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OnePlus 7 Pro Flashing doesn't work properly

Hey guys,
so first of all I wanna let you know that my device is not bricked or something (it was a couple of times though).
But let's get started with my issue. For me, personally, I have experienced that the slot system (A/B Slot) doesn't work that good. I had a OnePlus 3T before and I never had any problems with flashing, but now...
My impression is that it's a lot easier to brick its' device than before. Every time I want to flash a new OS I gotta use the msmtool.
1. I boot to recovery mode through the OS
2. I boot to fastboot trough the OOS stock recovery
3. I try to flash TWRP to erase the system
4. Flashing works, but I can no longer boot into recovery mode
5. I have a bootloop (fastboot mode only)
6. I have to use that msmtool
7. I have some old OOS (9.5.5 or something)
8. I unlock the bootloader through the OS & fastboot
9. I boot into TWRP, delete everything and flash another ROM
10. Everything works and the cicle begins again​
I really don't know why I'm always stuck in that bootloop... Maybe you guys could help me and give me your personal opinion on the slot system?

I totally know that feeling. I started with a tmo op7p, flashed international, unlocked bootloader, try to boot TWRP, and nope. Switch slot, it works. Flash it, great. Make a backup with TWRP of my working system, flash ROMaur, won't do anything but boot to TWRP. Open TWRP file manager and every file on internal storage is a ton of folders with jumbled strings of letters and numbers for names. MSM tool back to intl stock, try lineage... Nope. Keeps telling me to do a factory reset. I did, but I do another and still boot loop. MSM to intl, try other roms, same outcome.
I can unlock my bootloader and root it and run intl stock but that's it.

oxadedzn said:
Hey guys,
so first of all I wanna let you know that my device is not bricked or something (it was a couple of times though).
But let's get started with my issue. For me, personally, I have experienced that the slot system (A/B Slot) doesn't work that good. I had a OnePlus 3T before and I never had any problems with flashing, but now...
My impression is that it's a lot easier to brick its' device than before. Every time I want to flash a new OS I gotta use the msmtool.
1. I boot to recovery mode through the OS
2. I boot to fastboot trough the OOS stock recovery
3. I try to flash TWRP to erase the system
4. Flashing works, but I can no longer boot into recovery mode
5. I have a bootloop (fastboot mode only)
6. I have to use that msmtool
7. I have some old OOS (9.5.5 or something)
8. I unlock the bootloader through the OS & fastboot
9. I boot into TWRP, delete everything and flash another ROM
10. Everything works and the cicle begins again
I really don't know why I'm always stuck in that bootloop... Maybe you guys could help me and give me your personal opinion on the slot system?
Click to expand...
Click to collapse
Doing it wrong.
If you are currently rooted and a new OS comes out you can do the following and you don't need to flash with TWRP or use a computer.
1. Download the full OTA. You can use Oxygen updater to do that or use a link in the stock ROM section on this site.
2. Make sure you have the Magisk and the TWRP zip on the phone.
3. Do a local update in the system area but do not reboot.
4. Launch Magisk manager and select install.
5. Use the OTA install option to inactive slot.
6. Now you can reboot. You have installed the new OS and root also.
7. Once rebooted do another local install. This will install in the slot that you were just running. It will fail the first time, but work the second time.
8. Repeat 4.
9. Repeat 5.
10 . Repeat 6.
You now have both slots with the same OS and rooted.
If you want to install TWRP.
Launch Magisk and install the TWRP zip.
Reboot into recovery. This is important because you cannot boot in slot with TWRP unless Magisk in installed.
Now flash the Magisk image file.
Now in TWRP select the other slot and reboot into recovery.
In recovery install Magisk image to this slot.
Now you have TWRP and Magisk in both slots.
I have done it that way since 9.5.7 and have not had an issue.

tech_head said:
Doing it wrong.
If you are currently rooted and a new OS comes out you can do the following and you don't need to flash with TWRP or use a computer.
1. Download the full OTA. You can use Oxygen updater to do that or use a link in the stock ROM section on this site.
2. Make sure you have the Magisk and the TWRP zip on the phone.
3. Do a local update in the system area but do not reboot.
4. Launch Magisk manager and select install.
5. Use the OTA install option to inactive slot.
6. Now you can reboot. You have installed the new OS and root also.
7. Once rebooted do another local install. This will install in the slot that you were just running. It will fail the first time, but work the second time.
8. Repeat 4.
9. Repeat 5.
10 . Repeat 6.
You now have both slots with the same OS and rooted.
If you want to install TWRP.
Launch Magisk and install the TWRP zip.
Reboot into recovery. This is important because you cannot boot in slot with TWRP unless Magisk in installed.
Now flash the Magisk image file.
Now in TWRP select the other slot and reboot into recovery.
In recovery install Magisk image to this slot.
Now you have TWRP and Magisk in both slots.
I have done it that way since 9.5.7 and have not had an issue.
Click to expand...
Click to collapse
Irrelevant ISH, but ever had that one bootloop where it only bootloops at the "Warning Bootloader unlocked screen" constantly? When I try to access fastboot, it'll just go straight to recovery without even waiting for input (to my luck, of course, until I had to uninstall magisk in full, reinstall, make sure TWRP was reflashed and did the "Fix recovery bootloop", though that wasn't the seemingly the issue). The issue got resolved, but it was very scary for that to have happened as soon as i enabled sudohide (I always had it work, but with huge problems, but never enough to bootloop me to death)

JhinCuatro said:
Irrelevant ISH, but ever had that one bootloop where it only bootloops at the "Warning Bootloader unlocked screen" constantly? When I try to access fastboot, it'll just go straight to recovery without even waiting for input (to my luck, of course, until I had to uninstall magisk in full, reinstall, make sure TWRP was reflashed and did the "Fix recovery bootloop", though that wasn't the seemingly the issue). The issue got resolved, but it was very scary for that to have happened as soon as i enabled sudohide (I always had it work, but with huge problems, but never enough to bootloop me to death)
Click to expand...
Click to collapse
If you install TWRP on a 7 Pro without installing Magisk you will absolutely boot loop. If you wipe the system in one slot and have a differing ROM from the active slot you can in fact boot loop. Although the systems are different, the settings between the systems are shared.

Sorry to say, but nothing about those steps is correct. Follow some guides in the guides section to get aquatinted with the A/B system

Arden144 said:
Sorry to say, but nothing about those steps is correct. Follow some guides in the guides section to get aquatinted with the A/B system
Click to expand...
Click to collapse
You are absolutely incorrect.
When going from 9.5.10 to 9.5.11 and all my previous upgrades it has been:
1. Local install of the new OS with a full OTA since I am rooted.
2. Do not reboot.
3. Install Magisk to inactive slot.
4. Reboot (Slot will automatically switch to the one recently updated).
5. Local install of OS into the other slot, fails first time, do it again.
6. Install Magisk into inactive slot.
7. Reboot. (Slot will switch to recently updated slot).
8. Both slots now have latest OS and are rooted.
You can also install TWRP if you like.
No computer needed.
This works.

tech_head said:
You are absolutely incorrect.
When going from 9.5.10 to 9.5.11 and all my previous upgrades it has been:
1. Local install of the new OS with a full OTA since I am rooted.
2. Do not reboot.
3. Install Magisk to inactive slot.
4. Reboot (Slot will automatically switch to the one recently updated).
5. Local install of OS into the other slot, fails first time, do it again.
6. Install Magisk into inactive slot.
7. Reboot. (Slot will switch to recently updated slot).
8. Both slots now have latest OS and are rooted.
This works.
Click to expand...
Click to collapse
That's completely unnecessary and just avoiding the purpose of the a/b system.
All it would take is:
1. Local install
2. Install magisk to inactive slot

I messed up - stock ROM update via TWRP :(

Hi all,
update: I made update at the end.
My OP7 version is GM1900, so far I was on build 10.0.6GM57BA with Magisk 20.4, but for some time I had 10.0.8 update notification.
Today I decided to update build.
I consider myself as medium experienced user the type that is using rather step by step guides.
But this time I thought I don't need guide cause I should remember how I did update last time. In the meantime I help my son to make homework what was an additional distraction.
I always download full OTA from oneplus.com support but it turned out there was no 10.0.8 (instead there was/is 10.0.7). So I tried to search for 10.0.8 and I found this xda news. As there is a mess with versions and links and I was doing it on mobile Chrome I accidentally tapped Global/India Full OTA
Steps I made:
1.1. Downloading file OnePlus7Oxygen_14.P.29_OTA_029_all_2009152124_ba2424a.zip
1.2. Downloading official TWRP twrp-installer-3.4.0-0-guacamole.zip
1.3. Boot into TWRP.
1.4. Flash twrp-installer-3.4.0-0-guacamole.zip
1.5. Restart to TWRP
1.6. Flash magisk uninstall
1.7. Flash 10.3.5 (India & Global) - OnePlus7Oxygen_14.P.29_OTA_029_all_2009152124_ba2424a.zip
1.8. Flash magisk 20.1 (but forgot to reboot after flashing TWRP it was first mistake I think)
1.9. Ended with 10.3.5 (India & Global) build with stock recovery and without Magisk.
Next I tried to return to GM57BA.
Then the steps I made:
2.1. Downloading official build 10.0.7.GM57BA from oneplus support site.
2.2. Downloading Mauronofrio's TWRP twrp-3.4.0-0-guacamole-unified-Q-mauronofrio.img and twrp-3.4.0-0-guacamole-unified-installer-mauronofrio.zip
2.3. Boot OP7 into fastboot then command "fastboot boot twrp-3.4.0-0-guacamole-unified-Q-mauronofrio.img"
2.4. After phone booted into TWRP I flashed twrp-3.4.0-0-guacamole-unified-installer-mauronofrio.zip
2.5. Restart to TWRP
2.6. Flashed magisk uninstall.
2.7. Flashed 10.0.7.GM57BA
2.8. Flashed magisk 20.4
2.9. Only then I rebooted to TWRP (I think it was mistake).
2.10. Then I saw first problem - there was no lockscreen security with TWRP (unlock pattern).
2.11. Restarted to TWRP again - the same no unlock pattern screen, no access to data partition
2.12. I started to panic and restarted into system.
2.13. I ended with hard bootloop - I mean I can't even do force reset (force reboot) by pressing and holding the Power and Volume down buttons at the same time :crying:
I'm sorry for this long description but I thought it will be helpful to diagnose what I messed up.
Questions and my thoughts:
1. Did I messed up by not restarting after last magisk flash?
2. What to do now? Do I need to wait for battery discharge? Then unbrick using MSM tool?
3. Is there any chance to repair and preserve personal data? I have TWRP backup about 3 months old. Maybe after battery discharge I should go to TWRP and then sideload this backup? Maybe magisk uninstall or stock boot image flash?
Please help
Update:
After battery discharge I managed to boot into TWRP recovery (Mauronofrio's 3.4.0.0)
Then couldn't access /data
But when I switched to Slot B and reboot to recovery situation is back to normal (I guess).
I'm still in recovery scared to boot into system.
What to do now?

kold11 said:
Hi all,
update: I made update at the end.
My OP7 version is GM1900, so far I was on build 10.0.6GM57BA with Magisk 20.4, but for some time I had 10.0.8 update notification.
Today I decided to update build.
I consider myself as medium experienced user the type that is using rather step by step guides.
But this time I thought I don't need guide cause I should remember how I did update last time. In the meantime I help my son to make homework what was an additional distraction.
I always download full OTA from oneplus.com support but it turned out there was no 10.0.8 (instead there was/is 10.0.7). So I tried to search for 10.0.8 and I found this xda news. As there is a mess with versions and links and I was doing it on mobile Chrome I accidentally tapped Global/India Full OTA
Steps I made:
1.1. Downloading file OnePlus7Oxygen_14.P.29_OTA_029_all_2009152124_ba2424a.zip
1.2. Downloading official TWRP twrp-installer-3.4.0-0-guacamole.zip
1.3. Boot into TWRP.
1.4. Flash twrp-installer-3.4.0-0-guacamole.zip
1.5. Restart to TWRP
1.6. Flash magisk uninstall
1.7. Flash 10.3.5 (India & Global) - OnePlus7Oxygen_14.P.29_OTA_029_all_2009152124_ba2424a.zip
1.8. Flash magisk 20.1 (but forgot to reboot after flashing TWRP it was first mistake I think)
1.9. Ended with 10.3.5 (India & Global) build with stock recovery and without Magisk.
Next I tried to return to GM57BA.
Then the steps I made:
2.1. Downloading official build 10.0.7.GM57BA from oneplus support site.
2.2. Downloading Mauronofrio's TWRP twrp-3.4.0-0-guacamole-unified-Q-mauronofrio.img and twrp-3.4.0-0-guacamole-unified-installer-mauronofrio.zip
2.3. Boot OP7 into fastboot then command "fastboot boot twrp-3.4.0-0-guacamole-unified-Q-mauronofrio.img"
2.4. After phone booted into TWRP I flashed twrp-3.4.0-0-guacamole-unified-installer-mauronofrio.zip
2.5. Restart to TWRP
2.6. Flashed magisk uninstall.
2.7. Flashed 10.0.7.GM57BA
2.8. Flashed magisk 20.4
2.9. Only then I rebooted to TWRP (I think it was mistake).
2.10. Then I saw first problem - there was no lockscreen security with TWRP (unlock pattern).
2.11. Restarted to TWRP again - the same no unlock pattern screen, no access to data partition
2.12. I started to panic and restarted into system.
2.13. I ended with hard bootloop - I mean I can't even do force reset (force reboot) by pressing and holding the Power and Volume down buttons at the same time :crying:
I'm sorry for this long description but I thought it will be helpful to diagnose what I messed up.
Questions and my thoughts:
1. Did I messed up by not restarting after last magisk flash?
2. What to do now? Do I need to wait for battery discharge? Then unbrick using MSM tool?
3. Is there any chance to repair and preserve personal data? I have TWRP backup about 3 months old. Maybe after battery discharge I should go to TWRP and then sideload this backup? Maybe magisk uninstall or stock boot image flash?
Please help
Update:
After battery discharge I managed to boot into TWRP recovery (Mauronofrio's 3.4.0.0)
Then couldn't access /data
But when I switched to Slot B and reboot to recovery situation is back to normal (I guess).
I'm still in recovery scared to boot into system.
What to do now?
Click to expand...
Click to collapse
To force restart I need to use power button and both volume keys..
To keep TWRP you need to flash rom, then without restart flash TWRP again, then restart TWRP, then flash Magisk.
Likely the r reason why your system doesn't boot is because it can't decrypt your data.
Why this happens I don't know, maybe in the upgrade they changed something related to the exception and then by downgrading again it isn't able to read it anymore.
I would suggest to:
Flash the latest rom.
Flash TWRP
Reboot TWRP
If TWRP then doesn't ask for PIN or password, then I'm afraid you have lost your data. I hope you have a backup.
I'm that case format (not just clear) data -> yes
Reboot TWRP
Then flash Magisk.

Thanks for reply.
Like I wrote in update after changing slot to b I managed to run TWRP with decrypted data, made even new new backup.
I also restarted into system and it occurs I'm still 10.3.5 (India & Global) GM57AA, so everything I flashed in with build 10.0.7.GM57BA was unsuccessful.
I think I messed with changing inactive slot procedure. Noob mistake I need to read about it.

kold11 said:
Thanks for reply.
Like I wrote in update after changing slot to b I managed to run TWRP with decrypted data, made even new new backup.
I also restarted into system and it occurs I'm still 10.3.5 (India & Global) GM57AA, so everything I flashed in with build 10.0.7.GM57BA was unsuccessful.
I think I messed with changing inactive slot procedure. Noob mistake I need to read about it.
Click to expand...
Click to collapse
I would suggest do restore your device with msm unbrick tool.
1. From recovery, turn off (i noticed, that when tried to turn off from somewhere else, the device would auto reboot later in downlaod mode)
2. In windows, turn off the connection & open device manager: Get this driver http://download.windowsupdate.com/c..._fba473728483260906ba044af3c063e309e6259d.cab
3. Press volume/down + volume/up, after about 5s connect to pc
4. Your device should show up in device manager, open it and install the driver manuell from step 2 (keep device options open... if fail you need to uninstall the driver before trying again)
5. Now wait for about 40s, if your device stays in download mode, you can open & start the msm tool (leave the options in msm as they are)
6. It will take about 280s, then the device will reboot.... (its normal that it stays longer at the oneplus logo at first start)
MSM Thread: https://forum.xda-developers.com/oneplus-7/how-to/op7-unbrick-tool-to-restore-device-to-t3954325
I've also uploaded the 10.0.5OOS Unbrick tool on mega, because android file hosted downloads are so terrible: https://mega.nz/file/ArZFkYpS#Z_rOIwZeYN27IG6L8rOi-yfw8wXGiwvK-uWVDlsmvTI

No OS My phone is stuck in bootloader mode What to do

My phone is stuck in boot loader mode. I tried to install a custom rom and flashed everything but i got an error while installing it and it came out of twrp recovery and noe it is stuck and is not switching on. Please help

https://forum.xda-developers.com/t/...4-0-58-international-oxygen-os-9-0-2.3903272/
Use that if your phone is international model if not look around for the t-mobile msm tool. More details, more help. What exactly did you flash, how did you flash it, what recovery did you use....

flash713 said:
https://forum.xda-developers.com/t/...4-0-58-international-oxygen-os-9-0-2.3903272/
Use that if your phone is international model if not look around for the t-mobile msm tool. More details, more help. What exactly did you flash, how did you flash it, what recovery did you use....
Click to expand...
Click to collapse
I was trying to install evolution x rom after wiping the data we should flash the os to install custom rom right so i flashed the os and while installing some error occured it came back to bootloadr mode and is stuck. I was using twrp recovery.I saw a youtube video and was doing everything
please tell me what to do

[GUIDE] Mega Unbrick Guide for A Hard Bricked OnePlus 6
Similar to the previous threads for OnePlus 5 or OnePlus 5T, here are the necessary packages to unbrick/revive a hard bricked OnePlus 6. Download: https://www.androidfilehost.com/?w=files&flid=271466 OnePlus 6_180513_氢OS线刷包.rar After using it...
forum.xda-developers.com

How to flash a rom on oneplus 6.
Boot twrp: fastboot boot twrpxxxxx.img
Fash firmware OOS 10.3.9 or whatever latest is for your device. Get from repo on guides section here or from oxygen updater app. Make sure it's for your device. Don't flash global OOS on tmobile model...After flashing OOS latest, flash EvoX rom, flash twrp installer zip, flash finalize zip, reboot recovery, flash magisk latest. I use canary, format data-swipe to confirm in twrp, reboot system.
That's how you flash a rom on oneplus 6. Finalize is a script that can be found with simple search here on xda that copies firmware to both slots so you don't have to reboot recovery and flash OOS again. I used a Oneplus 6t a year prior to what I use now Pixel4XL and I flashed everything known to mankind available for it just this way.
Boot twrp,
Flash OOS,
Flash EvoX,
Flash twrp installer zip,
Flash finalize zip,
Reboot recovery,
Flash magisk
Format data-swipe to confirm yes,
Reboot system.
Update magisk once booted via magisk manager app icon in app drawer.
You should be able to hold down power+volume up and get in to bootloader node again and do this. Just keep holding them down till you see the "start" screen and let go, boot twrp from fastboot...

Oneplus 7 Pro - Sim cards no longer detected after latest OTA update

Hello all,
Everything was working on my rooted oneplus 7 pro, until I applied the latest OTA update. Once that was installed and the phone rebooted, my once working mobile network was no longer working. The phone says no sim card detected and every few seconds the default phone app displays the force close crash dialog. Has anyone else encountered this issue? It looks like rolling it back to the previous OxygenOS version is the only solution, but I'm not quite sure how to go about that safely. Any help would be greatly appreciated.
The device is using Magisk and TWRP
I also tried uninstalling Magisk, but that did not resolve the issue.

Have you tried just doing a reset in settings?
.This is how I install stock oos
You can use MSM tool to revert OOS, or you can try this step:
1. Reboot twrp/lineage recovery, format data. Reboot bootloader
2. Fastboot boot into TWRP FBEv2
3. Sideload official TWRP 3.5.2.9-0 installer (found on TWRP website). Reboot recovery
4. Copy OOS 11.zip to internal storage,or copy to otg drive,Flash OOS 11.zip. Reboot recovery again
5. Format data in OOS stock recovery & Reboot
6. After boot into OOS 11, just local upgrade rom .zip again, you will have OOS on both slots
7. If root is needed fastboot flash magisk patched boot.img

I'll give that a shot today. Do you have the links to MSM and OOS11.zip ? Thanks

ChimmyChanga said:
I'll give that a shot today. Do you have the links to MSM and OOS11.zip ? Thanks
Click to expand...
Click to collapse
Index of /list/Unbrick_Tools
I don't have the oos 11 off hand , I know you can download the latest and greatest directly from OnePlus website under support

I have the same problem i cant do nothing

No SIM card, or No network available -- Any help would be kind and appreciated.
At the start:
Oneplus 7 pro - GM1915 /US- active t-mob sim
LOS 18.1 (latest)
magisk 22.x upgraded along the way to current magisk 25.2, 8.0.7 app
Running LOS recovery ##// no issues since 18.1 came out
USB 2.0 port(s), good'ol red/white cable(s). ##// verified cables/ ports.. typical troubleshooting to rule them out)
Current Platform tools in $PATH
Issue. No SIM card.
Steps to masonry school:
I upgraded my LOS 18.1(magisk 25.2 persistent) to oos 12, then went to LOS 19.1. The update(s) went fine, or so it seemed... Booted fine. Still rooted. All's good until reboot. Then no SIM card found.
Mess around with turning off wi-fi, nfc, mobile data turn on airport mode... all iterations of that..
Occasionally it saw the sim card! Says, "Network unavailable." Shows T-mob on sim 1... Thinks it has 2 sim cards... ##// can't help but think this might be something
Set APN T-mob blah blah... wait.. go to local t-mob verify my sim is provisioned properly get new sim..
Their take is(of course) it's time to upgrade lol... Got a spare $800 laying around? If not, you can pay for it after there is no longer a recession lol... I digress(in distress)
##//
I started having worse problems upon performing the next 19.1 LOS_11-13-22 ota.
Immediately I got into a bootloader loop. I first tried my patched_110622-LOS_boot.img and got nothing but a seemingly successful boot, then those lovely "Power Off" words and back to bootloader.
Once back in fastboot I changed partitions(keep in mind I have not flashed anything to alter the LOS 19.1 boot restructuring at this point. Reboot. Same outcome. Bootloader loop. Booting to recovery, start, power off or bootloader all do the same thing... quickly reboot into bootloader.
I then decided to boot to twrp. I went ahead and did this
#>/ fastboot getvar all ###/// yielding partition a
#>/ fastboot flash boot_a twrp.img
#>/ fastboot boot twrp.img
The screen goes to "fastboot mode" and hangs. power+up_vol & it finally boots into twrp.
I then twrp installed the LOS update, which lead to more bootloops. Various dalvik cache/data and cache wipes after flashing, factory reset won't complete the reset... I have exhausted my limits of attempts at this point, so off to MSM I am.
All versions/drivers correct. On a win10Px64 now. Connects fine.
Now this is where it gets odd(to me anyway). I tried to go to stock oxy10, for GM1911AA and it hangs on the param preload. Something I don't remember seeing since 2020'ish. Tried multiple firmware until it took one, that was H.30. Successfully flashed. Booted. Found SIM card. Thought that was it.. Then I unplugged my usb cable from the op7p and *poof * reboot. After much digging and changing metedata preloads, various things to try to get this thing to work.
Current:
I can get it to run LOS 19.1 No SIM card found. Rooted with twrp and magisk no prob.
Just can't get it to work with the SIM, whether seen or not.
I am suspicious that I should have used H.31 for the MSM... however now it won't get past param preload with anything earlier than 11.5.1 Oxy 12. Also, I even went so far as to try flashing the CB firmware variant to see if it would take the T-mob firmware. Won't let me, says not compatible. So now I have a rooted op7pro that can only communicate via signal lol.. and not long at that...
Any thoughts/help/direction/suggestions, would be greatly appreciated.

TWRP can't decrypt + Fastboot loop

Unsure if this is the place since its also related to TWRP 3.7, any help is appreicated
Got stuck in a weird situation and wondering if anyone has ideas.
Current State:
Slot_A on OOS 11, can boot TWRP via Fastboot
Slot_B on OOS 12, can only boot into Fastboot
Originally on OOS 11, booted TWRP and made backups of all partitions (data, boot, system image, vendor image, etc.). Forgot to move this to computer so this is all still stored on device.
Proceeded with OOS 12 upgrade (into Slot B). Patched magisk, rebooted, then flashed TWRP 3.7 (FBEv1), direct installed magisk, rebooted. - Everything was functional, but decided to go back to OOS 11.
Thinking I could just use the TWRP backup made on OOS 11, I did the following:
Booted into 3.7 TWRP
Restored the backup for boot, system image, and vendor image
Set active slot to Slot A and reboot
It doesn't allow me to boot into the OS (Presumably because the data was re-encrypted for OOS 12?)
Set active-slot=b and reboot, but it's locked to fastboot.
I've attempted a few things, but I can't boot back into OOS. I would prefer to retrieve my TWRP backups first before doing an MSM reset.
When on Slot_A (older), I can only boot into TWRP 3.6.2 and 3.7. I'm guessing 3.6.2 can't decrypt since it's only configured for A11 and under, but not sure why 3.7 can't decrypt my data.
- It doesn't even ask for pin when TWRP launches; maybe it's reading the System for Slot_A and thinks i'm still on A11?
- running `twrp decrypt {pin}` doesn't seem to work. Unsure if there's something done to my lockscreen pin to be used as the encryption key/password?
When on Slot_A, attempting to boot into either the system or TWRP hangs.
Things I've tried:
Flashing A11 boot.img and magisk-patched boot.img to Slot_A -> Hangs on 1+ Spinning dots
Flashing A12 boot.img and magisk-patched boot.img to Slot_B -> Hangs on 1+ logo (Does show up on ADB though)
Booting Slot_B into TWRP 3.6.2 (Official, and Nebrassy unofficial for A12) and TWRP 3.7 -> Gets stuck on "Fastboot Mode" screen (fastboot cli still responds) or Hangs on snapdragon logo
Edit: Ended up using MSM. Needed device for work

I have a similiar problem to flash twrp to my phone ,
each time i try i get a fastboot loop too and i have to reset/unbrick it with the msm tool back to android 11
i use the OnePlus_7_Pro_Global_OxygenOS_11.0.5.1 package to unbrick the phone , i dont know how long and often i tried now to get twrp to work so that i can flash a custom fw ... i want root and a android 13 based cfw but i dont get it to work :/

I got it working with crdroid. heres some stuff
guacamole - Google Drive
drive.google.com
be carefull
¯\_(ツ)_/¯​
------------------------------------
I got stable and decrypted fs RW working on crdroid 9.1 firmware other than some weird bugs
i put it in the 2023-twrp

MissAnthropin said:
I have a similiar problem to flash twrp to my phone ,
each time i try i get a fastboot loop too and i have to reset/unbrick it with the msm tool back to android 11
i use the OnePlus_7_Pro_Global_OxygenOS_11.0.5.1 package to unbrick the phone , i dont know how long and often i tried now to get twrp to work so that i can flash a custom fw ... i want root and a android 13 based cfw but i dont get it to work :/
Click to expand...
Click to collapse
I have the exact same problem! Have you found a fix yet? This seems to happen when I try to install Android 13 based roms, and when I install a rom like Lineage OS, using their recovery, it works just fine.

No, and I don't know why, maybe i do something wrong or it is the Modell that make this trouble.
I thinking to sell my OP7PRO and buy another one ( and then I have the same problem with the new phone )
No no let the jokes aside, it must work, i mailed with OnePlus Support Germany but they only helped me to install A11 w/root and recovery, i thought ok now I can update to A13 so I loaded A13, unpacked the boot.img, Patched the boot.img
Installed A13 w/out errors, rebooted - Fastboot loop

RIP
Started ranting instead

TWRP for guacamole development seems to be fairly scarce, last working recovery I tried was when they started using fastboot boot to enter it. It was pretty hacky even then, currently it seems that nebrassy is the maintainer for twrp for guacamole.
Github: https://github.com/nebrassy Android 12 thread: https://forum.xda-developers.com/t/recovery-12-official-teamwin-recovery-project.4269551/ Nebrassys Telegram has helpful info as well: https://t.me/NSSFB
last update I found was 2022:10:2 - https://www.pling.com/s/Phones/p/1835156
after a few days of torture I read a thread on here saying if you flashed twrp via magisk like you would if it was a magisk moule it would work normally. It worked on my device so I assume that its universal. I have filled my computer with guacamole related files Im uploading here before im forced to reinstall my os:
guacamole - Google Drive
drive.google.com
Just a fyi from what I have gathered from my experience you can get a stable twrp recovery with persistant / read write access and disabled encryption and basically use it with little error up until you try flashing a newer custom rom. My guess is when flashing a cfw the bootloader gets rewritten causing our boot image to become corrupted. Flashing twrp over / booting to twrp via fastboot or trying to install it via another custom recovery causes boot / recovery failures... meaning you cant really use it for flashing custom roms. I cant find the post with the install instructions I seen that helped me so here is what I think it was,
Found it: https://forum.xda-developers.com/t/how-to-make-twrp-work-in-your-stock-a12.4522667/#post-87985325
~ I have bricked this device constantly while ****ing around so unless youre prepared to go to war with the ****er, Id quit messing with it.
MSM flashing with windows is the only way to recover from the void.
Click to expand...
Click to collapse
using Linux systems for EDL is a bit more difficult to figure out but can be done > EDL https://github.com/bkerler/edl/blob/master/edl | https://github.com/andersson/qdl
Click to expand...
Click to collapse
~If you do brick I created a fastboot flashable A13 Oxygen os recovery rom and uploaded it to my google drive found under recovery_brick_fastboot.zip ~
Click to expand...
Click to collapse
lastly be mindful of a/b partition configuration or youll find yourself lost or bricked
Installation:
1. Obviously unlock the bootloader - OEM Unlock
2. Flash custom recovery (lineage/crdroid/etc)
3. (Personally I root here and again on the active slot so) flash magisk.zip
4. Reboot into installed ROM and install magisk android app and complete setup, reboot system
5. (another thing I like to do before flashing twrp) setup magisk enable all the basic options like prophide, deny list then set root userspace option to global.
6. Flash TWRP .zip (https://dl.twrp.me/guacamolev2/twrp-installer-3.7.0_12-0-guacamolev2.zip) via magisk
Alright! After all that you should be able to reboot into recovery via adb reboot recovery / fastboot or power menu and you find a working twrp recovery installed.
If you need help or want to **** around with the device you can @ me anytime and ill do my best to halp
2600 IRC (cornelius.scuttled.net >Nick captain >channel #guac)
Telegram https://t.me/+pxvpKToFo6pkMGYx
Discord https://discord.gg/MhvWgEfY

Pics

RolandStoner said:
Pics
Click to expand...
Click to collapse
You Confussing me a lot with your Posts before ...
i´m unsure what you mean exactly,
my bootloader is unlocked, with magisk i got a working root but after that i fail
what you mean with flash twrp with magisk ?
after unlocking the bootloader and get root, i tryd to flash twrp like before on other devices but that seems not working because i get then the fastboot loop
on another thread i found here on xda too, the guy wrote dont forget to activate the fastboot loop fix in the advanced options
but i not tried it yet again , so what should i do now ?
for now , i´m back on android11 , with stock oxygen os firmware
i have to do now the things like i did before again , unpack boot.img from the firmware that is installed on the device
patch it with magisk, flash it with "fastboot flash boot boot-patched.img" or is this step senseless ?
i mean you only wrote unlock bootloader and flash a cfw , but i don´t have a chance to flash a custom fw without a custom recovery ??
my recovery on my op7pro have no options for "install zip" or something else
addendum:
like i said you confused me a lot
addendum two:
or i do what i said before .. i sell my op7pro and buy me a one where i havent so much trouble installing twrp and root
i never had a phone before that made so much trouble in installing simple twrp ...
but i don´t found a phone yet that is compatible with kali and the pentest tools or wardriving tools like the oneplus , so i have a problem ,... i think i should drink now my selfmade blackberry liquor ( or blackberry booze ? ) and let the smartphone be a smartphone for now and power off my brain for a while

Yes, you need to patch your boot image via magisk and flash it with fastboot.
After you let magisk do its first time setup and then once it reboots you go to Magisk > Modules and flash the twrp recovery .zip file you got from twrp. link:https://twrp.me/oneplus/oneplus7pro.html just like you would if it was a magisk module.

the password for twrp decryption is your pin. Here are simpler instructions
https://forum.xda-developers.com/t/how-to-make-twrp-work-in-your-stock-a12.4522667/#post-87985325

****... I forgot a step.
after flashing twrp as a module in magisk you dont reboot, you go back to the main screen hit the install button and choose direct install

Now I understand it more, i had before rooted the phone successful with magisk, but then I made a wrong decision and booted into Fastboot and flashed TWRP in Fastboot Mode as I did it before with all my Smarties i had before, coz those way with Fastboot worked before all the time so I never thought that this is the error in the procedure
I give the twrp flashing with magisk a try.
Thx for the help

MissAnthropin said:
Now I understand it more, i had before rooted the phone successful with magisk, but then I made a wrong decision and booted into Fastboot and flashed TWRP in Fastboot Mode as I did it before with all my Smarties i had before, coz those way with Fastboot worked before all the time so I never thought that this is the error in the procedure
I give the twrp flashing with magisk a try.
Thx for the help
Click to expand...
Click to collapse
Thank @yassine2217 because I would never have done so either.... Still many bugs but twrp is twrp