Database Users

Help, bootlooped! Locked bootloader.

Hello!
I have the Nexus 6P and I have successfully rooted 16 phones over the past 4 years and never had a problem I couldn't fix. Today I made a mess of my new phone.
I had a perfectly working custom ROM with an unlocked boot loader with TWRP (2.8.7.2) installed. I installed some custom soft keys and got into a boot loop. I went and flashed what I thought was the stock ROM according to the website I was following, and I re locked my boot loader like a fool and was going to eventually unlock it.... turns out I was still boot looped.
I have tried:
sideloading 3 different zips, always get the message "cannot read zip" whatever the zip is
I tried changing the names, doing the full names, doing a stock rooted zipped ROM, nothing works.
I have used SkipSoft and Wugs toolkit and I can't flash ANYTHING or transfer files onto the phone unless the bootloader is unlocked.
I have installed the Google drivers multiple times, ADB devices always works, it seems to not be a driver issue because I can do everything else fine.
I have let the phone sit for 35 minutes in bootloop waiting for it to come back online so I can tick that "OEM unlock" button in the settings menu.
I have also done a dozen other things, the problem is nothing I have done or tried allows me to get any ROM or any file onto the device to flash in TWRP.
Help?

ok shot in the dark here. I had a boot loop until I flashed the flashable vendors zip
I got it in this thread:
http://forum.xda-developers.com/nexus-6p/development/rom-pure-nexus-layers-fi-wifi-calling-t3244563
Give it a whirl if you haven't already.
Found this in the Pure Nexus Project thread, so props to them for providing this.

-MotoNexus- said:
Hello!
I have the Nexus 6P and I have successfully rooted 16 phones over the past 4 years and never had a problem I couldn't fix. Today I made a mess of my new phone.
I had a perfectly working custom ROM with an unlocked boot loader with TWRP (2.8.7.2) installed. I installed some custom soft keys and got into a boot loop. I went and flashed what I thought was the stock ROM according to the website I was following, and I re locked my boot loader like a fool and was going to eventually unlock it.... turns out I was still boot looped.
I have tried:
sideloading 3 different zips, always get the message "cannot read zip" whatever the zip is
I tried changing the names, doing the full names, doing a stock rooted zipped ROM, nothing works.
I have used SkipSoft and Wugs toolkit and I can't flash ANYTHING or transfer files onto the phone unless the bootloader is unlocked.
I have installed the Google drivers multiple times, ADB devices always works, it seems to not be a driver issue because I can do everything else fine.
I have let the phone sit for 35 minutes in bootloop waiting for it to come back online so I can tick that "OEM unlock" button in the settings menu.
I have also done a dozen other things, the problem is nothing I have done or tried allows me to get any ROM or any file onto the device to flash in TWRP.
Help?
Click to expand...
Click to collapse
Thanks, the problem is I can't find a way to sideload anything or move a file over. Everything results in a myriad of errors.

tigercranestyle said:
at worst, you would have to invoke the flash-all command via adb once you extracted the couple of times that you have to. directions are on google's factory image site.
may not be the answer that you were looking for, but it always feels great having a clean device to work with. i mean as it stands, you would have to set everything back up on whatever rom anyway if you somehow got out of the problems you were having. you would spend more time doing that instead of just going the factory image route.
toolkits are fun, but learning your way around them is even more so.
Click to expand...
Click to collapse
I'm gonna check the flash all,I've never done that before. I think that would be all the images in the tgz factory image? Anything to get my phone back yeah, I just need it working again.
-UPDATE- I tried the flash all batch in the system image and I tried the flash all batch command and neither work.

Hey man - crazy story - I literally just got done messing with a toolkit and the EXACT same situation happened to me. Locked bootloader, bootloop, everything. What you need to do is do a complete wipe of everything in TWRP so you can access /data from your PC (unless it isn't messed up currently, and you can decrypt within TWRP, I couldn't...) Then, download Cataclysm (maybe something else will work, idk, but I just did it with cataclysm) and bam - it boots, head to developer options and get the box checked.
Stock images didn't work, nothing did... was scared I had a brick. The saving grace for us is that we both got TWRP installed. No more toolkits for me!

Melamunna said:
Hey man - crazy story - I literally just got done messing with a toolkit and the EXACT same situation happened to me. Locked bootloader, bootloop, everything. What you need to do is do a complete wipe of everything in TWRP so you can access /data from your PC (unless it isn't messed up currently, and you can decrypt within TWRP, I couldn't...) Then, download Cataclysm (maybe something else will work, idk, but I just did it with cataclysm) and bam - it boots, head to developer options and get the box checked.
Stock images didn't work, nothing did... was scared I had a brick. The saving grace for us is that we both got TWRP installed. No more toolkits for me!
Click to expand...
Click to collapse
I have already done the advance wipe and the format data, I just tried again and my computer will not read it as storage with MTP enabled.
Thanks though!

tigercranestyle said:
after extracting the tgz file, it should become a tar file. after extracting that tar file, it should become the six files listed below. these files should be in platform-tools to start from scratch.
bootloader-angler-angler-02.45.img
flash-all.bat
flash-all.sh
flash-base.sh
image-angler-mmb29m.zip
radio-angler-angler-02.50.img
once they are, open command line in that directory (platform-tools) and then "flash-all" should work. if it doesn't make sure you post the error that you're getting on your computer so that others can help.
Click to expand...
Click to collapse
I followed all these steps, I unzipped it and everything and put it in my fastboot folder. I still get the "unknown partition "all" " orrr flash is not recognized as an internal or external command, operable program or batch file. In an attempt with desperation I tried opening every version of the batch file, in the tgz and tar and unzipped AND in the fastboot and it all gives the radio img error.
I still do have my fastboot device connected, to my knowledge that means it can't be a driver problem right?

-MotoNexus- said:
I followed all these steps, I unzipped it and everything and put it in my fastboot folder. I still get the "unknown partition "all" " orrr flash is not recognized as an internal or external command, operable program or batch file. In an attempt with desperation I tried opening every version of the batch file, in the tgz and tar and unzipped AND in the fastboot and it all gives the radio img error.
I still do have my fastboot device connected, to my knowledge that means it can't be a driver problem right?
Click to expand...
Click to collapse
You can't flash anything in fastboot with a locked bootloader. The only way you can get your device to work is by using TWRP to flash a rom.

The flash all command doesn't work because the extracted tar file has A zipped folder inside that has to be extracted also with radio and I think recovery zipped up. You have to extract those two files to put them in the tar file and then you might be able to flash all. But as long as you can fastboot devices you should be able to flash all 6 files and have a brand new device.

tigercranestyle said:
sorry for the late reply. not always here.
1. did you unlock the bootloader again before doing all of this?
2. list the files that are in your platform-tools folder.
3. when you executed the "flash-all" command earlier, you did do it with the dash in between flash and all... right? also, you're doing it without the quotation marks, right?
sorry if they seem silly. just never really know.
Click to expand...
Click to collapse
He can't unlock the bootloader without booting into a rom. He needs to use twrp to flash a full system but I am not sure how to help with that when he can't sideload.

just an unrelated question... why did you lock the bootloader again? what was the purpose?
also, as mentioned... locked bootlader, odds arre USB debugging and OEM unlock are also not checked.... afaik, youre in trouble... hopefully someone else can sav you, im out of ideas

akellar said:
You can't flash anything in fastboot with a locked bootloader. The only way you can get your device to work is by using TWRP to flash a rom.
Click to expand...
Click to collapse
Are you telling me that I'm bricked?
I have no way of transfering files to the devices, it won't read as anything to transfer files and ADB won't sideload anything.

tigercranestyle said:
sorry for the late reply. not always here.
1. did you unlock the bootloader again before doing all of this?
2. list the files that are in your platform-tools folder.
3. when you executed the "flash-all" command earlier, you did do it with the dash in between flash and all... right? also, you're doing it without the quotation marks, right?
sorry if they seem silly. just never really know.
Click to expand...
Click to collapse
Neither am I , I just got back from a trip. I have the fastboot exe adb exe mfastboot exe the ADB api files, and the ROMs I tried to sideload along with all the images I pushed to the device.
Originally I had the bootloader unlocked, like I said I was being a fool blindly following a tutorial to get back to stock and I locked it too soon.
Yeah, I tried flash-all flash all and flash flash-all / flash flash all

dontbeweakvato said:
The flash all command doesn't work because the extracted tar file has A zipped folder inside that has to be extracted also with radio and I think recovery zipped up. You have to extract those two files to put them in the tar file and then you might be able to flash all. But as long as you can fastboot devices you should be able to flash all 6 files and have a brand new device.
Click to expand...
Click to collapse
Okay I unzipped that folder and put all the files in the fastboot folder, I still get the same error. The thing that scares me here is I can use the batch file now and it just gives me an error saying it can't flash because it's bootloader is locked.

Soulfly3 said:
just an unrelated question... why did you lock the bootloader again? what was the purpose?
also, as mentioned... locked bootlader, odds arre USB debugging and OEM unlock are also not checked.... afaik, youre in trouble... hopefully someone else can sav you, im out of ideas
Click to expand...
Click to collapse
They are default unchecked, hence the reason I can't unlock the bootloader again. I said it in my first post, I was being a fool following some guide to get back to stock and ******* up a step.

rift999 said:
He can't unlock the bootloader without booting into a rom. He needs to use twrp to flash a full system but I am not sure how to help with that when he can't sideload.
Click to expand...
Click to collapse
Is there not a way to fix the sideload? Or a way to get my computer to read it as a media devices so I can transfer files or something? It's always worked with previous phones but my computer reads the 6P differently. (even when it was working)

Stop trying to fastboot flash anything, it will not work as I've already started multiple times. The only option you have is to get something moved to storage and flash it from twrp.

akellar said:
Stop trying to fastboot flash anything, it will not work as I've already started multiple times. The only option you have is to get something moved to storage and flash it from twrp.
Click to expand...
Click to collapse
I've tried every driver from Google and Nexus 6P, I can't get it to read the MTP for a file transfer, what would you suggest I do? it doesn't show up as my old phones used to in the computers drives.
I have found 0 success with getting a file on through file transfer or ADB push file.

-MotoNexus- said:
I've tried every driver from Google and Nexus 6P, I can't get it to read the MTP for a file transfer, what would you suggest I do? it doesn't show up as my old phones used to in the computers drives.
I have found 0 success with getting a file on through file transfer or ADB push file.
Click to expand...
Click to collapse
Can't help too much personally, but you might give this a shot:
http://forum.xda-developers.com/showpost.php?p=64317181&postcount=20
Sent from my Nexus 6P using XDA Free mobile app

So I just got it............!!!!! I have spent a total of 16 hours with videos, forums and trial and error. When I was going back the 5th around time messing with drivers I turned my ADB driver into a USB composite because I had no idea I could and instantly I was able to file transfer!!!! Problem solved, I have my ROM on now.
Thank you all for your help! I am so sorry I derped at this, I have been doing this a long time and just got sloppy.

R1HD update 6.6 AND 7.4.2 bootloader ROLL-BACK Instructions

This is FINAL working method.
First off you must unlock bootloader, and install twrp.
instructions for unlock bootloader are in this thread
http://forum.xda-developers.com/r1-...mazon-root-t3490882/post69387472#post69387472
I made many cycles between 6.6 and 6.1 and found that this set of files was minimum needed to maintain stable device. I started with only the preloader, and that left the phone able to connect to spft but the preloader was o longer in the "trusted zone" so it would not load the second step of power on (lk). replaceing the lk with spft after that allowed to boot to the boot menu, but would not trust the next step(boot.img). But with the preloader and lk I was able to fastboot, so was able to oem unlock.. this was the first method I was going to suggest. After more trials I decided it better to foll back all the bin files that the update replaced and also the secret bin so no more need to oem unlock after the roll back.
I got so comfortable moving between preloaders and version I got careless. My carelessness allowed me to mix up secure preloader and bin files with custom non secure recovery files and without realizing it I rebooted like that. I was left in a secure environment that was panicking because the recovery was not properly signed. (a terminal soft-brick)
My point is once you roll back DO NOT go back to locked and DO NOT blame me if you forget and restore some backup that does that to you down the road.
I do recomend that you roll back though. Because with the roll back, you are almost certain not able to brick because you can always use spft to to fix things.
THIS WILL ROLL BACK BOOT LOADER AND ALLOWS SPFT .
THIS HAS ONLY BEEN RUN WITH TWRP.
But the fastboot mode can also flash preloader if prefered. Just remember you may also need to oem unlock again after. This has not and will not be tested by me.
ONCE YOU HAVE UNLOCKED BOOTLOADER AND INSTALLED TWRP, return here and download "after_bootloader_roll_back_5.tar" unpack the tar and run the .bat file. It will adb push the recovery image to you phone and then install it.
It will rewrite :
1. preloader
2. lk (little kernel)
3. boot img
4. seccfg.bin
5. frp (to make sure bootloader remains unlockable)
6. trustzone (goes into both TEE1 and TEE2
7. secro.bin
All done.
If you failed to follow the warning and tried without a valid backup here is a link my zero-day backup. It will bring you back to 6.1 and you will need to unlock and root all over again. Good news is that this time you can do it with spft https://drive.google.com/open?id=0ByJNKJ8bGC50Vzg5QjJXS3VjcTQ

Hi, I follow all steps and now my R1HD its in a loop at the first screen (BLU BOLD LIKE US ...). Before that, my cellphone and twrp working well. what can I do?

jhonjahegu said:
Hi, I follow all steps and now my R1HD its in a loop at the first screen (BLU BOLD LIKE US ...). Before that, my cellphone and twrp working well. what can I do?
Click to expand...
Click to collapse
Sounds like you need to do oem unlock again. That is what the first methods needed.
Did you use the current downloaded roll back 5.tar file or one of the earlier ones?
Start with these instructions.
1. Hold volume up while phone is boot looping.
2. Select fastboot mode
3. Open terminal or Windows command window and type "fastboot getvar all"
4. Near the end of the output check for these entries.
Unlock=yes
Secure=no
5. If not these values do "fastboot oem unlock"
6. If need to do oem unlock you will also need to "fastboot format userdata"

The script did not work. It just boot loops and I do have: Unlock=yes and Secure=no

mrmazak said:
Sounds like you need to do OEM unlock again. That is what the first methods needed.
Did you use the current downloaded roll back 5.tar file or one of the earlier ones?
Start with these instructions.
1. Hold volume up while phone e is boot looping.
2. Select fastboot mode
3. Open terminal or Windows command window and type "fastboot getvar all"
4. Near the end of the output check for these entries.
Unlock=yes
Secure=no
5. If not these values do "fastboot OEM unlock"
6. If need to do OEM unlock you will also need to "fastboot format userdata"
Click to expand...
Click to collapse
digihaven said:
The script did not work. It just boot loops and I do have: Unlock=yes and Secure=no
Click to expand...
Click to collapse
If it is looping into twrp then you must do step 6 from above.

I run this with TWRP installed, and it turns off my phone , it disconnects my device, it turns back on, reconnected, then it disconnects again and never reconnects it so I cant send any commands or the like. Does anyone know a solution to this?

clownkitty said:
I run this with TWRP installed, and it turns off my phone , it disconnects my device, it turns back on, reconnected, then it disconnects again and never reconnects it so I cant send any commands or the like. Does anyone know a solution to this?
Click to expand...
Click to collapse
Need more details please.
Like when it comes back on is it on in twrp screen.?
Did you unpack the rar into one folder, leaving the zip file zipped, and run the batch from the folder with the zip in it?
You can also just copy the zip file onto phone and install it in twrp.

mrmazak said:
Need more details please.
Like when it comes back on is it on in twrp screen.?
Did you unpack the rar into one folder, leaving the zip file zipped, and run the batch from the folder with the zip in it?
You can also just copy the zip file onto phone and install it in twrp.
Click to expand...
Click to collapse
Turns out that I'm just having a lot more issues than i thought, i cant get it to the TWRP screen, though I used the method from https://forum.xda-developers.com/r1-hd/how-to/blu-r1-hd-v6-6-dirtycowed-f-amazon-root-t3490882/ and tried manually flashing the recovery file from https://forum.xda-developers.com/r1-hd/development/prime-stock-rom-6-5-flashed-via-twrp-t3455532
If I do adb reboot recovery, it just gives my a screen with a maintenance android logo with the text "no command."
I did just unpack the rar, and leave the zip file zipped as well

clownkitty said:
Turns out that I'm just having a lot more issues than i thought, i cant get it to the TWRP screen, though I used the method from https://forum.xda-developers.com/r1-hd/how-to/blu-r1-hd-v6-6-dirtycowed-f-amazon-root-t3490882/ and tried manually flashing the recovery file from https://forum.xda-developers.com/r1-hd/development/prime-stock-rom-6-5-flashed-via-twrp-t3455532
If I do adb reboot recovery, it just gives my a screen with a maintenance android logo with the text "no command."
I did just unpack the rar, and leave the zip file zipped as well
Click to expand...
Click to collapse
You needed to hold power and volume up when restarting from fastboot during the procedure. [[ I maybe should have more comments in the script. The 6.6 update replaced the lk.bin(in has the fastboot, gaming other things). The replaced version got rid of "fastboot reboot", so when my script issues that command with the updated lk the phone just does nothing.]]. Then from the boot menu load directly into recovery or else the stock recovery gets replaced, like what you have.
Also check that the unlock part worked for you by doing "fastboot getvar all" from fastboot mode. Verify you have "unlock: yes"
If so try again to get recovery flashed,

mrmazak said:
You needed to hold power and volume up when restarting from fastboot during the procedure. [[ I maybe should have more comments in the script. The 6.6 update replaced the lk.bin(in has the fastboot, gaming other things). The replaced version got rid of "fastboot reboot", so when my script issues that command with the updated lk the phone just does nothing.]]. Then from the boot menu load directly into recovery or else the stock recovery gets replaced, like what you have.
Also check that the unlock part worked for you by doing "fastboot getvar all" from fastboot mode. Verify you have "unlock: yes"
If so try again to get recovery flashed,
Click to expand...
Click to collapse
I didn't realize you had to load straight into recovery mode after flashing it, I got it to work now, thank you so much!

Hi,
I'm on version 7.4.2 and do unlock bootloader. And then rollback but now I have a problem with mobile data.
I can't use mobile data anymore I already check and APN are Ok.
Phone reboot some times and change some sim but have the same problem.

tuespazio said:
Hi,
I'm on version 7.4.2 and do unlock bootloader. And then rollback but now I have a problem with mobile data.
I can't use mobile data anymore I already check and APN are Ok.
Phone reboot some times and change some sim but have the same problem.
Click to expand...
Click to collapse
I do not have an answer for you, bit didn't want you to think you are ignored. Nobody else has had this problem before,

mrmazak said:
I do not have an answer for you, bit didn't want you to think you are ignored. Nobody else has had this problem before,
Click to expand...
Click to collapse
Hi, dont worry now is fixed i return to 6.1 and then flash full 6.5 firmware.
Data is now working fine .
Thanks for your Support

sorry, wrong thread

ncy1 said:
Hi guys, sorry to bother you with this
I was on 6.0 rooted and without ads, i just tried to update my phone using the v17 and settings on this thread, when i went to cellphone info on settings it said i was still on 6.0. Did i miss something or this a normal thing? Anyway, i went back to recovery mode, did a wipe and tried to flash the 7.4.2 rom but it sent me an error, now the phone won't boot and gets stuck on the blu loadscreen.
Click to expand...
Click to collapse
Don't get me wrong, I feel bad for you that your phone is in this situation, but that has nothing to do with the thread you are posting in.
This thread is for rolling back the preloader.
And all the oem and Amazon Roms are 6.0
To get help you should post in the thread you got the ROM from.
And include the error you got.

mrmazak said:
If you failed to follow the warning and tried without a valid backup here is a link my zero-day backup. It will bring you back to 6.1 and you will need to unlock and root all over again. Good news is that this time you can do it with spft https://drive.google.com/open?id=0ByJNKJ8bGC50Vzg5QjJXS3VjcTQ
Click to expand...
Click to collapse
I think I just want to try this method, since I want to convert it to OEM and still keep OTA updates anyway. I'm blanking though as to how I need to go about this.
I have adb installed, and I have access. I assume this requires a fastboot command, but I don't know which.

Jessooca said:
Mrmazak... does this work on a new out of the box blu r1 that came with the 6.6 August update already installed?
I'm trying to help a friend, I surprisingly can't get the bootloader unlocked, dirtycow continually failed.
He doesn't care about updates etc... just wanted to flash the no ads firmware onto a prime version blu r1 hd
Click to expand...
Click to collapse
To the best of my knowledge it was.
Last time someone told me they were having trouble, they ran the codes manually one by one instead of using the script, and it worked. Apparently they had trouble pushing the files from the batch file. I had similar trouble when I wrote the script, that is why there are 3 second pauses ,that seemed to fix it for me. I will change them to 10 seconds and see if it helps.
I will update here when I change it then you candownload again and try, or you can make the changes yourself and let the me know
OK i updated the one-click.bat . you can download it again to see if that help. Also you said dirty-cow keeps failing, please let me know the fail message and also the comments displayed during the first part of the script. the part that is pushing files.
Also I have not been able to get feedback on the one-click.sh for linux. I don't normally use linux and did not test the shell. If you are using that one maybe the fail is my poorly written .sh

mrmazak said:
Sounds like you need to do OEM unlock again. That is what the first methods needed.
Did you use the current downloaded roll back 5.tar file or one of the earlier ones?
Start with these instructions.
1. Hold volume up while phone e is boot looping.
2. Select fastboot mode
3. Open terminal or Windows command window and type "fastboot getvar all"
4. Near the end of the output check for these entries.
Unlock=yes
Secure=no
5. If not these values do "fastboot OEM unlock"
6. If need to do OEM unlock you will also need to "fastboot format userdata"
Click to expand...
Click to collapse
Hi, I'm also stuck on the "BLU Bold like us" loop. When I try to do the "fastboot OEM unlock" I get a list of possible commands but it doesn't perform de OEM unlock... Can you help me please? Thanks

danbcooper said:
Hi, I'm also stuck on the "BLU Bold like us" loop. When I try to do the "fastboot OEM unlock" I get a list of possible commands but it doesn't perform de OEM unlock... Can you help me please? Thanks
Click to expand...
Click to collapse
"oem" is not supposed to be capitalized
i went back and edited that original post too.

mrmazak said:
"oem" is not supposed to be capitalized
i went back and edited that original post too.
Click to expand...
Click to collapse
Now I ran "fastboot oem unlock" and it says FAILED (remote: unknown command). Do you know why?
Never mind.. Tried again and worked! Thanks for everything!

Phones in a bit of a state

Hey guys,
Yesterday I tried, after a few months of not modding my phone, to update my recovery as i was running a very old version of TWRP. Long story short I did something wrong somewhere and my phone has ended up in a bit of a weird state.
At the moment the OS is BlissRom, however it fails to boot. The loading screen runs very slowly and never actually boots the OS. The current recovery is the stock recovery.
The thing that is giving me an issue is the fact that somehow the bootloader has locked, so I am unable to flash a new OS onto my phone. I'm not able to flash anything onto my phone as it throws an error telling me the phone is locked.
Overall I aren't able to boot into the OS, however I have access to the stock recovery and fastboot. Unfortunately it looks as though the bootloader has locked some how.
Any ideas how I can fix this, or have I completely messed my phone up?
Thanks in advance.

Hi
U said u were running twrp before which means u have unlocked bootloader and flash roms already.
How did u end up with stock recovery?
Also is it phone being detected bycur PC?
Sent from my ONE A2005 using Tapatalk

I believe it was a result of running the QualComm restoration tool. I ran this and it didn't look as though it did anything however after i rebooted into recovery I found it was stock.
I'm not sure if using this tool also re locked the bootloader however as it appears to be locked and I cant flash anything in fastboot mode.

colinbest2 said:
I believe it was a result of running the QualComm restoration tool. I ran this and it didn't look as though it did anything however after i rebooted into recovery I found it was stock.
I'm not sure if using this tool also re locked the bootloader however as it appears to be locked and I cant flash anything in fastboot mode.
Click to expand...
Click to collapse
Did u also tried command fastboot oem unlock
Sent from my ONE A2005 using Tapatalk

Indeed I have, I get an error saying "phone is locked".
I think the resolution will be running the restoration tool fully but i cant seem to get it to do anything. It just sits there with no progress bars appearing.
Have you ever had any experience with this tool?

No I never used recovery tools.
Can u at any point let's say u boot into recovery and connect the device to PC, will it detected the internal storage?
Sent from my ONE A2005 using Tapatalk

Unfortunately not, if I boot the OS it gets stuck at the loading animation, it isn't a bootloop oddly enough.
Booting in recovery the PC doesn't detect the internal storage, however if I choose "Update from USB" I can see that ADB detects my phone in sideload mode.
Much like in fastboot mode I can see my PC detects my phone in fastboot mode.
I do have some OS zips on the internal storage which I have tried flashing in stock recovery, however these always result in "Install failed" errors.

Dude i think you have to use recovery tool now
Here is the link first read carefully https://forums.oneplus.net/threads/...ck-guide-for-a-hard-bricked-oneplus-2.347607/

Thanks for the link buddy.
I've gone through this thread, I think the issue preventing this from working for me is the fact that although I have installed the relevant drivers, when I plug my phone into my PC the drivers assigned to it are "Android Bootloader Interface". When I try to target another driver, using the Update driver functionality it just refuses to change, saying the driver already assigned is the newer one.
Any ideas how I can get around this? I know ideally it should appear as Qualcomm 9008. I've tried all the methods in the "How to Make the device show as Qualcomm 9008" section without any success.

colinbest2 said:
Unfortunately not, if I boot the OS it gets stuck at the loading animation, it isn't a bootloop oddly enough.
Booting in recovery the PC doesn't detect the internal storage, however if I choose "Update from USB" I can see that ADB detects my phone in sideload mode.
Much like in fastboot mode I can see my PC detects my phone in fastboot mode.
I do have some OS zips on the internal storage which I have tried flashing in stock recovery, however these always result in "Install failed" errors.
Click to expand...
Click to collapse
Here's what to do...
U will need to sideload the stock rom which can be downloaded from here: https://s3.amazonaws.com/oxygenos.o...4_OTA_020_all_1608262242_44a55e674a2b4bf6.zip
-Place the zip in ur adb folder and rename it to update.zip.
-Connect the Oneplus2 to the PC with USB cable and open a command prompt or terminal on your PC. To do this open the ADB folder press shift + right click and click on open command here.
-Reboot to recovery and select install from usb.
-Flash the OxygenOS on OnePlus 2 by typing:
adb sideload update.zip
-Now the update will start and this will take some time.
Hope it helped[emoji106]
Sent from my ONE A2005 using Tapatalk

Brandon Indar said:
Here's what to do...
U will need to sideload the stock rom which can be downloaded from here: https://s3.amazonaws.com/oxygenos.o...4_OTA_020_all_1608262242_44a55e674a2b4bf6.zip
-Place the zip in ur adb folder and rename it to update.zip.
-Connect the Oneplus2 to the PC with USB cable and open a command prompt or terminal on your PC. To do this open the ADB folder press shift + right click and click on open command here.
-Reboot to recovery and select install from usb.
-Flash the OxygenOS on OnePlus 2 by typing:
adb sideload update.zip
-Now the update will start and this will take some time.
Hope it helped[emoji106]
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
Hey dude, thanks for the help! So I went through these steps and it actually appeared to sideload and update properly.
However now it looks as though my phone is stuck at the one+ logo when I go to boot the OS.

colinbest2 said:
Hey dude, thanks for the help! So I went through these steps and it actually appeared to sideload and update properly.
However now it looks as though my phone is stuck at the one+ logo when I go to boot the OS.
Click to expand...
Click to collapse
Try this one :
https://s3.amazonaws.com/oxygenos.o...4_OTA_019_all_1606041303_bd42fc5cc5cc4ab2.zip
If still stuck on boot logo, boot in fastboot, connect to PC and run command : fastboot erase userdata
If not work try sideload a rom u have with same steps[emoji4]
Sent from my ONE A2005 using Tapatalk

Lg v20 h91820h t-mobile bootloader cannot be unlocked - android 8 oreo

UPDATE:
I successfully unlocked the bootloader, flashed twrp, rooted, updated kernel and roms, tweaking gpu cpu for performance in pubg etc, greenify, flashify, power nap everything.
xposed framework take you in bootloop for this device.
now i am on kernel mk2000, superv20 rom, h91810u, 7 nougat.
if in future anyone feels any problem i am always here.
remember: linus is your friend for this device, and windows 10 suck.
and
sudo $(which fastboot) did miracles for me....
old post:
Hello everyone.
i am new here and i am sorry in advance if i did something wrong. i will come directly to the point.
model number: LG V20 T-MOBILE VERSION, H91820H, NON USA, Currently on oreo android 8.
we are not talking about any kind of roms kernels roots or anything here. just a simple question. " can this model's boot loader be unlocked ? like ever ? or not "
cause i have tried everything, when i say everything i mean everything. followed several posts on internet videos on you tube posts on XDA, tried using multiple PCs, multiple data cables, multiple drivers but for some reason i don't know what, this model's boot loader cannot be unlocked.
THE ERROR:
<WAITING FOR DEVICE> till eternity.
what i have done till now ?
1. lg drivers installed.
2. adb drivers installed with adb fastboot files.
3. updating legacy android adb interface driver, done.
4. went in to boot loader then connected the data cable and updated driver, done.
5. usb debugging oem unlock options activated, done.
6. restarted pc multiple times to update drivers, done.
we all know all it takes is 3 easy commands to unlock bootlaoder
adb reboot bootloader
fastboot oem unlock
fastboot reboot
but in my case i always stuck at 2nd command. waiting for device is shown and nothing happens.
then i ran command, adb devices>> it shows
List of devices attached
adb server is out of date. killing...
* daemon started successfully *
LGH9182bfc6bdc device
next i put the command, fastboot devices and nothing is shown i just go to the next line... c:\adb>
so this is for sure that my device is not connected to the fastboot.
now my only question is, can this device bootloader unlock or not ? so that i stop pushing my limits.
any help will be appreciated.
regards.

X_BlackBurn_X said:
Hello everyone.
i am new here and i am sorry in advance if i did something wrong. i will come directly to the point.
model number: LG V20 T-MOBILE VERSION, H91820H, NON USA, Currently on oreo android 8.
we are not talking about any kind of roms kernels roots or anything here. just a simple question. " can this model's boot loader be unlocked ? like ever ? or not "
cause i have tried everything, when i say everything i mean everything. followed several posts on internet videos on you tube posts on XDA, tried using multiple PCs, multiple data cables, multiple drivers but for some reason i don't know what, this model's boot loader cannot be unlocked.
THE ERROR:
<WAITING FOR DEVICE> till eternity.
what i have done till now ?
1. lg drivers installed.
2. adb drivers installed with adb fastboot files.
3. updating legacy android adb interface driver, done.
4. went in to boot loader then connected the data cable and updated driver, done.
5. usb debugging oem unlock options activated, done.
6. restarted pc multiple times to update drivers, done.
we all know all it takes is 3 easy commands to unlock bootlaoder
adb reboot bootloader
fastboot oem unlock
fastboot reboot
but in my case i always stuck at 2nd command. waiting for device is shown and nothing happens.
then i ran command, adb devices>> it shows
List of devices attached
adb server is out of date. killing...
* daemon started successfully *
LGH9182bfc6bdc device
next i put the command, fastboot devices and nothing is shown i just go to the next line... c:\adb>
so this is for sure that my device is not connected to the fastboot.
now my only question is, can this device bootloader unlock or not ? so that i stop pushing my limits.
any help will be appreciated.
regards.
Click to expand...
Click to collapse
Are you following this > https://r.tapatalk.com/shareLink/to...3&share_fid=3793&share_type=t&link_source=app
[ROOT] - lafsploit - H918 (any version up to and including 20h) - now n00b friendly
Sent from my HD1907 using Tapatalk

Thanks for thanks for replying on a short notice I have seen this post there is no reason to follow any of the post because the very first stage is to unlock the bootloader but as I cannot unlock the bootloader there is no point in following any of the posts my problem is what ever way I follow I am unable to to unlock the bootloader in fact what I can see is whenever I try to type in command ADB devices IC e my phone but when I type fastboot devices nothing happens it's like my phone is not in the fastboot that is why why I cannot unlock the bootloader I have tried every possible step mentioned on the internet and on various forums I also go through some videos on YouTube those guys follow the same steps and unlock their bootloader but my device cannot unlock for some reason so if you lovely people can help me out and figure out what exactly I am doing wrong as I have followed every step of unlocking the bootloader I've installed all the drivers I have updated all the drivers I have done exactly e all three steps which has been asked but still no luck thank you

clsA said:
Are you following this > https://r.tapatalk.com/shareLink/to...3&share_fid=3793&share_type=t&link_source=app
[ROOT] - lafsploit - H918 (any version up to and including 20h) - now n00b friendly
Sent from my HD1907 using Tapatalk
Click to expand...
Click to collapse
To be very precise after following the first step while unlocking the bootloader in the second step when we type fast boot devices it should show some hexadecimal numbers and it should confirm us that our device is in the fastboot mode but in my case whenever I type this command nothing happens that means my device is not recognised to go in the bootloader this is the main problem there is no point in following any of the posts if you cannot complete the very first stage of unlocking your bootloader if you can figure out what exactly is the problem I will be thankful to you because I have followed every step possible I've updated every ADB drivers LG drivers but nothing is helping out as even before starting the procedure of unlocking the bootloader my device is not going in the fast boot also I noticed one thing when I try to go inside the bootloader screen before that in my device manager it is shown as composit device but after that I think it gets disconnected fastboot oem unlock cannot work as it gives a message of waiting for the device after going are using the command ADB reboot bootloader so my problem is the command fastboot oem unlock is pretty useless as it waits for the device and it's stuck there forever please help me out if you can I will be thankful to you regards

X_BlackBurn_X said:
To be very precise after following the first step while unlocking the bootloader in the second step when we type fast boot devices it should show some hexadecimal numbers and it should confirm us that our device is in the fastboot mode but in my case whenever I type this command nothing happens that means my device is not recognised to go in the bootloader this is the main problem there is no point in following any of the posts if you cannot complete the very first stage of unlocking your bootloader if you can figure out what exactly is the problem I will be thankful to you because I have followed every step possible I've updated every ADB drivers LG drivers but nothing is helping out as even before starting the procedure of unlocking the bootloader my device is not going in the fast boot also I noticed one thing when I try to go inside the bootloader screen before that in my device manager it is shown as composit device but after that I think it gets disconnected fastboot oem unlock cannot work as it gives a message of waiting for the device after going are using the command ADB reboot bootloader so my problem is the command fastboot oem unlock is pretty useless as it waits for the device and it's stuck there forever please help me out if you can I will be thankful to you regards
Click to expand...
Click to collapse
Did you downgrade to software version H91810P? Because that should be the first thing you have to do to get everything else to work afterwards.

C D said:
Did you downgrade to software version H91810P? Because that should be the first thing you have to do to get everything else to work afterwards.
Click to expand...
Click to collapse
Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.
I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.
This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.
I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.

X_BlackBurn_X said:
Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.
I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.
This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.
I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.
Click to expand...
Click to collapse
fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices
Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP
Example:
D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device
D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot oem device-id
...
(bootloader) ----------------------------------
(bootloader) Device-ID
(bootloader) F3D7DE171C893D55082EAE38270125EF
(bootloader) DA7CB3E78B1DB5709A2CA8********
(bootloader) ----------------------------------
OKAY [ 0.060s]
finished. total time: 0.060s
D:\fastboot>fastboot reboot
rebooting...
finished. total time: 0.008s
D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot getvar unlocked
unlocked: no
finished. total time: 0.003s
Click to expand...
Click to collapse

X_BlackBurn_X said:
Thanks for the reply.
Can you please clear me one thing. To downgrade from h91820h to h91810p you need to unlock bootloader if i am not wrong. And in that case we will be back to square 1.
Its not about installing custom rom kernel recovery root or anything. Its only about unlocking the bootloader which i cannot do.
I hope you understand my pain.
I just want to unlock my bootloader thats it.
It used only 3 commands.
1. Adb devices - shows my device.
2. Fastboot devices - no fastboot device found.
This is the problem. When you cannot find any fastboot device even updating driver by going inside the bootloader the entire mission gets failed.
I cant find any solution for this. I dont know for what reason my device cannot be listed in fastboot mode.
Click to expand...
Click to collapse
As clsA said, flashing firmware does not require an unlocked bootloader.
Look at parts 1 and 2 of the other step by step guide here:
https://forum.xda-developers.com/v20/how-to/step-step-guide-lg-v20-h918-unlocking-t3808258

clsA said:
fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices
Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP
Example:
Click to expand...
Click to collapse
Thanks for the solution. May be this is it. All the time i have been doing it wrong.
Solution : flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP.
I will downgrade from 20h to 10p now and will give you feedback on this soon. Thanks a ton for showing a noob like me the right direction to work.

X_BlackBurn_X said:
Thanks for the solution. May be this is it. All the time i have been doing it wrong.
Solution : flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP.
I will downgrade from 20h to 10p now and will give you feedback on this soon. Thanks a ton for showing a noob like me the right direction to work.
Click to expand...
Click to collapse
No problem the link @C D posted above seems to have all the working links for you

clsA said:
No problem the link @C D posted above seems to have all the working links for you
Click to expand...
Click to collapse
well we have a new problem now.
lgup error 0x2bc invalid command response code = 0x80000202 at 4 percent while flashing.
did i just brick my phone now ? as it says dont unplug until you are done and we have been getting same error again and again.
used the provided kdz file flashing as an upgrade.

ok so the new problem is... may be i was trying to flash h91810p naugaut on to a oreo h91820h
and if i am not wrong at this stage i messed up pretty bad my phone is stuck in donwload mode wont boot up and i need to flash back 20h again to get out of this mess. can anyone hlp me ....
i just wanna know h91810p downgrading from 91820h is possible or not ? cause one is naugaut and one is oreo.

UPDATE:
i was flashing wrong h91810p thats why it was showing error. on another website i got the file compatible to my phone t mobile version and flash was successful.
now i am on h91810p software version andriod 7.
problem UPDATE:
i still cant unlock bootloader. same problem as before downgrading from h91820h.
adb devices shows device.
adb reboot bootloader
fastboot devices gives no result.
phone cannot enter in fastboot mode. the problem still remains the same even after changing the software.
kindly help guys

clsA said:
fastboot doesn't work when the phone is booted up
adb reboot bootloader
followed by fastboot devices
Note: flashing the 10p kdz does not require the bootloader be unlocked
it requires you have patched LGUP
Example:
Click to expand...
Click to collapse
hello clsA
"
D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device
D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot oem device-id
after this it only says waitng for device"
now i am on h91810p as i was instructed. can you please help.
its all happening the same way it was happening when was on h91820h.
fastboot devices cannot be found.
once it reboots in bootloader then it should detect a fastboot device but it doesnot and adb is also lost there.
kindly help.

NEW UPDATE:
my lg v20 now on software h91810p is actually a T MOBILE version. and when i researched more about it i found out T MOBILE deliberately locks the boot loader of many devices and its unlockable.
possible work around can be if the software version installed on your phone can some how be an international version of your ROM, then only you can unlock the bootloader else none of your commands will work. now i am trying to flash this phone using an international ROM version if i succeed i will update. but according to my knowledge flashing other roms other than t mobile ones will definitely give errors in LGUP.

X_BlackBurn_X said:
NEW UPDATE:
my lg v20 now on software h91810p is actually a T MOBILE version. and when i researched more about it i found out T MOBILE deliberately locks the boot loader of many devices and its unlockable.
possible work around can be if the software version installed on your phone can some how be an international version of your ROM, then only you can unlock the bootloader else none of your commands will work. now i am trying to flash this phone using an international ROM version if i succeed i will update. but according to my knowledge flashing other roms other than t mobile ones will definitely give errors in LGUP.
Click to expand...
Click to collapse
Do not flash another model's firmware onto the H918! Doing so will permanently brick your phone. The H918 in particular is incompatible with all other variants' software. Also, flashing H918 firmware onto any other model will also brick that phone.

C D said:
Do not flash another model's firmware onto the H918! Doing so will permanently brick your phone. The H918 in particular is incompatible with all other variants' software. Also, flashing H918 firmware onto any other model will also brick that phone.
Click to expand...
Click to collapse
hello
thanks for the reply.
i know we cannot flash any other phones firmware on to this model.
i was thinking of flashing specifically lg v20 h91810p international stock firmware, one is t mobile and one is international stock rom of same model.
cause t mobile is not allowing me to unlock the bootloader but an international stock rom will.
i have seen people doing on t mobile on youtube videos i dont know how they are doing it.
my problem is :
" as in message sent to various senior on this topic"
LG V20 H91810P, T MOBILE BOOTLOADER CANNOT BE UNLOCKED
HELLO
can you please help me out on a quest to unlock my bootloader of lg v20 h91810p. i have downgraded from h91820h to h91810p and still all the adb commands fail to make my phone go in to fastboot mode. i just cannot enter in fastboot mode,
adb devices shows my device
|but fastboot devices in bootloader mode doesnot show my device at all.
updated all the drivers used multiple pcs usb ports but no luck at all.,
what am i possibly doing wrong can you please help me out? i will be thankful to you.
on a side note i think t mobile has lockedd my bootloader so that i canoot unlock it,
regards

X_BlackBurn_X said:
hello
thanks for the reply.
i know we cannot flash any other phones firmware on to this model.
i was thinking of flashing specifically lg v20 h91810p international stock firmware, one is t mobile and one is international stock rom of same model.
cause t mobile is not allowing me to unlock the bootloader but an international stock rom will.
i have seen people doing on t mobile on youtube videos i dont know how they are doing it.
my problem is :
" as in message sent to various senior on this topic"
LG V20 H91810P, T MOBILE BOOTLOADER CANNOT BE UNLOCKED
HELLO
can you please help me out on a quest to unlock my bootloader of lg v20 h91810p. i have downgraded from h91820h to h91810p and still all the adb commands fail to make my phone go in to fastboot mode. i just cannot enter in fastboot mode,
adb devices shows my device
|but fastboot devices in bootloader mode doesnot show my device at all.
updated all the drivers used multiple pcs usb ports but no luck at all.,
what am i possibly doing wrong can you please help me out? i will be thankful to you.
on a side note i think t mobile has lockedd my bootloader so that i canoot unlock it,
regards
Click to expand...
Click to collapse
Did you make the Linux USB boot stick
Are you following the guide at all?
PART 3: CREATING A BOOTABLE LINUX USB USING FWUL
DOWNLOAD FWUL_v2.7_x86_64_15GB.zip FROM THE LINK BELOW AND EXTRACT THE IMAGE FILE SOMEWHERE IN YOUR PC.
https://androidfilehost.com/?w=files&flid=214529
DOWNLOAD RUFUS FROM BELOW AND INSTALL
https://rufus.akeo.ie/
INSERT A PEN DRIVE IN YOUR PC AND RUN RUFUS.
INSIDE RUFUS SELECT THE IMAGE FILE AND SELECT START (AFTER SELECTING START SELECT DD MODE IN THE DIALOGUE BOX) TO CREATE A BOOTABLE PEN DRIVE (WARNING: THIS WOULD FORMAT YOUR PEN DRIVE)
NOW YOU SHOULD BOOT YOUR PC FROM THE BOOTABLE USB STICK WHICH YOU HAVE JUST CREATED
THIS WOULD MAKE YOUR PC RUN LINUX OS
TYPE PASSWORD AS linux AND ENTER
Sent from my HD1907 using Tapatalk

clsA said:
Did you make the Linux USB boot stick
Are you following the guide at all?
PART 3: CREATING A BOOTABLE LINUX USB USING FWUL
DOWNLOAD FWUL_v2.7_x86_64_15GB.zip FROM THE LINK BELOW AND EXTRACT THE IMAGE FILE SOMEWHERE IN YOUR PC.
https://androidfilehost.com/?w=files&flid=214529
DOWNLOAD RUFUS FROM BELOW AND INSTALL
https://rufus.akeo.ie/
INSERT A PEN DRIVE IN YOUR PC AND RUN RUFUS.
INSIDE RUFUS SELECT THE IMAGE FILE AND SELECT START (AFTER SELECTING START SELECT DD MODE IN THE DIALOGUE BOX) TO CREATE A BOOTABLE PEN DRIVE (WARNING: THIS WOULD FORMAT YOUR PEN DRIVE)
NOW YOU SHOULD BOOT YOUR PC FROM THE BOOTABLE USB STICK WHICH YOU HAVE JUST CREATED
THIS WOULD MAKE YOUR PC RUN LINUX OS
TYPE PASSWORD AS linux AND ENTER
Sent from my HD1907 using Tapatalk
Click to expand...
Click to collapse
thanks again for the showing me the right direction. i was talking about unlocking the bootloader in step 1.
i will go through your links and try to study this.
just one more question.
does this method unlocks the bootloader ?
if yes please reply yes i will be thankful to you.
i will follow this step now.
regards

X_BlackBurn_X said:
hello clsA
"
D:\fastboot>adb devices
List of devices attached
LGUS99740047103 device
D:\fastboot>adb reboot bootloader
D:\fastboot>fastboot oem device-id
after this it only says waitng for device"
now i am on h91810p as i was instructed. can you please help.
its all happening the same way it was happening when was on h91820h.
fastboot devices cannot be found.
once it reboots in bootloader then it should detect a fastboot device but it doesnot and adb is also lost there.
kindly help.
Click to expand...
Click to collapse
Why does adb show your device as a 997 which is the Sprint variant
Sent from my LG-H910 using XDA Labs

Custom Rom / rooting Options vor TB-125FU (Lenovo Tab M10 Plus 3rd Gen)

Hey everyone,
I've been looking for options to Install a custom Rom or root since I bought the Tablet several month ago. It seems like there are some options for the Full Hd Version, but I have a hard time finding anything useful for the 125FU. Are there any recommendations like compatible GSI roms or TWRP/magisk?
Thanks in advance for your help!

You should just be able to install matiek form my understanding

I need some information, too. Bootloader unlock is different. Device doesn't respond to bootloader commands with Minimal ADB Fastboot 1.4.3.

holmesmalone said:
I need some information, too. Bootloader unlock is different. Device doesn't respond to bootloader commands with Minimal ADB Fastboot 1.4.3.
Click to expand...
Click to collapse
I just got an tb125fu
Bootloader unlock was no problem, maybe it works for you now with the latest versions?

art99 said:
I just got an tb125fu
Bootloader unlock was no problem, maybe it works for you now with the latest versions?
Click to expand...
Click to collapse
The issue I had, and resolved, was the lack of the latest fastboot drivers. Gained root with Magisk successfully.

holmesmalone said:
The issue I had, and resolved, was the lack of the latest fastboot drivers. Gained root with Magisk successfully.
Click to expand...
Click to collapse
I installed corvus os gsi on it. i have no custom recovery.

peteonu said:
I installed corvus os gsi on it. i have no custom recovery.
Click to expand...
Click to collapse
TWRP is convenient, but not absolutely necessary. Would like a Lineage rom though.

holmesmalone said:
TWRP is convenient, but not absolutely necessary. Would like a Lineage rom though.
Click to expand...
Click to collapse
Agreed. I've been looking into compiling TWRP myself but this is all new to me. The only device with TWRP with this chipset is the Redmi 9. I've compared both boot.img's and they are both setup differently. If I had more knowledge ont he subject I could easily achieve this I believe.
If I have time I'll compare Gen 2 vs Gen 3 boot.img's, that may help understand the folder and file structure better.

holmesmalone said:
The issue I had, and resolved, was the lack of the latest fastboot drivers. Gained root with Magisk successfully.
Click to expand...
Click to collapse
What process did you use with magisk to gain root after bootloader unlock? was it as simple as installing magisk manager and flashing root through the manager?
Thanks

el7145 said:
What process did you use with magisk to gain root after bootloader unlock? was it as simple as installing magisk manager and flashing root through the manager?
Thanks
Click to expand...
Click to collapse
The same process worked for me.

holmesmalone said:
The same process worked for me.
Click to expand...
Click to collapse
How did you obtain the boot.img to patch??? I cant find the stock firmware anywhere, and im not clear on pulling the stock boot.img (getting permission denied errors when attempting via adb)

el7145 said:
How did you obtain the boot.img to patch??? I cant find the stock firmware anywhere, and im not clear on pulling the stock boot.img (getting permission denied errors when attempting via adb)
Click to expand...
Click to collapse
Select and download your preferred rom. Then unzip the rom and in the unzipped folder select the boot.img file and use it.
With some devices and roms, under some circumstances, the vbmeta.img file can and should be used. If I can recall correctly, Magisk will specify.

holmesmalone said:
Select and download your preferred rom. Then unzip the rom and in the unzipped folder select the boot.img file and use it.
With some devices and roms, under some circumstances, the vbmeta.img file can and should be used. If I can recall correctly, Magisk will specify.
Click to expand...
Click to collapse
ok, so ur just pulling the boot img from one of the GSI roms...im just trying to pull the stock boot img...do you happen to know where one can download the stock firmware for this device, this is my 1st lenovo tablet

el7145 said:
ok, so ur just pulling the boot img from one of the GSI roms...im just trying to pull the stock boot img...do you happen to know where one can download the stock firmware for this device, this is my 1st lenovo tablet
Click to expand...
Click to collapse
LMSA. https://pcsupport.lenovo.com/us/en/downloads/ds101291-rescue-and-smart-assistant-lmsa
Use this tool. Install and explore the file and folder structure it creates. Interrupt the process before it flashes your tablet for it will erase the files you need from your computer if you don't. Use trial and error here.

Since the original question was about root, Ill keep this going
I was able to download the most recent ROM from Lenovo rescue which was super simple, it downloads the ROM first and wont start the flash till you click the button. I did retrieve the stock boot.img, patched it, and flashed it, rebooted and had root. Heres where the many hours of fun started...I realized my wifi wasnt working (good sign something was messed up during flash). I realize the ROM downloaded from the Lenovo Rescue was newer then my old ROM. So I had flashed the newer boot.img over the old ROM (not good). I went back to Lenovo rescue to actually make use of the rescue and flash a full ROM. After completion I became stuck in fastboot mode. I could boot to recovery but not system and every restart or shutdown and restart would go straight to fastboot.
I did try to manually flash the ROM using what i thought was the right files and order (using flashinfo.txt as the order and MT6768_Android_scatter.txt for the partition names for each image). Everything flashed successfully, but upon reboot I was still stuck in fastboot mode. I tried everything I could think of and even ran the Lenovo Rescue a few times.
After many hours, I came across this command for fastboot..."fastboot set_active a" which finally allowed me to boot into system. I assume this tablet uses the A/B slot partitions, but I think they only make use of the A for boot? Thats my thought
So next is too try to patch the correct disc.img for my current rom (which is the latest from Lenovo Rescue) and flash again making sure to flash to the boot_a partition and hopefully everything goes like it should
Hopefully that command helps someone save many hours if they find themselves stuck in fastboot mode while rooting and/or flashing.

el7145 said:
Since the original question was about root, Ill keep this going
I was able to download the most recent ROM from Lenovo rescue which was super simple, it downloads the ROM first and wont start the flash till you click the button. I did retrieve the stock boot.img, patched it, and flashed it, rebooted and had root. Heres where the many hours of fun started...I realized my wifi wasnt working (good sign something was messed up during flash). I realize the ROM downloaded from the Lenovo Rescue was newer then my old ROM. So I had flashed the newer boot.img over the old ROM (not good). I went back to Lenovo rescue to actually make use of the rescue and flash a full ROM. After completion I became stuck in fastboot mode. I could boot to recovery but not system and every restart or shutdown and restart would go straight to fastboot.
I did try to manually flash the ROM using what i thought was the right files and order (using flashinfo.txt as the order and MT6768_Android_scatter.txt for the partition names for each image). Everything flashed successfully, but upon reboot I was still stuck in fastboot mode. I tried everything I could think of and even ran the Lenovo Rescue a few times.
After many hours, I came across this command for fastboot..."fastboot set_active a" which finally allowed me to boot into system. I assume this tablet uses the A/B slot partitions, but I think they only make use of the A for boot? Thats my thought
So next is too try to patch the correct disc.img for my current rom (which is the latest from Lenovo Rescue) and flash again making sure to flash to the boot_a partition and hopefully everything goes like it should
Hopefully that command helps someone save many hours if they find themselves stuck in fastboot mode while rooting and/or flashing.
Click to expand...
Click to collapse
I'm trying to solve the fastboot issue but I can't find fastboot drivers for the tablet. Have any suggestions?

Siege9929 said:
I'm trying to solve the fastboot issue but I can't find fastboot drivers for the tablet. Have any suggestions?
Click to expand...
Click to collapse
im assuming in device manager, you have a yellow exclamation by "Android"? you need the mediatek drivers.
Go here https://developer.android.com/studio/run/oem-usb
scroll down, dont make the misake of clicking on "Lenovo", you are clicking on the section labeled "MTK" download the zip, go to device manager and manually update the driver, once updated fastboot should work
at cmd run "fastboot devices" to make sure your device is recognized

el7145 said:
im assuming in device manager, you have a yellow exclamation by "Android"? you need the mediatek drivers.
Go here https://developer.android.com/studio/run/oem-usb
scroll down, dont make the misake of clicking on "Lenovo", you are clicking on the section labeled "MTK" download the zip, go to device manager and manually update the driver, once updated fastboot should work
at cmd run "fastboot devices" to make sure your device is recognized
Click to expand...
Click to collapse
Manually selecting the "Android Bootloader" driver fixed it. Thanks!

I just got my TB125FU to replace my 7-year-old Google Pixel C on its last legs.
Its Hardware ID is USB\VID_0E8D&PID_201C&REV_0100
I found a pack of Mediatek drivers here.
It's a bloated pack, so I extracted just the files needed for the TB125FU and attached to this post.
Once installed, my tablet appeared with a "fastboot devices" command.
I have also had good luck with the latest firmware for Motorola/Lenovo devices here.

hugehead83 said:
I have also had good luck with the latest firmware for Motorola/Lenovo devices here.
Click to expand...
Click to collapse
just an fyi: thats not the most recent firmware, the lenovo rescue tool had the latest, which at the moment for my device a few days ago was TB125FU_S000118_220927_ROW