Develop Bugs

Stuck in CWM / Crash on every Rom installations

Hi everyone
Sorry in case of repost.
I have a P5210 (Samsung Tab 3 Wifi). Once rooted everything was allright until I entered in recovery mode from the Rom Toolbox app.
I'm now stuck in a recovery loop mode and can't get out (CWM v6.0.4.7)
I've tried everything from factory reset / cache and dalvik cache wipe, to "fix" zips and so on. But nothing changes.
I've tried to reinstall CWM by putting a recovery image into a script and flash it through CWM. Seems to be done correctly, but when I reboot, it's still the same CWM (no update)
Eventually, i've tried to install some custom ROMs to start fresh : Every installation crashes at "WRITING SYSTEM PARTITION". I get black screen and a reboot.
And I've tried every custom Rom compatible with P5210.
Can you help me to get back to a clean configuration ?
N.

nicobee75 said:
Hi everyone
Sorry in case of repost.
I have a P5210 (Samsung Tab 3 Wifi). Once rooted everything was allright until I entered in recovery mode from the Rom Toolbox app.
I'm now stuck in a recovery loop mode and can't get out (CWM v6.0.4.7)
I've tried everything from factory reset / cache and dalvik cache wipe, to "fix" zips and so on. But nothing changes.
I've tried to reinstall CWM by putting a recovery image into a script and flash it through CWM. Seems to be done correctly, but when I reboot, it's still the same CWM (no update)
Eventually, i've tried to install some custom ROMs to start fresh : Every installation crashes at "WRITING SYSTEM PARTITION". I get black screen and a reboot.
And I've tried every custom Rom compatible with P5210.
Can you help me to get back to a clean configuration ?
N.
Click to expand...
Click to collapse
Hi
It seems you were on kitkat rom which may have updated your bootloader to kitkat version. The CWM needs to be updated to work well with kitkat. I had similar problem with my SM-T210, and solved the problem after updating CWM as per this post for T210:
http://forum.xda-developers.com/showthread.php?t=2433853
Your tab is different from mine so i think you need a fresh stock rom install using odin, then find an updated CWM for your tab.

[Q] Canvas A1 never-ending Bootloop.

Hi guys. Recently my Canvas A1 (Android One) got stuck in bootloop. In order to fix it, I flashed it with the stock ROM provided after unlocking bootloader.
However, even after doing that, on reboot bootloop came back. It got stuck on the animation screen after the Micromax logo and restarted again, and this goes on and on.
So, I flashed it with Wormhole ROM after that. But still, it got stuck at splash screen.
I have tried all this along with wiping dalvik cache, system cache etc.
I have CWM installed on the phone.
I tried to flash it once more with stock ROM but it still got stuck as before. Please help! What should I do?

why you flashed it? you should have claim the warranty.

skd1993 said:
Hi guys. Recently my Canvas A1 (Android One) got stuck in bootloop. In order to fix it, I flashed it with the stock ROM provided after unlocking bootloader.
However, even after doing that, on reboot bootloop came back. It got stuck on the animation screen after the Micromax logo and restarted again, and this goes on and on.
So, I flashed it with Wormhole ROM after that. But still, it got stuck at splash screen.
I have tried all this along with wiping dalvik cache, system cache etc.
I have CWM installed on the phone.
I tried to flash it once more with stock ROM but it still got stuck as before. Please help! What should I do?
Click to expand...
Click to collapse
Remove battery, sims and mmc
Wait atleast 1-2 minutes
Put all back
Now go to recovery and wipe all
Install your stable rom zip
Reboot.

It seems that your phone is bricked. I think that you are under warranty and you should go to service centre. You can also flash a custom ROM

skd1993 said:
Hi guys. Recently my Canvas A1 (Android One) got stuck in bootloop. In order to fix it, I flashed it with the stock ROM provided after unlocking bootloader.
However, even after doing that, on reboot bootloop came back. It got stuck on the animation screen after the Micromax logo and restarted again, and this goes on and on.
So, I flashed it with Wormhole ROM after that. But still, it got stuck at splash screen.
I have tried all this along with wiping dalvik cache, system cache etc.
I have CWM installed on the phone.
I tried to flash it once more with stock ROM but it still got stuck as before. Please help! What should I do?
Click to expand...
Click to collapse
Sir, before flashing any ROM wipe all data and dalvik cache
Try this this may help you:thumbup:

how bro
Mohitash said:
Remove battery, sims and mmc
Wait atleast 1-2 minutes
Put all back
Now go to recovery and wipe all
Install your stable rom zip
Reboot.
Click to expand...
Click to collapse

flash your phone with sp flash tool work well
Sushant Rohan said:
Sir, before flashing any ROM wipe all data and dalvik cache
Try this this may help you:thumbup:
Click to expand...
Click to collapse

my android one (micromax) stuck on boot animations .i cant go to boot selections......what to do ..os is marshmallow

android one stuck in boot loop.
hi,
my android one had received OTA update on 1 may. after that once due to low batt it got switched off automatically and since then it is not booting up. i tried charging it full and also tried to flash it using sp tools. but nothing happens once i click the download button. the mobile dosent detect with its battery removed also. i even tried factory reset but it didn't work.
pl help.

I have flashed custom Rom But
skd1993 said:
Hi guys. Recently my Canvas A1 (Android One) got stuck in bootloop. In order to fix it, I flashed it with the stock ROM provided after unlocking bootloader.
However, even after doing that, on reboot bootloop came back. It got stuck on the animation screen after the Micromax logo and restarted again, and this goes on and on.
So, I flashed it with Wormhole ROM after that. But still, it got stuck at splash screen.
I have tried all this along with wiping dalvik cache, system cache etc.
I have CWM installed on the phone.
I tried to flash it once more with stock ROM but it still got stuck as before. Please help! What should I do?
Click to expand...
Click to collapse
I have flashed official 6.0 after bootloop but no service(emergency call) after that.
I have also tried to install CM13 but the problem is still there
my phones warranty is over now.
please help me .

Sushant Rohan said:
Sir, before flashing any ROM wipe all data and dalvik cache
Try this this may help you:thumbup:
Click to expand...
Click to collapse
My Karbonn Android One also got stuck in the bootloop.
Tried:
1) Wipe data/factory reset
2) Wipe cache partition
3) Mount/System
No improvements. Any suggestions please!!!!

Same here.. [Solved]
skd1993 said:
Hi guys. Recently my Canvas A1 (Android One) got stuck in bootloop. In order to fix it, I flashed it with the stock ROM provided after unlocking bootloader.
However, even after doing that, on reboot bootloop came back. It got stuck on the animation screen after the Micromax logo and restarted again, and this goes on and on.
So, I flashed it with Wormhole ROM after that. But still, it got stuck at splash screen.
I have tried all this along with wiping dalvik cache, system cache etc.
I have CWM installed on the phone.
I tried to flash it once more with stock ROM but it still got stuck as before. Please help! What should I do?
Click to expand...
Click to collapse
Hey,
Try this... Worked for my canvas a1...
1. Install Minimal ADB and fastboot (search google)..
2. Download universal sprout 4(or 8) stock rom from xda..
3. Use philz touch recovery and wipe cache in your mobile through recovery....
4. Now install your stock rom from .zip file..
5. That's it.... Reboot and your phone is back..!
Regards,
Aashif

Ashabilash said:
My Karbonn Android One also got stuck in the bootloop.
Tried:
1) Wipe data/factory reset
2) Wipe cache partition
3) Mount/System
No improvements. Any suggestions please!!!!
Click to expand...
Click to collapse
Just flash stock rom with pc or laptop and if you have custom recovery flash stable rom it will be fixed

how!?
Can someone tell me how m I going to install TWRP even my device stuck on bootloop and can't pass on it. I try the recovery method like factory data clear participation but doesn't even work. My device is firefly mobile plss tell me

markphaul13 said:
Can someone tell me how m I going to install TWRP even my device stuck on bootloop and can't pass on it. I try the recovery method like factory data clear participation but doesn't even work. My device is firefly mobile plss tell me
Click to expand...
Click to collapse
Turn off device completely, wait for 100 seconds and connect the turned off phone to the PC. Hold the Power and Volume Up button together. You will see a menu.
1) Select fastboot mode using volume buttons.
2)On your PC download adb and extract it anywhere and navigate there.
3)open command prompt in that directory and type fastboot devices.
4)you will see serial no. Of your phone if not try reconnecting phone and letting the drivers install.
5)Using Android one toolkit Flash TWRP.
6)Flash whatever new system you want and tadaa......

twrp causes bootloop

Hey everyone, i got a neat little problem with my one X.
I wanted to install Resurrection Remix LP v5.5.0 according to this Thread.
So first of all I flashed twrp 2.6.3.0 to my phone and tried to install RR 5.5.0., which threw me an error (because of layout differences).
I moved on by flashing another recovery twrp2811.BiG to my phone and booted into it, np. So i wiped everything, I think it was the advanced wipe option, I ticked every checkbox and swiped to wipe.
After a short time my phone blackscreened back into the bootloader and when I tried to enter recovery again, it displays the twrp logo for a short time, then crashes and reboots.
Since theres no Android to boot, it repeats it's bootloop. I tried flashing twrp2853-BiG, twrp-2.6.3.0-endeavoru,twrp-2.6.1.0-endeavoru. Fastboot flashes the recoveries and right before my phone restarts it even shows the correct "recovery splash screen" according to the current recovery image flashed.
When I flash recovery-clockwork-touch-6.0.4.8-endeavoru and boot into recovery everythin works, but I can't manage to mount my USB storage anymore.
But that almost doesn't matter since I need twrpXXXXBiG to flash the latest Resurrection Rom, but I cant get any twrp recovery back to work (erase cache didn't help at all).

Lip0ly said:
Hey everyone, i got a neat little problem with my one X.
I wanted to install Resurrection Remix LP v5.5.0 according to this Thread.
So first of all I flashed twrp 2.6.3.0 to my phone and tried to install RR 5.5.0., which threw me an error (because of layout differences).
I moved on by flashing another recovery twrp2811.BiG to my phone and booted into it, np. So i wiped everything, I think it was the advanced wipe option, I ticked every checkbox and swiped to wipe.
After a short time my phone blackscreened back into the bootloader and when I tried to enter recovery again, it displays the twrp logo for a short time, then crashes and reboots.
Since theres no Android to boot, it repeats it's bootloop. I tried flashing twrp2853-BiG, twrp-2.6.3.0-endeavoru,twrp-2.6.1.0-endeavoru. Fastboot flashes the recoveries and right before my phone restarts it even shows the correct "recovery splash screen" according to the current recovery image flashed.
When I flash recovery-clockwork-touch-6.0.4.8-endeavoru and boot into recovery everythin works, but I can't manage to mount my USB storage anymore.
But that almost doesn't matter since I need twrpXXXXBiG to flash the latest Resurrection Rom, but I cant get any twrp recovery back to work (erase cache didn't help at all).
Click to expand...
Click to collapse
Just had an similar issue,
Try flashing first boot.img from the rom you will flash
then flash the recovery twrp big
then do the wipes ..
then flash boot.img and then rom
I thought this worked for me. (i flashed with the unboxed rom)

Just tried it, didn't work for me.

Bump

[Solved]Can't flash rom+gapps

So i originally had a p2c...blabla
Ota updated to p2a4 or something like that. sf244 ROW
unlocked oem (waited 14days)
flashed twrp.
factory resetted+format system. + data partition is ext4
rom flashed successfully
gapps starts flashing but keeps stuck after just 1% of flashing.. always.
or twrp keeps freezing.
Does anyone have a solution?
Right now i'm back to Stock Rom+Magisk 13.3 .

sm00th4f3 said:
So i originally had a p2c...blabla
Ota updated to p2a4 or something like that. sf244 ROW
unlocked oem (waited 14days)
flashed twrp.
factory resetted+format system. + data partition is ext4
rom flashed successfully
gapps starts flashing but keeps stuck after just 1% of flashing.. always.
or twrp keeps freezing.
Does anyone have a solution?
Right now i'm back to Stock Rom+Magisk 13.3 .
Click to expand...
Click to collapse
If you have backup then Install your stock rom and its every components such as boot, recovery etc....
Or download the fastboot files from the p2 thread and flash it.
Then properly install twrp.

How can i properly install twrp?.. I mean, i think i always installed in correctly...otherwise magisk wouldn't work., right?. Because it does. I need your help. I even got Safetynet Pass and Root Apps like Root Explorer is working Fine.
Only the Flashing of Custom Roms etc fails for me... It's weird.

Okey. I just redid it like 5 Times. And i got a bit farther.. new boot animation shows up. But still blue led after it stops.

I FINALLY found the SolutioN!!! I used this https://androidfilehost.com/?fid=817550096634780916 and did the upgrades per ota. Then adb'd my twrp on my phone. And changed data to ext4. Rebooted. Activated usb debugging again. flashed twrp again(just to be sure), booted into twrp. Formatted system,data,cache,dalvik and then flashed my roms. SUCCESS <3

Updating to Android O / Nandroid Restore back to Android N?

Used the search, used google, couldn't find any concrete answers
I am on Android N - unlocked bootloader - rooted via magisk, One Plus 3.
Could I do the following?
use TWRP to make a Nandroid Backup (System+Data+Boot) of my current set-up
then, manually flash (using twrp) Android O
find out I don't particularly like it
Go back to TWRP and Nandroid Restore back to Android N, as if no update ever happened
Or will there be issues?
Thanks

I do that with freedomos. 2.17(N)>3.1(O)>2.17. I restore nandroid and reflash rom

xGOGI said:
I do that with freedomos. 2.17(N)>3.1(O)>2.17. I restore nandroid and reflash rom
Click to expand...
Click to collapse
Should have mentioned I'm using stock rom.
So I'd restore the nandroid via twrp, and I should be good to go?

arthritis said:
Used the search, used google, couldn't find any concrete answers
I am on Android N - unlocked bootloader - rooted via magisk, One Plus 3.
Could I do the following?
use TWRP to make a Nandroid Backup (System+Data+Boot) of my current set-up
then, manually flash (using twrp) Android O
find out I don't particularly like it
Go back to TWRP and Nandroid Restore back to Android N, as if no update ever happened
Or will there be issues?
Thanks
Click to expand...
Click to collapse
There won't be any issue. You are alright with the procedure. Just make sure you use the correct twrp recovery for oreo coz if you use the non compatible recovery then you won't be able to boot into recovery once the oreo is flashed and you are forced to go with the stock recovery
Process I followed when I tried oreo last week
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Do factory reset(wipe everything except internal storage) then flash oreo twrp image. Perform reboot. (no OS warning on reboot option screen will appear) just ignore it. It will boot to recovery even without the OS.
Once booted back to new recovery(oreo twrp)
Flash oreo stock zip and again flash oreo twrp image and reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu. Reboot to OS
Enjoy oreo
To go back to nougat
Reboot to recovery.
Perform factory reset as mentioned above.
Restore everything except bootloader, cache and dalvik cache
Flash nougat twrp recovery. Reboot to system.
Happy flashing.
Edit : use blu sparks recovery for nougat backup.

maxs8007 said:
There won't be any issue. You are alright with the procedure. Just make sure you use the correct twrp recovery for oreo coz if you use the non compatible recovery then you won't be able to boot into recovery once the oreo is flashed and you are forced to go with the stock recovery
Process I followed when I tried oreo last week
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Do factory reset(wipe everything except internal storage) then flash oreo twrp image. Perform reboot. (no OS warning on reboot option screen will appear) just ignore it. It will boot to recovery even without the OS.
Once booted back to new recovery(oreo twrp)
Flash oreo stock zip and again flash oreo twrp image and reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu. Reboot to OS
Enjoy oreo
To go back to nougat
Reboot to recovery.
Perform factory reset as mentioned above.
Restore everything except bootloader, cache and dalvik cache
Flash nougat twrp recovery. Reboot to system.
Happy flashing.
Edit : use blu sparks recovery for nougat backup.
Click to expand...
Click to collapse
Thank you for the detailed procedure.

maxs8007 said:
There won't be any issue. You are alright with the procedure. Just make sure you use the correct twrp recovery for oreo coz if you use the non compatible recovery then you won't be able to boot into recovery once the oreo is flashed and you are forced to go with the stock recovery
Process I followed when I tried oreo last week
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Do factory reset(wipe everything except internal storage) then flash oreo twrp image. Perform reboot. (no OS warning on reboot option screen will appear) just ignore it. It will boot to recovery even without the OS.
Once booted back to new recovery(oreo twrp)
Flash oreo stock zip and again flash oreo twrp image and reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu. Reboot to OS
Enjoy oreo
To go back to nougat
Reboot to recovery.
Perform factory reset as mentioned above.
Restore everything except bootloader, cache and dalvik cache
Flash nougat twrp recovery. Reboot to system.
Happy flashing.
Edit : use blu sparks recovery for nougat backup.
Click to expand...
Click to collapse
Thank you

Hi @maxs8007
thanks for the instructions. I did all that to get back to my nougat rom (PureFusion) and all seem good and phone booted fine. But i am stuck on login screen after booted up. I tried my correct password several times but to no avail. anyway reset my password without factory resetting again?
Thanks for the advise.

sqlpro said:
Hi @maxs8007
thanks for the instructions. I did all that to get back to my nougat rom (PureFusion) and all seem good and phone booted fine. But i am stuck on login screen after booted up. I tried my correct password several times but to no avail. anyway reset my password without factory resetting again?
Thanks for the advise.
Click to expand...
Click to collapse
Go to twrp - advanced - file manager - go to root folder - data - system - and delete files with .key extension. There will be 2 files delete both and reboot.

maxs8007 said:
Go to twrp - advanced - file manager - go to root folder - data - system - and delete files with .key extension. There will be 2 files delete both and reboot.
Click to expand...
Click to collapse
Thank you very much and that worked. I am back in the system.
BTW in your original instructions I had to re flash rom after restoring twrp backup otherwise it didn't boot and stuck at rom animation.

sqlpro said:
Thank you very much and that worked. I am back in the system.
BTW in your original instructions I had to re flash rom after restoring twrp backup otherwise it didn't boot and stuck at rom animation.
Click to expand...
Click to collapse
Thanks for pointing out, I must have forgot to add it. I'll update again.

Hi @maxs8007
I ran into this issue again today! after unlocking as per instructions yesterday and am back into phone and re-set the pin and all good. But today i had to reboot the phone and same issue again , cant login on the lock screen!! i tried deleting those files again but to no avail!!
any ideas before factory reset and loose my data ? Thanks.

sqlpro said:
Hi @maxs8007
I ran into this issue again today! after unlocking as per instructions yesterday and am back into phone and re-set the pin and all good. But today i had to reboot the phone and same issue again , cant login on the lock screen!! i tried deleting those files again but to no avail!
any ideas before factory reset and loose my data ? Thanks.
Click to expand...
Click to collapse
This should not have happened, anyways delete all those files which I've highlighted in the image below. This will reset the lock settings.

Oh sorry I forgot to attach the file. Here it is.

maxs8007 said:
There won't be any issue. You are alright with the procedure. Just make sure you use the correct twrp recovery for oreo coz if you use the non compatible recovery then you won't be able to boot into recovery once the oreo is flashed and you are forced to go with the stock recovery
Process I followed when I tried oreo last week
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Do factory reset(wipe everything except internal storage) then flash oreo twrp image. Perform reboot. (no OS warning on reboot option screen will appear) just ignore it. It will boot to recovery even without the OS.
Once booted back to new recovery(oreo twrp)
Flash oreo stock zip and again flash oreo twrp image and reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu. Reboot to OS
Enjoy oreo
To go back to nougat
Reboot to recovery.
Perform factory reset as mentioned above.
Restore everything except bootloader, cache and dalvik cache
Flash nougat twrp recovery. Reboot to system.
Happy flashing.
Edit : use blu sparks recovery for nougat backup.
Click to expand...
Click to collapse
Hi, OP here. Thanks for this guide.
Unfortunately, it did not work out for me.
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Done
Do factory reset(wipe everything except internal storage)
Wiped fine although I got an error of not being able to wipe 'USB-OTG' or whatever it's called. I ignored it and moved on.
then flash oreo twrp image.
I googled oreo twrp image and got an img file with filename "TWRP-Oreo-OnePlus-3-3T". When I installed the img, it asked the options to choose Boot, System, or Recovery - so I chose System.
Then I rebooted and went back to recovery.
Flash oreo stock zip
flash oreo twrp image
Done
reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu.
This is where it ends. I get stuck at the OnePlus loading screen and forced reboot into twrp and flashed magisk. Once I boot up the OS, I get stuck at the OnePlus logo and that's it.
I actually re-did ALL of the steps again (in case I made a mistake) and still, the same issue. No progression.
Once I gave up on Oreo, I decided to go restore my nandroid
Reboot to recovery. Perform factory reset as mentioned above.
Wiped
Restore everything except bootloader, cache and dalvik cache
Here's the issue:
I press Restore (I uncheck both bootloader and cache, but there's no option for a specific dalvik cache- unless I'm not looking hard enough?) and I get the 255 Error.
Flash nougat twrp recovery. Reboot to system.
I tried to ignore that error and flash the twrp recovery.
Rebooted and it took me to fastboot. Regardless of I keep trying to reboot system it won't work.
I actually made two separate nandroid backups (the same 'everything except system image' as you've described) in case one of the backups was corrupted. Both backups ended up with the same error.
I got too tired of all these errors and just found a stock recovery and ROM and flashed it back. Now, all my apps and settings are gone. To be honest, I just want my phone back to where it was with Nougat.
Can anyone assist me?

@maxs8007, Like I said I did that already but nope still same issue. It wouldn't let me do matter what I did.
---------- Post added at 04:59 AM ---------- Previous post was at 04:54 AM ----------
arthritis said:
Hi, OP here. Thanks for this guide.
Unfortunately, it did not work out for me.
Take nandroid of all options available except system image. (system, data, bootloader, firmware, efs, etc.) on nougat twrp.
Done
Do factory reset(wipe everything except internal storage)
Wiped fine although I got an error of not being able to wipe 'USB-OTG' or whatever it's called. I ignored it and moved on.
then flash oreo twrp image.
I googled oreo twrp image and got an img file with filename "TWRP-Oreo-OnePlus-3-3T". When I installed the img, it asked the options to choose Boot, System, or Recovery - so I chose System.
Then I rebooted and went back to recovery.
Flash oreo stock zip
flash oreo twrp image
Done
reboot to recovery(this time the device will get stuck with a black screen and white LED). Don't panic, just force reboot the device and go to recovery again to flash magisk/supersu.
This is where it ends. I get stuck at the OnePlus loading screen and forced reboot into twrp and flashed magisk. Once I boot up the OS, I get stuck at the OnePlus logo and that's it.
I actually re-did ALL of the steps again (in case I made a mistake) and still, the same issue. No progression.
Once I gave up on Oreo, I decided to go restore my nandroid
Reboot to recovery. Perform factory reset as mentioned above.
Wiped
Restore everything except bootloader, cache and dalvik cache
Here's the issue:
I press Restore (I uncheck both bootloader and cache, but there's no option for a specific dalvik cache- unless I'm not looking hard enough?) and I get the 255 Error.
Flash nougat twrp recovery. Reboot to system.
I tried to ignore that error and flash the twrp recovery.
Rebooted and it took me to fastboot. Regardless of I keep trying to reboot system it won't work.
I actually made two separate nandroid backups (the same 'everything except system image' as you've described) in case one of the backups was corrupted. Both backups ended up with the same error.
I got too tired of all these errors and just found a stock recovery and ROM and flashed it back. Now, all my apps and settings are gone. To be honest, I just want my phone back to where it was with Nougat.
Can anyone assist me?
Click to expand...
Click to collapse
Buddy from my experience the whole thing too finicky and am thinking just factory reset and stick with stock rom. I wasted so much time already. Everytime I get different error, probably recoveries still not fully compatible with Oreo.

sqlpro said:
@maxs8007, Like I said I did that already but nope still same issue. It wouldn't let me do matter what I did.
---------- Post added at 04:59 AM ---------- Previous post was at 04:54 AM ----------
Buddy from my experience the whole thing too finicky and am thinking just factory reset and stick with stock rom. I wasted so much time already. Everytime I get different error, probably recoveries still not fully compatible with Oreo.
Click to expand...
Click to collapse
Could you please tell me what error you get on the lock screen? Could you post an image so that I can get a better idea of what's happening with your device? Also could you please confirm which files have you deleted? This time you need to delete 5 files which are related to lock screen setting and those are the only files responsible for lock settings on the device. I'm somewhat confused because I never ran into such issue while I did the oreo thing
If you have decided to flash stock then just make a backup of data partition so that you won't loose your data and you can easily restore it via twrp.
---------- Post added at 01:06 AM ---------- Previous post was at 12:42 AM ----------
arthritis said:
I googled oreo twrp image and got an img file with filename "TWRP-Oreo-OnePlus-3-3T". When I installed the img, it asked the options to choose Boot, System, or Recovery - so I chose System.
Click to expand...
Click to collapse
I read the entire post and here what I've to say. The above quoted steps is where you went wrong. The recovery needs to to be flashed as a recovery and not as system.
In your case the nougat recovery was never replaced with the oreo recovery because you flashed it as a system. This is where it went wrong. Sorry for the dalvik cache and USB - otg, I didn't mentioned about them. Those are the least important points in flashing though I should have mentioned that already
The next thing you mentioned is you went back to recovery which at that moment was nougat recovery and not oreo recovery. I'll link the modded recovery I used for oreo below
The next thing you did is you flashed oreo zip and again flashed the oreo recovery but as you flashed the recovery as system, the oreo stock rom was automatically replaced with recovery because you flashed it as system and the device didn't boot because there was no android OS to boot up
You got stuck on oneplus boot up screen. (this was going to happen because of the same flashing error at your end).
You were unable to boot back to nougat as well because of the same issue.. Never flash the recovery as system. This won't let you boot the device.
To restore your nandroid backup just follow the steps below
As you confirmed you booted to stock rom with a stock recovery.
Flash nougat twrp via fastboot
Boot back to the twrp recovery and restore the nandroid backup and you are good to go
---------- Post added at 01:18 AM ---------- Previous post was at 01:06 AM ----------
I'll make a video in my free time to help you guys with the steps that I've followed to flash oreo rom and how i came back to nougat successfully.

Hello @maxs8007
Sorry I didn't have any screen shots of the prompt and finally I was fed up with the whole process and had to switch back to oreo stock rom.
Login prompt I was referring to was standard pin required load android. Black background with only pin entry.
BTW I tried blu twrp recovery oreo version and nougat version.
What's interesting is, after several failed attempts it said I got 10 more tries before phone wiped out but after 10 attempts it started counting backwards from zero, - 1,-2 etc., finally I had to flash stock recovery via fastboot and selected forgot password option which reset my phone.
BTW I have deleted all those files from data/system I found another thread but no dice.
Thank you for trying to help us all.

@maxs8007 followed your steps. Booted to oreo, didn't felt as stable as nougat then booted back to nougat. You saved me. Thanks.

sqlpro said:
Hello @maxs8007
Sorry I didn't have any screen shots of the prompt and finally I was fed up with the whole process and had to switch back to oreo stock rom.
Login prompt I was referring to was standard pin required load android. Black background with only pin entry.
BTW I tried blu twrp recovery oreo version and nougat version.
What's interesting is, after several failed attempts it said I got 10 more tries before phone wiped out but after 10 attempts it started counting backwards from zero, - 1,-2 etc., finally I had to flash stock recovery via fastboot and selected forgot password option which reset my phone.
BTW I have deleted all those files from data/system I found another thread but no dice.
Thank you for trying to help us all.
Click to expand...
Click to collapse
I'm sorry that I was unable to help you. The thing is I never used the pin prompt to load android because I reboot too often to flash things via recovery and its too much of a hassle to enter the pin everytime the device is booted and I think it's too much to a security for a android device when there's already a lock screen present once booted to secure the device.
Please don't put the pin entry to load android next time if you flash stuff regularly. It will save you the hassle of going back to stock rom and recovery when something like this ever happens again. The files which I told you to delete in the image I posted above remove the lock screen protection completely
The login pin at the boot to load android was implemented to avoid unauthorized access to the device in case it gets stolen or lost.

maxs8007 said:
I'm sorry that I was unable to help you. The thing is I never used the pin prompt to load android because I reboot too often to flash things via recovery and its too much of a hassle to enter the pin everytime the device is booted and I think it's too much to a security for a android device when there's already a lock screen present once booted to secure the device.
Please don't put the pin entry to load android next time if you flash stuff regularly. It will save you the hassle of going back to stock rom and recovery when something like this ever happens again. The files which I told you to delete in the image I posted above remove the lock screen protection completely
The login pin at the boot to load android was implemented to avoid unauthorized access to the device in case it gets stolen or lost.
Click to expand...
Click to collapse
Frankly no clue why deleting those files didn't reset my pins and I even deleted gatekeeper files too.
Maybe these are lock screen key files and android boot prompt stored somewhere else. Not sure though.