[ArrowOS 10.0] E2001 (Error 7) + despair, frustration - Lenovo ZUK Z2 (Plus) Questions & Answers

Hello, I really missed the "how to install" section on [ArrowOS 10.0] and got screwed :c
Everytime I try to Install via TWRP I get the "E2001: Failed to update vendor image. Updater process ended with ERROR: 7", and I don't really know what's going on; I saw no TREBLE stuff on this post and went step-by-step on tutorials, but every single time it stops on this error. Actually, afaik having Treble wouldn't be a problem since I came from stock ROM.
The very first time I was on ZUI 4.0.199 and now I'm rolling ZUI 3.5.225 DEV through TWRP (which is the only stock thing I actually managed to install), am I missing something?
It might be something really simple and stupid, so if someone notice it please say it!
I suspect my phone didn't have the 3.5 firmware (which seems to be a requirement), right now I'm searching for the right file to flash.
What I did:
Unlocked Bootloader
USB Debugging
TWRP-3.3.1-0-z2_plus
Didn't go TREBLE or something
Tried wiping everything (Dalvik Cache, System, Data, Cache...)
Reason:
I tried flashing a Custom ROM due to few problems/bugs I had on ZUI 4.0.199 (my phone started rebooting and sometimes it kept rebooting until I charged it). It started annoying me when it kept forgetting WiFi passwords, but since it became almost useless due to rebooting I decided it was time to flash a new ROM and see if I could save my Zuk...
That's how I ended up in this mess, it seemed fairly simply to do but I got lost in the process.

Solution:
Installed 1.9.044 through QFIL, uptaded to 3.5.261 via OTA-Recovery and to 4.0.199 through normal OTA (System Update).
Unlocked bootloader, installed TWRP, did factory wipe and installed ArrowOS 10 (install + cache stuff wipe that appears after installation).
I'll proceed to back up, rooting and mods.
Case closed xD

Related

Installed Lineage 14.1, get messages Hello, I've been trying to install Lineage 14.1

Hello,
[Sorry: can't edit title]
I've been trying to install Lineage 14.1 on my Samsung Galaxy Tab Pro (SM-T520), and haven't been successful.
I keep getting the message "Google Services Framework keeps stopping", sometimes alternating with the message "android.process.media has stopped".
I've used the following installation procedure:
1. Starting with the stock Samsung Android v4.4.2, I used Odin v3.1.2, to root the device, by installing
CF-Auto-Root-picassowifi-picassowifixx-smt520.tar.md
2. I used Odin to install picassowifi TWRP v2.8.7.0. I didn't use the latest v3.1.1-0, because it reboots the
device while making Nandroid backups. Available here
https://eu.dl.twrp.me/picassowifi/
3. I copied several versions of Lineage OS amd Gapps (see below) to the device's SD card
4. I used TWRP to wipe the cache/dalvic/data/system each time, using the Wipe->Advanced option
5. I used TWRP to install the Lineage OS amd Gapps as an atomic operation on the device
6. After installation, I rebooted from TWRP:
- without rooting: I get the message "Google Services Framework keeps stopping"
- with rooting, by installing SuperSU: The device enters into a boot loop, displaying the sliding Lineage logo
I followed the same procedure to update my Samsung Galaxy S4 Mini, and it worked flawlessly.
I tried the following Lineage OS versions, available here:
https://download.exynos5420.com/LineageOS-14.1/n2awifi/
lineage-14.1-20170506-UNOFFICIAL-n2awifi.zip
lineage-14.1-20170715-UNOFFICIAL-n2awifi.zip
I also tried the folowing Lineage OS versions, available here:
https://download.lineageos.org/n2awifi
lineage-14.1-20170608-nightly-n2awifi-signed.zip
lineage-14.1-20170713-nightly-n2awifi-signed.zip
I tried the following versions of Gapps, available here (32-bit arm, Android v7.1, stock variant):
http://opengapps.org/?api=7.1&variant=stock
open_gapps-arm-7.1-stock-20170505.ziip
open_gapps-arm-7.1-stock-20170711
I tried several combinations of these 2 packages. With all the combinations I tried, I got the results summarised above.
This post suggests installing Lineage OS alone without Gapps, and then install Webview Implementation, if not installed:
http://www.lineageosrom.com/2017/02/how-to-fix-google-play-services-error.html
When I tried this and reboot, I get the messages "android.process.media" has stopped, followed by the message "clock has stopped". When I click away these messages, and click on next on the Lineage OS screen, the device enters into a boot loop displaying the sliding Lineage logo. This agrees with the Lineage recommendation, that both packages need to be installed at the same time:
https://wiki.lineageos.org/devices/n2awifi/install
Can anyone please help? I really don't want to go back to Android v4.4.2 on my SM-T520.
Hello so to get rid of the error I would suggest downloading samsung kies 1 not 2 or 3 and flashing completely back to stock then try rooting and flashing rom should get rid of system errors and force closes. Kies will ask you for model and serial number. Serial is found on back of the tablet. As another suggestion I would try resurrection remix by cosmox. It is very stable everything works. I just posted a link in that thread with a link to download samsung kies for a 64 bit windows and other relevant files if you need. Let me know if you need any other help. Also closer inspection of your links. I think for sm-t520 u should be using twrp Picassowifi, not n2awifi so idk if that will work or not. Not sure about that part though because they may have made it work on Picasso.
Thanks paintball.
I confirm that I had used picassowifi TWRP. I've edited the original post to indicate this.
I've also tried what you suggested - I reinstalled the original stock Samsung firmware using Odin, and used TWRP to again install Lineage. Same result, still displaying the same Google Service errors.
I'll look at the Resurrection remix.
Paul
paintball,
I've found a solution, that I thought I'd post here in case anyone else has the same problem.
I wiped the cache/dalvic after each step of the installation:
Wipe-> Advanced -> wipe cache / data / dalvic / system
Install -> flash Lineage -> wipe cache/dalvic
Install -> flash Gapps -> wipe cache/dalvic
Reboot -> don't install SuRoot
I got a Music closed error during the first boot, which hasn't appeared since.
Afterwards, I used Odin to install CF-Auto-Root. The device rebooted twice after this step, but now appears to be OK.
A final problem I had was that it couldn't find my wifi SSID. I solved this by setting wifi region to Europe.
ppmoore said:
Thanks paintball.
I confirm that I had used picassowifi TWRP. I've edited the original post to indicate this.
I've also tried what you suggested - I reinstalled the original stock Samsung firmware using Odin, and used TWRP to again install Lineage. Same result, still displaying the same Google Service errors.
I'll look at the Resurrection remix.
Paul
Click to expand...
Click to collapse
I suggested using Samsung kies which I'm positive works, not Odin, but I'm glad you got it fixed.
ppmoore said:
Hello,
[Sorry: can't edit title]
I've been trying to install Lineage 14.1 on my Samsung Galaxy Tab Pro (SM-T520), and haven't been successful.
I keep getting the message "Google Services Framework keeps stopping", sometimes alternating with the message
<snip>
Click to expand...
Click to collapse
I'm having a similar issue. Mine differs in the following ways.
I was able to successfully install and run LineageOS with OpenGApps full, but reverted to a nandroid backup because I needed some information from the original install. Since then, I have been unable to get past the initial couple of screens for setting things up--and this with the constant "Google Services Framework keeps stopping" error.
I have tried most of the "fixes" I've found but to no avail. I notice that, (1) when I go to the drop-down menu and setup WiFi, as soon as the device connects to the Internet, I go to the Lineage bootup animation and get stuck there. If I hard boot from there, I can get in up to the point where I connect to the Internet (not just router, but actually get through to the Internet) and (2) I cannot enable Developer options--when I try, no matter how many times I click on the Build number, I get no indication of the options being enabled.
I have tried several permutations of Lineage OS nightlies along with various flavors of OpenGApps, with and without root, wiping cache/dalvik/data/system, wiping only some, wiping none.
I also cannot restore the backup of the running LOS that I had up (I did take a backup before going back to the original setup). When I try, I get the same results as above--as if I had backed-up an un-instantiated setup.
Any thoughts?
eckster said:
I'm having a similar issue. Mine differs in the following ways.
I was able to successfully install and run LineageOS with OpenGApps full, but reverted to a nandroid backup because I needed some information from the original install. Since then, I have been unable to get past the initial couple of screens for setting things up--and this with the constant "Google Services Framework keeps stopping" error.
I have tried most of the "fixes" I've found but to no avail. I notice that, (1) when I go to the drop-down menu and setup WiFi, as soon as the device connects to the Internet, I go to the Lineage bootup animation and get stuck there. If I hard boot from there, I can get in up to the point where I connect to the Internet (not just router, but actually get through to the Internet) and (2) I cannot enable Developer options--when I try, no matter how many times I click on the Build number, I get no indication of the options being enabled.
Any thoughts?
Click to expand...
Click to collapse
Hi Eckster,
I have exactly the same problem on a LG G2 with LOS 14.1. It ran July version perfectly but I didn't make a backup and now I'm stuck. Did you ever manage to fix this?
Thanks,
Kevin
Managed to solve it. I formatted all partitions _including_ data (which means you'll also loose all zips you wanted to install so make sure that adb is working). Then rebooted into the recovery. Installed as usual, worked.
detlef25 said:
Managed to solve it. I formatted all partitions _including_ data (which means you'll also loose all zips you wanted to install so make sure that adb is working). Then rebooted into the recovery. Installed as usual, worked.
Click to expand...
Click to collapse
how did you format the partitions? I can only find "format data".. thx
detlef25 said:
Managed to solve it. I formatted all partitions _including_ data (which means you'll also loose all zips you wanted to install so make sure that adb is working). Then rebooted into the recovery. Installed as usual, worked.
Click to expand...
Click to collapse
:thumbsup: I was on lineage 14, all was well. I tried an old stock rom NK2, that was fine. I tried to restore lineage backup via twrp, got this problem with the framework crashing. No amount of re-flashing twrp nor lineage, gapps, modem, bootloader, etc nothing worked; always crashed right after boot to lock screen. Finally twrp "format data" - yes. Now lineage boots to welcome, no crash; restore backup - after copying it back to internal - and all is good.
I'm glad it works but why is it needed in this case to remake the filesystem on data - does it work by removing some bad file or does it work by rebuilding the ext4 and security context? this is with latest twrp twrp-3.2.1-0-klte.
Hi,
don't know if you solved it eventually, or maybe helpful for other people with the same problem. I had the same problem, spent 6 days digging around on the internet why the framework keeps stopping and crashing.
I eventually found out that:
- TWRP 3.0.2.0 is WAY more stable than 3.1.1.0 (which never succeeded in installing gapps without crashing)
- Wiping system, data, dalvik recovery and internal storage is not the only thing that needs to be done. You also need to use the 'FORMAT DATA" button (everything will be wiped from your tablet, so, as always, backups )
- After that, install the lineageOS binary, after the installation, wipe dalvik/cache, go back and install the appropriate GApps package, wipe dalvik/cache and reboot
Say whatever you need to whatever deity you prefer and wait for the tablet to boot.
I hope to be of some help to other people having the same problem
Code:
Sent from my SM-S920L using Tapatalk
grammar
detlef25 said:
Managed to solve it. I formatted all partitions _including_ data (which means you'll also loose all zips you wanted to install so make sure that adb is working). Then rebooted into the recovery. Installed as usual, worked.
Click to expand...
Click to collapse
Was going crazy trying to figure out why LineageOS was encountering so many ANRs. The first time I flashed Lineage it worked beautifully but every time after that it just went nuts. This fixed it for me, thanks dude!
Note to others who may end up here, after formating data I had to install a stock ROM, then wipe and install Lineage. Lineage wouldn't install due to Updater process ended with ERROR: 7 which was because there was some bit of information that was on the data partition that showed the install script that the phone was actually a Note II. Formating data blows that info away but installing stock puts it back on.
LievenVanh said:
I eventually found out that:
- TWRP 3.0.2.0 is WAY more stable than 3.1.1.0 (which never succeeded in installing gapps without crashing)
- Wiping system, data, dalvik recovery and internal storage is not the only thing that needs to be done. You also need to use the 'FORMAT DATA" button (everything will be wiped from your tablet, so, as always, backups )
- After that, install the lineageOS binary, after the installation, wipe dalvik/cache, go back and install the appropriate GApps package, wipe dalvik/cache and reboot
Click to expand...
Click to collapse
Coming into this thread after a few hours of struggle with an old GS4 I can say that this method instantly worked for me as well.
Thanks!
Thanks for the help to resolve my issue of installation. Do you have a solution for Zoom , where my audio (cannot hear other speakers) and video is missing. Did enable access for Mic, Camera etc in App permission.
Look at this thread: https://forum.xda-developers.com/ga...-t520-unofficial-lineage-14-1-t3538770/page86 -- last two posts
hamudistan said:
Look at this thread: https://forum.xda-developers.com/ga...-t520-unofficial-lineage-14-1-t3538770/page86 -- last two posts
Click to expand...
Click to collapse
That solution didn't work. My Zoom audio still not working.

Fully Wiped my OnePlus5T attempting to update to 5.1.5 - Is it soft bricked?

Disclaimer: I am no developer just someone who has done a ton of research in the last day
This may be a long post due to my extensive troubleshooting issues, so here's some background.
OP5T is the first android I've owned and I have had it for about a year. I rooted it right after I received it and haven't updated it since. With the release of Oreo, I entertained the idea of updating my firmware, which I knew meant that I'd need to factory reset my device. Yesterday was the day I decided to do it and man I regret it. Long story short, I fully uninstalled Magisk through the app, attempted to fully remove the root by means of 'full unroot' in the SuperSU app, which failed. I then was stupid enough to fully wipe my device using TWRP (I think I checked the box for every partition in 'advanced wipe'). I was then stuck in a boot loop. Eventually, I managed to use fastboot to boot recovery to TWRP. I have been stuck in this state ever since.
I am currently using 3.2.1-x | blu_spark v8.61 and previously used Magisk.
The main ROM I have been attempting to flash is OnePlus5TOxygen - 5.1.5
- https://www.oneplus.com/support/softwareupgrade/details?code=7
- https://forum.xda-developers.com/oneplus-5/how-to/oxygen-os-5-1-5-signed-zip-t3832336 (not sure how
these are different but their filenames differ so I have tested both
The errors I have received in my troubleshooting process:
- The most infamous: Error 7
- E1001: Failed to update system image
- no file_contexts
- and a host of others I have weeded out using xda as a resource, such as many partition errors, vendor issues,
etc.
- Failed to read command: No error (terminal result when attempting to flash some ROMS through ADB)
The steps I have taken to remedy these errors:
Let me just say I have consulted tons of xda threads regarding error 7, and none work for me. I have attempted to flash using several of the latest versions of TWRP, finding the most success with blu_spark. I have attempted to sideload the ROMS, push them using ADB, and directly place them in the internal storage and no method works. I always get Error 7, with the exception below.
I have attempted to flash stock ROMS for OOS versions 5.1.4, 5.1.5, custom ROMS recommended by xda threads pertaining to the same issue, and many variations of these. Since there are no assert statements in the update_script found in the stock ROMS, which many people mentioned on the forums, I have attempted to approach error 7 from a different angle.
- Each stock ROM starts with this function, which when deleted gets rid of the 'vendor partition is not existed'
error getprop("ro.display.series") == "OnePlus 5T" || abort("E3004: This package is for
"OnePlus 5T" devices; this is a "" + getprop("ro.display.series") + "".");
is_part_existed("/dev/block/bootdevice/by-name/vendor") || abort("vendor partition is not existed, exit
ota!!");
- Even when deleting that, I found there to be two more errors that would appear every time I attempted to
flash, caused by two block_image_update functions that result in errors E1001 and E1002: These both have to do
with updating the system or vendor image.
I have attempted to delete any combination of these. If I don't delete all three functions, I will get an error pertaining to the function I didn't delete. If I do delete them, the ROM will install up to 47% every time and it will cancel (no error). This has happened for all stock ROMS I have flashed, and I have swapped to the latest stock recovery multiple times with no luck.
Additionally, I reformatted data multiple times, set the system partition to ext4, attempted to fix the file system, attempted to mount system in read only to see if that would fix the system update error, all to no avail. I also delete the cache after each ROM flash attempt as well.
I have spent at least 10 hours trying every troubleshoot option I came across on the forums and nothing has helped, which is why I am making this now. I have attempted to flash the current firmware for OP5T with every flash attempt ending with the string '...done' in the terminal, even though nothing has been changed or installed. Every time I try to reboot, it still tells me that I have no OS installed, and I can tell since my internal storage is currently using only around 100MB of usable memory. I have also locked my bootloader, wiped the device, switched to stock recovery, and attempted to clean flash the latest OS with no luck.
In conclusion, it seems that I have deleted my OS so there is nothing to boot to (I go straight to bootloader), there is an error or something missing in my filesystem that is preventing me from fully installing any ROM, and I have tried everything suggested on these forums for similar issues with very limited success. I have done much more than what I mentioned here, and if anything useful comes to mind I will update this post.
(I am also a Computer Science college student that needs a working phone drastically and have already spent so much time diagnosing this issue rather than study that I am ashamed)
I am on the brink of contacting OnePlus, even though I feel as though they wouldn't be much help, or sending this to a repair shop.
Any suggestions/ideas would be greatly appreciated. I will attempt to be as active as possible on this forum as well.
Read my post in this thread, second post. You are fine, as you can still get into TWRP, you are just using a really old version of TWRP, and further complicating things by trying to flash treble ROMs.
Update to the latest version of Bluesparks TWRP which you can flash from your current TWRP, then reflash the full factory ROM. Note it will replace recovery if it is successful.
^^ +1. As long as you can boot into recovery, you are fine. The trick is installing a ROM that is compatible with your TWRP.
I am using codeworkx TWRP 20180822 and running the last Oreo build of Omnirom. First update your TWRP image, then find your OREO rom and install that. You may need to format data with the new TWRP first.

Crosshatch Issue With ROMs & TWRP. Strange Occurrences

Ok, So Here's The Deal.. The Thing.. The WTF
So I had an older version of the Scorpion ROM installed and working fine for a while and wanted to change it up. I downloaded the newest TWRP. Both image and installer.zip, newest Magisk and RR 7.
I flashed the latest stock and you know, followed all the proper steps and after I flashed RR 7, it wouldn't boot up. (Not the issue) as others have had the same issue with RR 7. I left a post about that on the RR 7 thread and went about reflashing stock and proceeded to find a different ROM to check out.
No matter what I try to flash: Lineage, Scorpion, RR 7, dotOS the same thing happens... Everything flashes like it should, but then it won't boot, AND THEN every time I boot back to TWRP to try something else the haptic feedback vibration thing on the pixel 3 xl goes banana sandwich crazy and won't shut off until I reboot to fastboot to flashall to start over. LOL
And not only that but when I jump back to TWRP to try to flash something else stored on the phone, it says the storage is empty and there are nothing available in the menu. And I couldn't get a screenshot but there were some errors that have popped up in twrp as well...
Could This Be An Issue WITH TWRP itself? Because it does it with every single ROM I have flashed today. It's very strange. I have never ran into any issues like this when flashing ROMs, Kernals, etc.
I'm lost. Any help would be awesomely appreciated.
UPDATE: It now vibrates constantly in TWRP and when I reflashed to factory it did the corrupt software screen so I gave it a good ole' factory rest and then it was is stuck in a loop at the G while conecting and disconnecting to the USB over and over and over... now back to corrupt software screen.
I guess I'm just going to have to reflash Stock and just leave it.
Update 2: Still Give The Corrupt Software Thing After Performing FlashAll - soooooooooooooooo
Slo-mo Designs said:
Ok, So Here's The Deal.. The Thing.. The WTF
Could This Be An Issue WITH TWRP itself? Because it does it with every single ROM I have flashed today. It's very strange. I have never ran into any issues like this when flashing ROMs, Kernals, etc. I'm lost. Any help would be awesomely appreciated.
UPDATE: It now vibrates constantly in TWRP and when I reflashed to factory it did the corrupt software screen so I gave it a good ole' factory rest and then it was is stuck in a loop at the G while conecting and disconnecting to the USB over and over and over... now back to corrupt software screen.
I guess I'm just going to have to reflash Stock and just leave it.
Update 2: Still Give The Corrupt Software Thing After Performing FlashAll - soooooooooooooooo
Click to expand...
Click to collapse
Couple of things. Yes there was an issue with v3.2.3-4 TWRP and the vibrator, but that is separate from your boot issues. Go to the dedicated TWRP thread. As for your updates, 1) an FDR just deletes your data and so would not solve your issue. and 2) Guessing you removed the -w switch from the flash-all script or you would not be getting the corrupt software screen. Run the script again with the wipe switch in place, allowing it to wipe your partitions and start over. You've already deleted all your data with the FDR so it won't matter. Best of luck!
Always late to the party.
v12xke said:
Couple of things. Yes there was an issue with v3.2.3-4 TWRP and the vibrator, but that is separate from your boot issues. Go to the dedicated TWRP thread. As for your updates, 1) an FDR just deletes your data and so would not solve your issue. and 2) Guessing you removed the -w switch from the flash-all script or you would not be getting the corrupt software screen. Run the script again with the wipe switch in place, allowing it to wipe your partitions and start over. You've already deleted all your data with the FDR so it won't matter. Best of luck!
Click to expand...
Click to collapse
So yeah... I just now logged back on and saw your response [I have had notification issues on everything from Reddit to FB since I have had the 3XL]
About the response, I have had the issue with it showing the corrupt software screen a bunch when flashing new stuff. The reason I perform the Factory Slap is because it allows me to enter the menu where I have the option to "Boot from ADB" or whatever it says, sideloading seems to be the only way I can make progress when it starts giving the corrupt error.. The reason I didn't perform the full wipe but I can't remember exactly why now since that was over a month ago.
But I finally got it fixed, and I was going to repost because I had found a way to prevent the vibration thing from happening in TWRP but by the time I got around to posting, the new update had fixed it. Lol

Issue on reinstalling any kind of OS - brick?

Hello,
It all began that i just wanted to restart my Oneplus3 unlocked with lineage 15.
But then back in Lineage15 i wasnt able to use my pin anymore + it restarted after few seconds...
Afterwards i ended up in a lineage bootloop.
Ok, then i thought then i do a fresh flash with new lineage 16.
I tried to flash but it said i need to install new modem firmware for Lineage16.
I downdloaded the new 9.0.5 modem + firmware and flashed it from here : https://forum.xda-developers.com/oneplus-3/how-to/op3-flashable-firmware-modem-zips-t3816066
Then i tried to flash LOS16 again but it failed due to some errors on unable to mount some partitions (cache , system, etc).
So i thought i need to wipe or reformat them, as some people suggested to switch from ext4 to fat and back to reinit the partition.
I did this for at least system and internal storage. ( i learned that it was a dumb idea )
Afterwards i was not able to push anything anymore through MTP in TWRP, but i was still able to sideload or push images via adb.
Afterwards i tried to flash LOS16 or LOS15 via TWRP again but it always ends up to a "unable to mount /system (invalid argument" error at some point of the installation.
I thought: Okey maybe i go back to stock as i messed up the internal file system somehow, and go back to LOS afterwards.
So i flashed the stock recovery for nougat which i got from here: https://www.****************/2017/0...th-latest-oxygen-os-firmware-complete-unroot/
Then i tried to flash various stock Oxygen roms with the stock recovery, by using wipe + system reset + adb sideload:
4.02, 4.51, 5.08, 9.0.5
4.02 and 9.0.5 didnt run until the end.
Flashing 5.08 works but ends up in a black screen when starting it.
Flashing 4.51 works but when i start it i run into a bootloop ( 2 Dots circuling forever )
I also tried to use the 4.51 version to flash LOS again but it did not work out
I just tried again to flash 4.51 but it also didnt work out anymore. :\
So, what do you think i could do to get a working OS on my system again?
Did i do something on the installation of LOS or Oxygen ?
Can i use a backup from a friends Oneplus3_T to get a working system partition / full OS again?
Should i unbrick the phone by using one of various guides to go back to fully stock? I am kind of afraid of this, as some people describe some final brick in the threads which may be caused by modem firmware problems (Sahara issue). https://forums.oneplus.com/threads/guide-oneplus-3-3t-unbrick.531047/ or https://forums.oneplus.com/threads/guide-mega-unbrick-guide-for-a-hard-bricked-oneplus-3.452634/
Thank you so much, i kind of getting mad about it
@julledd
Backup from 3T seems like a bad idea.
You may have a hardware issue.
Your best bet is to use one of the tools available in the various unbrick guides. If one doesn't work, try another.
Best of luck!
Hi thx for your help!
i tried different unbrick tools (9.0.5 / 3.1.2 / 4.0.5) and after several attempts i get it flashed to the phone. But in the end it still ends up in a bootloop, either at the android logo or the circuling dots. Via Sideload i am also not able to flash a new OS. It always breaks somewhen >50%.
In very rare cases i am then able to go to the OS, but when i go to "About Phone" to unlock it for TWRP, it freezes before showing anything. I guess there is internally something broken which forbids it to show the internal state of the phone. Every boot is different, and i cannot see any system in this failure of my phone.
Do you have any more hint?
I am already at a point where i want to exchange the main PCB.. Is this possible for the Oneplus3? Can i also exchange it with a Oneplus3T PCB?

Tinkering with Redmi Note 5, flashing TWRP, trying to enable Camera2, bootloop...

Hello there,
I've recently received my Redmi Note 5 back from warranty service. As much as I like the phone, one thing I always found really disappointing about it is that for whatever reason, it is, as far as I know, the only phone from the Redmi Note series that has Camera2 disabled by default, preventing me from installing GCam. Fortunately, I have found multiple tutorials on how to activate it. Since I've wiped my data before sending it, now was the best time to do some tinkering.
I've used my friend's laptop to unlock its bootloader and install TWRP (it refused to work on my desktop for some reason). the official TWRP web page warned me that the phone uses dm-verity, which is something none of the tutorials mentioned. After some further digging, I found out that should I mess with it, the phone would simply revert any changes, and to prevent this, I needed to flash a dm-verity disabler, such as LazyFlasher
Thinking nothing would go wrong, I decided to try flashing TWRP and deal with the system replacing it with the stock recovery later. All went as planned, and the phone booted into the custom recovery with no issues. It asked me for a password to decrypt the internal storage, which I don't know, so I skipped this step. The first thing I did was creating a backup.
I then tried rebooting, just to see if it would really revert the changes. It did, but it didn't go as smoothly as I had hoped. The system became laggy to the point where it was basically unusable, often freezing for more than 30 seconds after just opening an app. Not knowing what to do, I flashed TWRP back, this time with the dm-verity disabler. A tutorial on how to do this that I found recommended I wipe the cache after flashing the tool. I tried doing that, but the process failed immediately. I rebooted the phone, and the next thing you know, I'm in a bootloop. I've let it sit for a while, but even after some time, the system wouldn't start. Fortunately, I was still able to get back into TWRP.
I restored the backup I created earlier. This, for the most part, solved my issues, the system works fine-ish again (aside from an occasional lag, but it's not nearly as bad as it was) and isn't trying to replace TWRP with the stock recovery anymore, but I'm kinda afraid to tinker with it again. I'd really hate having to buy a new phone just because I bricked the one I have (and I didn't even get to flash the tool that was meant to enable Camera2).
What did I do wrong? Should I've formated the internal storage to gain access to it first? Did flashing TWRP without dm-verity disabled somehow mess up the system? Would flashing a custom ROM bypass having to disable it? I'm confused...

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