your custom recovery, but it's easy enough to restore it back to stock recovery either by manually flashing the stock boot.img (and maybe dtbo.img for good measure, as I'm unsure...) and/or if you update your device via a Full Factory (or even a downloaded OTA) image, as that will update and replace the boot partition regardless...
So, about the alert for enabling modification to the system; In the past, I had always enabled it. Of course you would want to have r/w and mounting capabilities towards the device's system and data partitions. But keep this in mind...until the TWRP team updates the latest version, there is no write capabilities/permissions. It will pull up an error that it either can't mount or doesn't write -- For this reason, I'm holding off so I don't have firsthand experience... -- but installing and flashing and backing up from within TWRP does work even if it spits up some errors. What you should be careful about is if/when it asks to install it as a "system service" or something, as general consensus says at no circumstance should you do this as it "forks" up many other things while at it.
But, to answer your question directly, I'm unsure whether you can or cannot install Magisk root or restoring without enabling this "modification" capability, but I say it can't hurt.....
As for your inquiries on OTAs, as I understand it (so anyone please correct me if I'm wrong), but the monthly security updates come with the OTAs (also monthly, so I believe they may be one in the same). I'm unsure about the whole seeing the security updates on the Play Store or something like that, but I highly doubt that is the case. Conventional knowledge says that you can only get these either from the stock System Updater or if you download them yourself and either sideload or "flash-all" it. That's why many (most) experts will download the Full Factory image every month (usually first Monday of the month) and we have this whole step-by-step process in updating platform-tools, unregistering Magisk modules and screenlocks/fingerprints, running the flash-all, temporarily booting TWRP, installing all custom modifications (Magisk last), rebooting after each and every flash/install, then going back into the OS and resetting up the screenlock/fingerprints and Magisk modules. As it would be nice if we could simply and always use the stock System Updater, but in any case, one would need to re-install all the custom modifications anyways. So, it is one of the sacrifices/compromises having a rooted Pixel 2….
But it is peculiar that you haven’t gotten any alert (unless you inadvertently updated to the latest already), for it still should alert you that there is an update available, and usually, if you have unlocked your bootloader, while it’s downloading and attempting to install, it will throw up an error; but everything would look like normal up to that point. But, then again, Google notifying updates on their various devices are intermittent at best. It would be simpler and best if you just keep it in mind that there’s usually the monthly update on/after the first Monday of the month and do what we all do and have to manually install the updates to keep most up to date.
If there’s anything else, you know you can ask…
Good luck and hope this helps…!
I'm on 10 with an unlocked bootloader, 1st gen Pixel. I still get security updates. Twrp doesn't mount /system or /vendor, so I take system/vendor IMAGE backups with no issue. Not sure if I'll get updates still after unrooting. I've always flashed factory after rooting. Theoretically it should return to stock if you flash the Magisk uninstaller. The boot image (boot + recovery + base system) will be restored. You should then be able to get OTA updates. They will be installed to the OTHER slot, so if the phone fails to boot (3 times?) it will switch back to the first slot. If you have issues and want to go back, you can manually switch slots in fastboot or go into twrp, tap reboot, tap the other slot, then reboot system. It will show a message that the slot has changed. You can of course always check the active slot in fastboot to make sure. If you want to roll back an OTA update, reboot to twrp, change the active slot, then reboot system, and it should boot to the older version. Make sure to turn off automatic updates or else it will redownload the same update again. I believe I've lost twrp by installing an OTA update, which installs to the inactive slot, which overwrites recovery, and then boots to that slot. Meaning if you don't have a pc to switch slots in fastboot, you can't go back to the first slot which still has twrp. The command is fastboot set_active, something like that. Quick google search.. No pc means no restore if something goes wrong while you're away from a computer. The only way I know of to change slots at that point is to hard reset 3 times, which will trigger the phone to switch slots. ALWAYS reboot after flashing bootloader/radio. I'm decently sure that the bootloader has to match the system, so if you install lineage Pie, you need to flash the bootloader/radio from Pie or the phone won't boot. Flash bootloader, reboot, flash radio, reboot, flash matching rom. It is technically possible to have dual boot, where one slot is lineage and the other is stock, as long as they're the same Android versions. Lineage Pie/stock Pie for example, because the bootloader won't match if you flash Lineage Oreo/stock Pie. Keep in mind OTAs will overwrite twrp with stock recovery, so if you reboot, you might lose access to twrp, and I don't know of a way to OTA and reboot on the same slot. I don't know if there is an app or command for this, WHICH WOULD BE REALLY FREAKING NICE. Also, when restoring boot from twrp, I always reflash twrp to make sure. It will install to both slots. You can keep a copy of twrp on your data partition. To reflash twrp from within twrp, Install > Select Image > find twrp.img > flash to RAMDISK. If you flash to boot, it will overwrite system, and leave you with only twrp. When installing in older twrp's, I believe it will install to the same slot. With newer twrp's that specifically support Treble, it will flash to the other slot. Don't quote me on that. Due to the single data partition, there's a chance Lineage will have issues with stock data. I've never seen it though. I've dirty flashed a couple times with few issues. I think I've even dirty flashed different OS versions. If you get app crashes, open that app's info, delete its storage/cache, and reopen the app. Most of the app data is the same across versions anyway. The Pixel is a complete pain in the ass when coming from non Treble phones. Sorry if this is repeated info, the posts above are LONG lol. Hope this helps.
Edit- not sure if relevant to you, but I get bootloops when flashing twrp to the ramdisk. There should be an option in twrp to fix it. I always do this after flashing twrp this way.

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