I think I now understand my mistakes, but I'd love to hear it if there's a way around this. I have the International version H815. My plan was to end up with a rooted version of Marshmallow. At the beginning of the day, I was not so clear about the difference between unlocking and rooting. I followed directions to install a rooted version of Lollipop. That went well. I flashed TWRP but couldn't figure out why that didn't work until I figured out that the bootloader should have been unlocked first. I then went through most of the steps to officially unlock the phone, but my phone just hangs at a fastboot intro screen using the abd reboot bootloader command, so I can't use the fastboot utility to recover the device ID I would need to get an unlock code. And I can't get into the original recovery menu using the power-volume down keys. I think I overwrote the stock Recovery utility when I flashed TWRP from within a rooted system. Switching back to a stock kdz didn't help. The phone still works fine otherwise, but now I see no path to unlocking it and then installing TWRP to load a rooted 6.0 image. Should I just give up now, or are there any other options?
Thanks,
Jim
Got it working
I reinstalled the rooted image and flashed a stock recovery.img. That didn't work. Then I went back to stock with a different kdz image. I still couldn't access the recovery tools with the power and volume down buttons, but I was a able to get fastboot functioning and got the unlock code from LG and entered it - now to see if I can go back to an unlocked system and install TWRP to upgrade to Marshmallow.
Op3, stock recovery and official 9.0.2 rom.
Eveything elese is fine but bootloader is unlocked and when starting phone the dm-verity says that bootloader is unlocked.
I can go to fastboot and command fastboot oem lock and phone Will show that yes and no screen, but even If I select yes phone just boots and shows that bootloader is still unlocked.
I can not fine any info for this kind of problem or how to solve this. Anybody has any ideas how to get bootloader locked?
Have you tried selecting no, instead of yes?
When I tried the first CB, I had something similar where, with the new bootloader, the responses were inverse.
morphvale said:
Have you tried selecting no, instead of yes?
When I tried the first CB, I had something similar where, with the new bootloader, the responses were inverse.
Click to expand...
Click to collapse
Yes I did try that also but did not work.
But I know figured a way to do that. I used the MSM Download tool program. That flashed some very old software but did not lock the bootloader (like I think it should do?) But after that fastboot oem lock worked. Then I sideloaded newest 9.0.2 and now bootloader is locked and phone is completely stock and works fine. So no idea what was wrong, but luckily there is this MSM.
I also found out that newest windows10 has the qualcomm 9008 drivers so no need to install them separately like the instructions says.
You probably used MSM with 3.2.8 or similar. Newer ones also lock the bootloader.
Pie 9.0.2 cannot lock the bootloader. Potentially a bug.
Works fine on 5.0.8; simply downgrade, lock and install Pie again
Is there any way to unlock the non european variants of G8s? G810EA, not EAW.
Tried on LG dev page it refuses saying not supported but my fastboot shows option to write a BL unlock key and says it can be unlocked.
Any possibility of getting unlocked BL another way? Im open to unofficial methods.
Many thanks
corpsegrinder62 said:
Is there any way to unlock the non european variants of G8s? G810EA, not EAW.
Tried on LG dev page it refuses saying not supported but my fastboot shows option to write a BL unlock key and says it can be unlocked.
Any possibility of getting unlocked BL another way? Im open to unofficial methods.
Many thanks
Click to expand...
Click to collapse
Well I think the bl unlock method for a while for v40 and g7 was crossflashing to a firmware with fastboot and fastboot booting (not flashing) a magisk patched boot IMG, then using the root to dd flash the engineering abl which allows unlocking. I don't know if that would work for g8s without a brick or if your fastboot even allows fastboot booting
antintin said:
Well I think the bl unlock method for a while for v40 and g7 was crossflashing to a firmware with fastboot and fastboot booting (not flashing) a magisk patched boot IMG, then using the root to dd flash the engineering abl which allows unlocking. I don't know if that would work for g8s without a brick or if your fastboot even allows fastboot booting
Click to expand...
Click to collapse
Thanks alot for the response, that's very hopeful! any place you could point me to the process of flashing the engineering abl? not even sure were to start looking for it on the G8s. P.S im not a noob just a noob to LG
I think my fastboot would allow booting as it does respond to basic commands i've tried so far, only issue is the boot.img's out there are all for the EAW version, anyway to decompile a boot img from a kdz?
Thanks in advance!
corpsegrinder62 said:
Thanks alot for the response, that's very hopeful! any place you could point me to the process of flashing the engineering abl? not even sure were to start looking for it on the G8s. P.S im not a noob just a noob to LG
I think my fastboot would allow booting as it does respond to basic commands i've tried so far, only issue is the boot.img's out there are all for the EAW version, anyway to decompile a boot img from a kdz?
Thanks in advance!
Click to expand...
Click to collapse
Yeah, download the kdz for the exact software version you're on, look up kdztools steadfasterx, go on the GitHub, extract the boot IMG, and patch it in the magisk app. Then try fastboot booting it; flashing it without bl unlock would make it not let you boot, but since fastboot booting worked on g7 and v40, I'd assume it would be ok. You might want to join the telegram group and find someone who knows for certain though
antintin said:
Yeah, download the kdz for the exact software version you're on, look up kdztools steadfasterx, go on the GitHub, extract the boot IMG, and patch it in the magisk app. Then try fastboot booting it; flashing it without bl unlock would make it not let you boot, but since fastboot booting worked on g7 and v40, I'd assume it would be ok. You might want to join the telegram group and find someone who knows for certain though
Click to expand...
Click to collapse
Thanks, im going to try this really appreciate your help here. and the abl any idea how i go about flashing that to unlock? Patching the main boot img from magisk while still locked even if the boot img boots with fastboot obviously still won't work to write boot partition with locked BL would it?
thanks i am in that group and asked several times but got ignored, thats why i thought i would ask here, there are 8 countries on this variant so i figured it would help all if it could be figured out since LG Dev only supports the euro model and this variant can actually be unlocked
corpsegrinder62 said:
Thanks, im going to try this really appreciate your help here. and the abl any idea how i go about flashing that to unlock? Patching the main boot img from magisk while still locked even if the boot img boots with fastboot obviously still won't work to write boot partition with locked BL would it?
thanks i am in that group and asked several times but got ignored, thats why i thought i would ask here, there are 8 countries on this variant so i figured it would help all if it could be figured out since LG Dev only supports the euro model and this variant can actually be unlocked
Click to expand...
Click to collapse
Worry about that later, first figure out if you can fastboot boot a boot IMG. Fastboot flashing it will 100% brick you
antintin said:
Worry about that later, first figure out if you can fastboot boot a boot IMG. Fastboot flashing it will 100% brick you
Click to expand...
Click to collapse
Thanks again, so here is the result.
I am struggling with both kdz tools and kdz firmware extractor, im able to get the DZ and dll files out, but on kdz tools using undz i end up with a bunch of .chunk files, and firmware extractor gives a zlib deflate error and gives a 0 byte file,
Taking this one side, i tried to rename the .chunk to a .img file, fastboot proceeded to download and attempt to boot, but stuck at logo, im guessing because the extraction of the boot img wasn't successful. but fastboot command worked and downloading to the phone worked, and it did attempt to boot, i have no idea now though how to get this kdz extracted. so needless to say without a working boot img i can't confirm 100% all i can confirm is fastboot boot command works.
any ideas?
[EDIT] i changed the unkdz to -c command, it extracted a boot img, i did as you said, patched boot img with magisk, and tried to fastboot boot it, sure enough! booted with dev warning error popups, but went into magisk, root access granted! so the patched boot img works by fastboot booting.
How would i go about the rest though with abl? as far as im aware we still waiting for firehose for G8/s?
corpsegrinder62 said:
Thanks again, so here is the result.
I am struggling with both kdz tools and kdz firmware extractor, im able to get the DZ and dll files out, but on kdz tools using undz i end up with a bunch of .chunk files, and firmware extractor gives a zlib deflate error and gives a 0 byte file,
Taking this one side, i tried to rename the .chunk to a .img file, fastboot proceeded to download and attempt to boot, but stuck at logo, im guessing because the extraction of the boot img wasn't successful. but fastboot command worked and downloading to the phone worked, and it did attempt to boot, i have no idea now though how to get this kdz extracted. so needless to say without a working boot img i can't confirm 100% all i can confirm is fastboot boot command works.
any ideas?
[EDIT] i changed the unkdz to -c command, it extracted a boot img, i did as you said, patched boot img with magisk, and tried to fastboot boot it, sure enough! booted with dev warning error popups, but went into magisk, root access granted! so the patched boot img works by fastboot booting.
How would i go about the rest though with abl? as far as im aware we still waiting for firehose for G8/s?
Click to expand...
Click to collapse
Nice, now you basically have to do the same thing as the other bl unlock guides. You flash the engineering abl to slot b (while on slot a) which needs to have working pie on it. Then you switch to it, go to fastboot, and do fastboot oem unlock.
antintin said:
Nice, now you basically have to do the same thing as the other bl unlock guides. You flash the engineering abl to slot b (while on slot a) which needs to have working pie on it. Then you switch to it, go to fastboot, and do fastboot oem unlock.
Click to expand...
Click to collapse
Thats great! When you say flash though. You mean dd flash with terminal with su to flash boot_b using said root access right? Then using fastboot to switch to boot_b and use that to unlock, correct?
But no abl yet for G8s as far as im aware, so i take it we need to wait on firehose for it or would cross flashing abl from another device work? Also android 10 update is around the corner, im still on pie 10i for now.
Thanks alot for your patience to help
Anyone know how to lock the bootloader successfully? Clarification - I can lock the bootloader successfully but then can't boot normally.
I have a Frankenstein LG G7 emw from Aliexpress.
I have crossflashed it with an open EUR 10 Q kdz (G710EM)
After flashing the V35 onto abl_a and using "fastboot oem lock" the command is successful.
If I then restore my backed up original abl_a I then get a red triangle bootloop. I also sometimes get an unpatched fastboot screen with correct model type (G710EMW instead of the V35 one)
However I am unable to boot normally and then have to restore the V35, unlock the bootloader again, restore original abl, get into download mode and then reflash kdz using LGUP.
What do I need to lock the the bootloader and then boot normally? I want to be able to use Google pay and banking apps
Any help, ideas, tips or clues appreciated
I did relock the bootloader and successfully booted into system, but in between for 10 days my phone was like a dead hardware before coming into original working state.
sourabh7625 said:
I did relock the bootloader and successfully booted into system, but in between for 10 days my phone was like a dead hardware before coming into original working state.
Click to expand...
Click to collapse
When using fastboot to relock bootloader did you use the V35 abl_a or the G7 abl_a?
I'm thinking this may be where I'm going wrong but I haven't had time to test it out yet
gridmuncher said:
When using fastboot to relock bootloader did you use the V35 abl_a or the G7 abl_a?
I'm thinking this may be where I'm going wrong but I haven't had time to test it out yet
Click to expand...
Click to collapse
It was running on competely stock just booted into fastboot from using "adb reboot bootloader" and entered "fastboot oem lock" and everything worked fine.
What's state your phone currently in ? And what is your desired state ?
I have cross flashed the phone with an Android 10 kdz (european 30f). The bootloader is unlocked, but I cannot relock the bootloader. I have erased the laf_a partition to enable fastboot, but then "fastboot oem lock" doens't work. If I flash the v35 to abl_a then th command works but then the phone is in a red triangle bootloop.
I have tried extensively to google it but I have no idea how to make it work. I backed up numerous partitions using QFIL and tried to restore them once bootloader was locked but nothing seemed to help. The only way out of the bootloop was to return to download mode a reflash a kdz using LGUP
Hello!
So, I've purchased a T-Mobile LG G8 ThinQ phone for use in Canada and wanted to remove the T-Mobile splash.
After reading a bit on the forums here, it seems like it'll be too complex for someone like me. (I'm lazy)
So, I uninstalled Magisk, which supposedly uninstalls root and I'm looking to relock my boot loader.
Just I'm having a hard time getting back into bootloader with the vol- and power button method, and using adb to reboot into bootloader doesn't seem to give the desired results.
The phone just reboots like normal with the unlocked bootloader warning.
Reason I wanna relock it is so that I can use Android Pay again and using Magisk Hide or the alternative would require them to give a guaranteed result.
One day it could be patched and I won't be near a PC to resolve the issue and I personally don't like carrying my wallet.
cheddarest said:
Hello!
So, I've purchased a T-Mobile LG G8 ThinQ phone for use in Canada and wanted to remove the T-Mobile splash.
After reading a bit on the forums here, it seems like it'll be too complex for someone like me. (I'm lazy)
So, I uninstalled Magisk, which supposedly uninstalls root and I'm looking to relock my boot loader.
Just I'm having a hard time getting back into bootloader with the vol- and power button method, and using adb to reboot into bootloader doesn't seem to give the desired results.
The phone just reboots like normal with the unlocked bootloader warning.
Reason I wanna relock it is so that I can use Android Pay again and using Magisk Hide or the alternative would require them to give a guaranteed result.
One day it could be patched and I won't be near a PC to resolve the issue and I personally don't like carrying my wallet.
Click to expand...
Click to collapse
I'm not an expert (or even that experienced with phone flashing), but a li'l Googling gives this result. The relevant part being:
Re-locking the bootloaderTo re-lock the bootloader:
For newer devices (2015 and higher):
fastboot flashing lock
For older devices (2014 and lower):
fastboot oem lock
Note: Re-locking the bootloading on a Motorola Xoom erases all user data (including the shared USB data).
blaacksheep said:
I'm not an expert (or even that experienced with phone flashing), but a li'l Googling gives this result. The relevant part being:
Re-locking the bootloaderTo re-lock the bootloader:
For newer devices (2015 and higher):
fastboot flashing lock
For older devices (2014 and lower):
fastboot oem lock
Note: Re-locking the bootloading on a Motorola Xoom erases all user data (including the shared USB data).
Click to expand...
Click to collapse
Sure, I'll try that if you can help me figure out why I can't get back into the bootloader.
You need to use QFIL to put flash back the engineering abl file to get fastboot. Then you can run the command.
armodons said:
You need to use QFIL to put flash back the engineering abl file to get fastboot. Then you can run the command.
Click to expand...
Click to collapse
Thank you! That worked, I was flashing abl_a and abl_b with the backup images to see if that did anything.