Failed Root, Stuck in Fastboot. - G3 Q&A, Help & Troubleshooting

I'm rather new to the whole android thing and screwed my phone more than I could hope. When the new firmware version came out I thought I needed to unroot to install it. (I wanted it for the WiFi fixes). After installing it I went to reroot and of course the one click root doesn't work, so after trying to find a new method I tried this: http://forum.xda-developers.com/showpost.php?p=60913483&postcount=23 failing to realize it's for D855. My device is a D852 and is stuck in fastboot now. Attempts to continue give error "Unable to find suitable device tree for device (194/0x00010001/121/0)". Just wondering if there's a way to fix this without losing everything or a way to recover my files before resetting. I don't really care about the root at this point.

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[Q] Z1 Compact lost root during Lollipop upgrade

I have just upgraded my rooted Z1 Compact to Sony's Lollipop and have found that it lost root during the process. I have tried rerooting using newroot.rar as previously and all I get is an error message "error: only position independent executables (PIE) are supported." Have tried a clean repair but still get the same error. Have already looked here for a way to do this. I Found "Z1C-lockeddualrecovery2.8.14-RELEASE.installer.zip\lockeddualrecovery%" which I thought might solve the problem, but just get an installation failed message saying adb is not recognised as an internal or external command. Really have no idea what to try now. Have spent hours searching to see what the problem is, but can not find a solution that works. Any ideas please?
You lose root when upgrading, you need to flash a prerooted rom from this thread(via TWRP). First you need to go back to 4.4.4 and root it all over , then install custom recovery. Find a prerooted lollipop from here( I use prerooted RU).Flash it from recovery and you're done. Good luck.
Look here for full instructions: http://forum.xda-developers.com/son...lp/rooting-z1-compact-stock-lollipop-t3090021
With PC Companion you could even use your very own firmware, simply follow the instructions here

LG G3 wont root (tried everything seriously)

Phone is the telus d6852 version and blacklisted...I tried like 4 different methods for rooting the lg ( one click, old orignal method, new etc), tried erasing and not erasing the phone when trying the methods. Downloaded the proper drivers and even tried different versions.
Everything installs Successfully when im doing the root on the computer but when I check the phone its not rooted. Im always able to complete the process. Whats going on?
delete thread pls, found solution

Can't get root twice for bootloader unlock. Got it once, can't do it again.

I had 5.1.1 installed. Couldn't get KingRoot to give temp root (lots of people say you can only do it on 4.4.4, lots of other people say they got it to work on 5.1.1 if you read around).
So I tried downgrading to 4.4.4. Odin failed every time.
So I tried downgrading to 5.0.1. That worked. But kingroot still was unable to get root.
I then found King O Root. Tried that once, no luck. Tried it a 2nd time, and success. I then ran the samsund_fix file. And it changed my CID.
But then you have to restart the phone and run the fix file again.
I have run king o root (and tried kingroot) each at least 30 times now. And I can't get either to give me root access again. I've even tried the desktop version of king o root. Nothing.
I'm SOOO close I feel. But I can't get that last step. Its killing me.
Can anyone help with where to go next?
I figure either 1) I have to find a way to get temporary root one more time. OR 2) find a way to get down to kitkat 4.4.4 to get temporary root.
One other quick question, is the reason I can't get to 4.4.4 because I upgraded all the way to 5.1.1? EVERYTHING I read says 'yeah you can downgrade' but mine won't downgrade. Odin fails with an error So how do I get to 4.4.4? Am I just screwed?
NAND Write Start!
boot.img
FAIL! (Auth)
Are you sure you have to push the file again?
Sometimes it doesn't take and you need to push it again. The last couple of times I unlocked it went on the first try. Go into download mode and see if it says "developer mode."
I was able to unlock on 5.1.1. Kingroot and Kingoroot are extremely unstable besides being Chinese software with all of the risks that entails. There is supposedly a PC version of one of them (shudder) that is allegedly a bit more stable.
Where are you getting the firmware you're trying to use to downgrade?
douger1957 said:
Are you sure you have to push the file again?
Sometimes it doesn't take and you need to push it again. The last couple of times I unlocked it went on the first try. Go into download mode and see if it says "developer mode."
Click to expand...
Click to collapse
So I'm not 100% sure I have to push the file again. I know when I ran the fix file in adb shell the first time, it said I have to run the fix script again. And then when I boot into download mode, I see nothing that says "developer mode".
But, on the other hand. When I check with the eMMC Brickbug checker thing. That says the CID did change according to what the samsung_fix script said it changed it to.
So I *think* the CID changed? But I don't have developer mode. So I think I need to run the fix script again to finish the job.
douger1957 said:
I was able to unlock on 5.1.1. Kingroot and Kingoroot are extremely unstable besides being Chinese software with all of the risks that entails. There is supposedly a PC version of one of them (shudder) that is allegedly a bit more stable.
Click to expand...
Click to collapse
I actually tried a PC version of kingoroot. It also failed numerous times.
douger1957 said:
Where are you getting the firmware you're trying to use to downgrade?
Click to expand...
Click to collapse
I'm getting it from androidfilehost.
https://www.androidfilehost.com/?w=search&s=n910v
That's where I got the 5.0.1 version that worked when I went from 5.1.1 to 5.0.1. But I guess I could try finding a 4.4.4 version from somewhere else. I don't know where though.
It passes md5 check in odin. Though I'm not sure that means much.
nertskull said:
So I'm not 100% sure I have to push the file again. I know when I ran the fix file in adb shell the first time, it said I have to run the fix script again. And then when I boot into download mode, I see nothing that says "developer mode".
But, on the other hand. When I check with the eMMC Brickbug checker thing. That says the CID did change according to what the samsung_fix script said it changed it to.
So I *think* the CID changed? But I don't have developer mode. So I think I need to run the fix script again to finish the job.
I actually tried a PC version of kingoroot. It also failed numerous times.
I'm getting it from androidfilehost.
https://www.androidfilehost.com/?w=search&s=n910v
That's where I got the 5.0.1 version that worked when I went from 5.1.1 to 5.0.1. But I guess I could try finding a 4.4.4 version from somewhere else. I don't know where though.
It passes md5 check in odin. Though I'm not sure that means much.
Click to expand...
Click to collapse
This may be your problem. I don't think you can flash a rooted ROM with a locked bootloader with success. Try this one. (Thanks, @hsbadr!) It's the OEM firmware. This will mean that you'll need to start from scratch. I should note that another poster has had trouble flashing this firmware although other posters including myself have used it successfully.
@hsbadr has a repository of firmwares. What you're looking for is the full firmware. Sammobile is another source of firmware, but they're terribly slow to download from.
douger1957 said:
This may be your problem. I don't think you can flash a rooted ROM with a locked bootloader with success. Try this one. (Thanks, @hsbadr!) It's the OEM firmware. This will mean that you'll need to start from scratch. I should note that another poster has had trouble flashing this firmware although other posters including myself have used it successfully.
@hsbadr has a repository of firmwares. What you're looking for is the full firmware. Sammobile is another source of firmware, but they're terribly slow to download from.
Click to expand...
Click to collapse
I tried that firmware you linked to. That took me back to 5.1.1. I tried kingroot and kingoroot, and still no luck. After 8 or 9 tries each, I still can't get temproot.
I thought it would be better to go back to 4.4.4, and looked through hsbadr's list of roms you linked me to. I tried both of the 4.4.4 full firmwares (NJ5 and NI1) and both fail on odin.
It would seem to me I'm never getting back to 4.4.4/kitkat am I?
Should I just keep running kingroot/kingoroot until I can get temp root? I ran kingoroot at least 30 times last night on 5.0.1 and never got root again. I really don't understand why I could get it once but never again.
Should I try running it a million times on 5.1.1 where I now am again? Or should I go back to 5.0.1? Is there any other way to get temporary root?
nertskull said:
I tried that firmware you linked to. That took me back to 5.1.1. I tried kingroot and kingoroot, and still no luck. After 8 or 9 tries each, I still can't get temproot.
I thought it would be better to go back to 4.4.4, and looked through hsbadr's list of roms you linked me to. I tried both of the 4.4.4 full firmwares (NJ5 and NI1) and both fail on odin.
It would seem to me I'm never getting back to 4.4.4/kitkat am I?
Should I just keep running kingroot/kingoroot until I can get temp root? I ran kingoroot at least 30 times last night on 5.0.1 and never got root again. I really don't understand why I could get it once but never again.
Should I try running it a million times on 5.1.1 where I now am again? Or should I go back to 5.0.1? Is there any other way to get temporary root?
Click to expand...
Click to collapse
I was able to unlock my bootloader twice on 5.1.1. I used Kingroot to unlock Lollipop and Kingoroot to unlock Marshmallow. See if you can find an older version of either root methods. I think I remember reading somewhere that the newer version is flakier than the older stuff. I'm fairly convinced that the rooted ROM you flashed is part of the problem.
As I said, Kingroot and Kingoroot are highly unstable. You may need to spend quite a bit of time in multiple attempts. It comes down to how badly do you want root?
douger1957 said:
I was able to unlock my bootloader twice on 5.1.1. I used Kingroot to unlock Lollipop and Kingoroot to unlock Marshmallow. See if you can find an older version of either root methods. I think I remember reading somewhere that the newer version is flakier than the older stuff. I'm fairly convinced that the rooted ROM you flashed is part of the problem.
As I said, Kingroot and Kingoroot are highly unstable. You may need to spend quite a bit of time in multiple attempts. It comes down to how badly do you want root?
Click to expand...
Click to collapse
Holy success. I have no idea why. But after rebooting the phone for the umpteenth time and running kingoroot another 20 times. It finally gave me another successful temp root, this time while on 5.1.1.
I ran the script again, and now when I got into download mode, I have Mode: Developer showing. Hooray.
BUT....then bootloops. I couldn't get it started.
I then accidentally wiped everything, completely wiped. No operating system according to twrp.
So I looked around, and it appears JasmineRom and CM13 by hsbadr are mentioned as good custom ROMs. So I grabbed CM13, used twrp to install it. And success. I have a working phone. At least, for the past couple minutes.
So a tremendous thank you for giving me some guidance.
I have two more questions for the moment though.
1) How easy/hard would it be to lose developer mode? Do I need to be careful about what roms I flash? Could I lose that? Or now that it is in developer mode, should I be pretty safe in that sticking around?
2) Can I try any Rom on it right now. There don't appear to be a lot of verizon note 4 specific roms around for this phone, because it hasn't had root for long. Will any of the other note 4 roms work? Or should I make sure to stick to only 'proven verizon' roms.
Thanks again for the help.
....
Oh, and how bad do I want root? Badly. Super badly. If I had the money I would have ditched this phone forever ago. I will never buy another phone again on the hope/promise that it will get root soon.
nertskull said:
Holy success. I have no idea why. But after rebooting the phone for the umpteenth time and running kingoroot another 20 times. It finally gave me another successful temp root, this time while on 5.1.1.
I ran the script again, and now when I got into download mode, I have Mode: Developer showing. Hooray.
BUT....then bootloops. I couldn't get it started.
I then accidentally wiped everything, completely wiped. No operating system according to twrp.
So I looked around, and it appears JasmineRom and CM13 by hsbadr are mentioned as good custom ROMs. So I grabbed CM13, used twrp to install it. And success. I have a working phone. At least, for the past couple minutes.
So a tremendous thank you for giving me some guidance.
I have two more questions for the moment though.
1) How easy/hard would it be to lose developer mode? Do I need to be careful about what roms I flash? Could I lose that? Or now that it is in developer mode, should I be pretty safe in that sticking around?
2) Can I try any Rom on it right now. There don't appear to be a lot of verizon note 4 specific roms around for this phone, because it hasn't had root for long. Will any of the other note 4 roms work? Or should I make sure to stick to only 'proven verizon' roms.
Thanks again for the help.
....
Oh, and how bad do I want root? Badly. Super badly. If I had the money I would have ditched this phone forever ago. I will never buy another phone again on the hope/promise that it will get root soon.
Click to expand...
Click to collapse
The only way I know to lock your bootloader is to flash an OEM firmware, take an OTA or mess with flashing bootloader without knowing what you're doing..
What you can flash depends upon which bootloader you have unlocked. Lollipop? You can flash a ROM based on a Lollipop bootloader. Jasmine 4.3 and CM 13 before 6/20 are Marshmallow ROMs based on Lollipop bootloaders. You can also run ROMs made for the N910F/G (also based on Lollipop bootloaders) if you use the proper data fix.
If you want to run a pure Marshmallow ROM, you need to do the unlock dance again. If you're interested in wifi calling, you'll need to stick with a fairly stock OEM ROM like Jasmine 6.0 or 7.0 (both versions are buried pretty deep in the thread) or PaulPizz which I haven't tried but hear good things about.
douger1957 said:
The only way I know to lock your bootloader is to flash an OEM firmware, take an OTA or mess with flashing bootloader without knowing what you're doing..
What you can flash depends upon which bootloader you have unlocked. Lollipop? You can flash a ROM based on a Lollipop bootloader. Jasmine 4.3 and CM 13 before 6/20 are Marshmallow ROMs based on Lollipop bootloaders. You can also run ROMs made for the N910F/G (also based on Lollipop bootloaders) if you use the proper data fix.
If you want to run a pure Marshmallow ROM, you need to do the unlock dance again. If you're interested in wifi calling, you'll need to stick with a fairly stock OEM ROM like Jasmine 6.0 or 7.0 (both versions are buried pretty deep in the thread) or PaulPizz which I haven't tried but hear good things about.
Click to expand...
Click to collapse
Awesome. I downloaded CM13 from before the 20th and it seems to work great. I had to flash the CM13 rom and open GApps at the same time, otherwise the GApps kept crashing. But flashing them at the same time before turning on CM13 for the first time seemed to work.
Thanks for the help. Don't follow things closely enough to have known that I needed a pre 20th build.
Perhaps one more question.
Would you recommend taking the time to unlock the marshmallow bootloader? I don't need wifi calling. And I seem to be getting most of the benefits of 6.0.1 now even though using a lollipop bootloader.
I'm hesitant to try to unlock the marshmallow bootloader, because according to the instructions, it looks like I have to deal with kingroot/kingoroot again to do it. And I had such a hard time getting those to work this first time (easily 80+ tries running kingoroot) before I got temproot, that I'm not sure I want to take the risk of doing it again.
In your opinion, is it worth the risk to unlock the marshmallow bootloader? Or is running marshmallow on the lollipop bootloader reasonable enough?
Thanks
nertskull said:
Awesome. I downloaded CM13 from before the 20th and it seems to work great. I had to flash the CM13 rom and open GApps at the same time, otherwise the GApps kept crashing. But flashing them at the same time before turning on CM13 for the first time seemed to work.
Thanks for the help. Don't follow things closely enough to have known that I needed a pre 20th build.
Perhaps one more question.
Would you recommend taking the time to unlock the marshmallow bootloader? I don't need wifi calling. And I seem to be getting most of the benefits of 6.0.1 now even though using a lollipop bootloader.
I'm hesitant to try to unlock the marshmallow bootloader, because according to the instructions, it looks like I have to deal with kingroot/kingoroot again to do it. And I had such a hard time getting those to work this first time (easily 80+ tries running kingoroot) before I got temproot, that I'm not sure I want to take the risk of doing it again.
In your opinion, is it worth the risk to unlock the marshmallow bootloader? Or is running marshmallow on the lollipop bootloader reasonable enough?
Thanks
Click to expand...
Click to collapse
That's a difficult question to answer and for me would boil down to whether I wanted features available in Marshmallow based ROMs or not.
Wifi calling is a nice to have feature for me but it's not really a dealbreaker. There's a bit more security baked into Marshmallow which is always nice to have.
The development atmosphere is more active over at the generic Note 4 forum. You can now get one of the super ROMs (Note/S7 combo ports) in either flavor. You'll want to stick with ROMs developed for the N910F or G models. They're international phones with fewer integration headaches for our N910V phones. To use those ROMs on our phone, you'll need a data fix most kindly provided by @louforgiveno.
My suggestion in picking a ROM is to zero in on one that seems to have the features you'd like to have and read the entire thread. Look for threads in either the General or Q&A subforums that are dedicated to answering questions about the ROM and read those, too. Some of those threads are upwards to 1,000 posts or more, you say? You'll discover what problems people have had with the ROM and the solutions or workarounds needed to overcome them. You'll also discover just how lazy many posters are either not reading thoroughly or failing to use the search function.
Final suggestions? Do a full nandroid backup before you flash anything. In TWRP, check off all of the boxes. In many of today's ROMs, you'll have a 8 to 10 gig backup file. If you can't keep that on the phone, move it to your PC. There will be far fewer tears if something goes wrong. When you flash a ROM, do a full wipe. I check off Dalvik/ART cache, system, data, and cache. For your first ROM, I would move anything that you have on internal storage off the phone and wipe internal storage too. If you have any Kingroot/Kingoroot cooties, that should clear them off the phone. When you're done flashing a ROM there's an option to wipe the cache. Do it. If you've installed a bunch or apps or deleted them, wipe the Dalvik and cache. It'll help bring the Android stars into alignment as that forces the system to optimize.
Good luck and happy flashing.
You need to go to 5.1.1 use kingOroot and then do it again. Cid will remain that's what I did. Its different for everyone these root methods are pulled from the internet and it will usually take a few time and it will try dufrrent methods of rooting
nertskull said:
I had 5.1.1 installed. Couldn't get KingRoot to give temp root (lots of people say you can only do it on 4.4.4, lots of other people say they got it to work on 5.1.1 if you read around).
So I tried downgrading to 4.4.4. Odin failed every time.
So I tried downgrading to 5.0.1. That worked. But kingroot still was unable to get root.
I then found King O Root. Tried that once, no luck. Tried it a 2nd time, and success. I then ran the samsund_fix file. And it changed my CID.
But then you have to restart the phone and run the fix file again.
I have run king o root (and tried kingroot) each at least 30 times now. And I can't get either to give me root access again. I've even tried the desktop version of king o root. Nothing.
I'm SOOO close I feel. But I can't get that last step. Its killing me.
Can anyone help with where to go next?
I figure either 1) I have to find a way to get temporary root one more time. OR 2) find a way to get down to kitkat 4.4.4 to get temporary root.
One other quick question, is the reason I can't get to 4.4.4 because I upgraded all the way to 5.1.1? EVERYTHING I read says 'yeah you can downgrade' but mine won't downgrade. Odin fails with an error So how do I get to 4.4.4? Am I just screwed?
NAND Write Start!
boot.img
FAIL! (Auth)
Click to expand...
Click to collapse
For me, I had to run Kingoroot from my laptop, and Kingroot never worked.

AT&T V410 Root Idea

Hey everyone,
I apologize in advance if this is breaking any forum rules or if it's a super noob question, but here goes.
I've got a stock AT&T V410 running Lollipop (had I known it would be such a hassle to root, I would've stayed on KitKat).
It's no longer under warranty so I'm thinking about rooting. Unfortunately, the only option that might work is KingRoot. Taking into consideration the possible "shadiness" of KingRoot, here is my idea:
1) Remove microSD and factory reset my V410. This is to have as little info on my V410 as possible before running KingRoot. If I can, I'll even skip adding my Google account.
2) Run KingRoot and see if the root is successful.
3) If successful, install Flashify and flash TWRP (which version should I flash?)
4) If not successful, do another factory reset and continue using my V410 like before.
5) After successfully flashing TWRP, I'll probably do another factory reset, if necessary, to have a clean OS without KingRoot.
6) With TWRP installed, I should be able to make a backup of my current V410 OS, right? I'd like to have this in case I try out CM and want to go back.
I think that's it. Assuming KingRoot can root my V410, does everything here seem viable? I know when I unlocked the bootloader on my OPO it basically did a factory reset anyway, but I want to be safe with KingRoot.
TL;DR
Will a factory reset remove KingRoot? Can I install TWRP and keep the original LG OS?
Won't work. The lollipop bootloader can't be unlocked, and I'm not aware of any exploits. TWRP won't boot. Stay on the lollipop bootloader and you're stuck with kingroot, stock rom, and stock recovery to the best of my knowledge.
I have heard of some methods to try to swap kingroot for supersu once you gain root, but I've also heard of that making a colossal mess with this tablet. Never dug into it, but I suspect supersu attempts to patch the boot image, messes up the signature, then the tab won't boot due to the locked bootloader.
The kitkat bootloader was locked too, but it was susceptible to the bump exploit that let us sign our own boot images.
If you're interested in TWRP and custom roms there is a route to downgrade back to the kitkat bootloader, but it sounds like a giant hassle.
Another random thought, there is a way to enable fastboot on this tablet (you would need root to do it). This method is for the LG G2, but it works fine on my V410. Maybe you could extract the partition images from the kdz in that thread linked above and flash them manually with fastboot instead of LG Flashtool, and get back to kitkat without making such a mess of the internal storage. Disclaimer: I haven't tried this and it could end poorly!!! :silly:
jason2678 said:
Won't work. The lollipop bootloader can't be unlocked, and I'm not aware of any exploits. TWRP won't boot. Stay on the lollipop bootloader and you're stuck with kingroot, stock rom, and stock recovery to the best of my knowledge.
I have heard of some methods to try to swap kingroot for supersu once you gain root, but I've also heard of that making a colossal mess with this tablet. Never dug into it, but I suspect supersu attempts to patch the boot image, messes up the signature, then the tab won't boot due to the locked bootloader.
The kitkat bootloader was locked too, but it was susceptible to the bump exploit that let us sign our own boot images.
If you're interested in TWRP and custom roms there is a route to downgrade back to the kitkat bootloader, but it sounds like a giant hassle.
Another random thought, there is a way to enable fastboot on this tablet (you would need root to do it). This method is for the LG G2, but it works fine on my V410. Maybe you could extract the partition images from the kdz in that thread linked above and flash them manually with fastboot instead of LG Flashtool, and get back to kitkat without making such a mess of the internal storage. Disclaimer: I haven't tried this and it could end poorly!!! :silly:
Click to expand...
Click to collapse
Thanks for the reply jason2678
Good to know that even if I could root my V410, I wouldn't be able to unlock the bootloader, which is my whole reason for rooting. And yeah, current methods to downgrade to KitKat seems like a real pain; for the time being it seems like I shouldn't mess with what works

H736 - is there any way to root it?

My sister has pretty uncommon G4s variant known as H736. It comes preinstalled with Marshmallow.
She asked me to root it, so she could move apps to SD card. I never rooted any LG, but I tried.
First, I checked for bootloader unlock on LG website. If it would give me fastboot code, that would be 5 minutes of work. But it's unsupported... So I need to work with locked bootloader.
Second, I looked around XDA and found root method for H735 (https://forum.xda-developers.com/g4/general/lg-g4s-world-root-lg-devices-t3231759). Because it's almost identical with H736, I tried it. But it didn't work - I did read that it's only compatible with Android 5.1.1 and is broken after upgrade to 6. But H736 comes with 6 preinstalled so... I'm just afraid of installing software from one phone onto another.
Third thing I tried - low effort root (https://forum.xda-developers.com/g4...t-tmo-vzw-intl-variants-soon-root-lg-t3164765). After reflashing rooted system, phone was stuck on LG logo and red LED turned on. Nothing happened in few hours, so I reflashed original system.
I also tried flashing Magisk-patched boot, but it ended the same way.
So is there any way to root this phone? Maybe some exploit, or some way to workaround my issues with low effort root? I don't want to mess with King/Kingo thingies, cause it's known to steal things like IMEI...

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