Is it something I am doing wrong command prompt wise? The engineering abl I used was from the instructions. If it means anything my device was shipped with 12.
whenever I did ./cd fastboot devices nothing happened, only made a new line.
Bootloader Unlock Unlocking your bootloader will erase all data on your phone
First Install LG Mobile Driver, QFIL driver, and QFIL (Select first option, WWAN)
All Variants other than Verizon: Go to Settings, > System > About Phone > Software Info > Tap Build Number 7 Times.
Go back to Settings > System > Developer Options. Check Enable OEM Unlock
Boot you phone into EDL
You can make sure that your phone is in EDL by plugging your phone to your pc and checking the Device Manager > Ports > Qualcom HS-USB QDLoader 9008 (COM#)
Hold Vol- and Power, when the phone screen turns off to restart begin quickly pressing the vol+ but keep holding vol- and power.
Here is a youtube video of how to boot to EDL:
Open QFIL, Select your Phone's Port, Select Flat Build under Select Build Type, Select the Firehose.elf file under Select Programmer, on the bottom right of QFIL select UFS as the Storage Type.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
Do the same for abl_b.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Once your phone is in Fastboot it should say
Device State: Locked and Active A/B Slot - _a or _b
remember whichever slot your device says and stay on that slot, you may risk bricking if you change to the other slot. You also need this for Root later.
Extract the ADB.zip
open a Command Prompt and change the directory to the adb folder you just extracted
cd C:\adb
run fastboot devices in that command prompt. it should show "LMG850UM fastboot"
Move the backed up abl_a.bin and abl_b.bin to the adb folder, also frp_verizon.img if you have the verizon LG G8.
Verizon LG G8 only: Run fastboot flash frp frp_verizon.img then fastboot reboot-bootloader
Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Run fastboot oem unlock
Select Unlock The Bootloader with your arrow keys and press the Power Button
Find the slot you are on from the fastboot bootloader earlier
Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
Transfer to your phone the boot_a.bin or boot_b.bin that you backed up in the COMPORT# folder.
Download and install Magisk Manager.
Open Magisk Manager and beside Magisk hit "Install" then "Select and Patch a File" and select the boot_a.bin or boot_b.bin.
After Magisk has patched your boot img you should have magisk_patched#####.img in your phones Download folder.
Transfer it to your PC.
Reboot to EDL
Open QFIL. Click Tools > Partition Manager.
Find the slot you are on from the fastboot bootloader earlier and right click on either boot_a or boot_b and select Manage Partition Data.
Click Load and select the magisk_patched#####.img file you transfered from your phone.
Wait for it to finish then Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Reboot to System by holding vol- and power till your phone reboots out of EDL then release both.
Your phone is now Bootloader Unlocked with Magisk Root.
Hopefully this helps.
This guide was written by me, but the information was provided by Cloud1250000.
If there are any errors let me know and I will fix.
Hey everyone. I was successfully able to unlock my V500N bootloader using this method, but I now want to return the device and need to relock the bootloader. Flashing the engineering abl_a allows me to get to fastboot, and I can type "fastboot oem unlock" which takes me to the "Do you want to lock the bootloader?" screen. Unfortunately, after I select "lock the bootloader," the bootloader remains unlocked and the device reboots to a "no command" screen. Am I doing something wrong here? Any help would be appreciated.
i got IMEI 0, unkown baseband. to fix it i wish to use ur rooting method.
is it possible to relock the boatloader and install stock firmware after fix the issues.
is there any other way to fix without unlock, rooting.
i got IMEI 0, unkown baseband. to fix it i wish to use ur rooting method.
is it possible to relock the boatloader and install stock firmware after fix the issues.
is there any other way to fix without unlock, rooting.
I was eventually able to relock the bootloader and install stock firmware. It just took a really long time, and lots of trial an error. As for fixing the IMEI and baseband, I don't know about the baseband, but you can definitely fix the IMEI. I used this method. You basically just edit a file and then flash it with QFIL. If you want to go back to stock after that, you'll need what seems to be the exact software version of Android your phone started out with (this is where the trial and error comes in). Flash it using LGUP, then boot to EDL mode and use QFIL to backup the abl_a and abl_b files. After that, reboot to system, then go back into EDL mode to flash the enginering abl via QFIL. You should have fastboot now, and you can use that to relock the bootloader. You'll get an error when you try to boot, but just boot back into EDL mode and flash the abl_a and abl_b files you backed up earlier. After that you should be good.
I was eventually able to relock the bootloader and install stock firmware. It just took a really long time, and lots of trial an error. As for fixing the IMEI and baseband, I don't know about the baseband, but you can definitely fix the IMEI. I used this method. You basically just edit a file and then flash it with QFIL. If you want to go back to stock after that, you'll need what seems to be the exact software version of Android your phone started out with (this is where the trial and error comes in). Flash it using LGUP, then boot to EDL mode and use QFIL to backup the abl_a and abl_b files. After that, reboot to system, then go back into EDL mode to flash the enginering abl via QFIL. You should have fastboot now, and you can use that to relock the bootloader. You'll get an error when you try to boot, but just boot back into EDL mode and flash the abl_a and abl_b files you backed up earlier. After that you should be good.
Bros I am on stock Android 11 of at&t
I erased the lafs but before that i backed up the lafs files
but when i flash the laf file in edl mode it still opens fastboot mode,
i need laf of lg g8 att android 11
This tutorial bricked my phone because of lack of clarity.
1. You did not explain how crucial the backups for abl_a, and abl_b (messed up abl_b and my phone has no touch)
2. You did not explain that the "abl engineering file" is to be loaded for both abl_a and abl_b.
Now I am pulling my hair unbricking my phone. I managed to unlock the bootloader but I have no more backup for abl_a and abl_b. Is there any way to go back to stock then try the method again?
Bootloader Unlock Unlocking your bootloader will erase all data on your phone
First Install LG Mobile Driver, QFIL driver, and QFIL (Select first option, WWAN)
All Variants other than Verizon: Go to Settings, > System > About Phone > Software Info > Tap Build Number 7 Times.
Go back to Settings > System > Developer Options. Check Enable OEM Unlock
Boot you phone into EDL
You can make sure that your phone is in EDL by plugging your phone to your pc and checking the Device Manager > Ports > Qualcom HS-USB QDLoader 9008 (COM#)
Hold Vol- and Power, when the phone screen turns off to restart begin quickly pressing the vol+ but keep holding vol- and power.
Here is a youtube video of how to boot to EDL:
Open QFIL, Select your Phone's Port, Select Flat Build under Select Build Type, Select the Firehose.elf file under Select Programmer, on the bottom right of QFIL select UFS as the Storage Type.
Click Tools > Partition Manager.
Find Abl_a and right click on it and select Manage Partition Data. Click Read to backup your abl_a.
Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
Rename your ReadData_ufs_Lun4.bin to abl_a.bin
Do the same with abl_b, boot_a, and boot_b.
Boot_a and Boot_b is for Magisk Root. Skip if you only want Bootloader Unlock.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
Do the same for abl_b.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Once your phone is in Fastboot it should say
Device State: Locked and Active A/B Slot - _a or _b
remember whichever slot your device says and stay on that slot, you may risk bricking if you change to the other slot. You also need this for Root later.
Extract the ADB.zip
open a Command Prompt and change the directory to the adb folder you just extracted
cd C:\adb
run fastboot devices in that command prompt. it should show "LMG850UM fastboot"
Move the backed up abl_a.bin and abl_b.bin to the adb folder, also frp_verizon.img if you have the verizon LG G8.
Verizon LG G8 only: Run fastboot flash frp frp_verizon.img then fastboot reboot-bootloader
Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Run fastboot oem unlock
Select Unlock The Bootloader with your arrow keys and press the Power Button
Reboot back to the Bootloader. Unplug your phone, Power off, Hold Vol-, then Plug it in.
Your phone should say Device State – unlocked now
Now fastboot flash abl_a abl_a.bin
and fastboot flash abl_b abl_b.bin
Finish with fastboot reboot
Your Phone Is now Bootloader Unlocked.
Magisk Root Only do this after you have followed the above guide and have Unlocked your Bootloader.
Find the slot you are on from the fastboot bootloader earlier
Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
Transfer to your phone the boot_a.bin or boot_b.bin that you backed up in the COMPORT# folder.
Download and install Magisk Manager.
Open Magisk Manager and beside Magisk hit "Install" then "Select and Patch a File" and select the boot_a.bin or boot_b.bin.
After Magisk has patched your boot img you should have magisk_patched#####.img in your phones Download folder.
Transfer it to your PC.
Reboot to EDL
Open QFIL. Click Tools > Partition Manager.
Find the slot you are on from the fastboot bootloader earlier and right click on either boot_a or boot_b and select Manage Partition Data.
Click Load and select the magisk_patched#####.img file you transfered from your phone.
Wait for it to finish then Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.
Reboot to System by holding vol- and power till your phone reboots out of EDL then release both.
Your phone is now Bootloader Unlocked with Magisk Root.
Hopefully this helps.
This guide was written by me, but the information was provided by Cloud1250000.
If there are any errors let me know and I will fix.
I have a G8 (LM-G820TM, US T-Mobile variant) that had been updated OTA to Android 11 (G820TM30b). I used Windows 10 Pro 64-bit, version 21H2, on a Dell Latitude E6230 (That shouldn't matter, but is provided for reference).
Some notes for anyone else doing this, and wisdom I got from more experienced commenters in this thread:
Read all the instructions carefully. Read every word slowly. Do what you need to do to make sure you don't skip any steps. If necessary, print out the instructions and cross them off one by one.
EDL Mode doesn't show anything on the screen. You'll only know if your phone is in EDL mode if your computer makes a USB Connected chime, and it shows up under Ports in Device Manager.
Use a good quality USB 2.0 cable and USB 2.0 port. QFIL is finicky, and doesn't like USB 3 ports. If you get a Sahara error, use a different cable, a different port, or a different computer.
When you back up your abl_a and abl_b partitions, they should be about 1MB. (1024KB exactly, in my case). If they're significantly larger, then they didn't read correctly. You'll need to flash them back later, and if they didn't read correctly, you can't restore them.
The provided engineering abl_a should be flashed to abl_a and abl_b.
The engineering abl should only be used to enable fastboot temporarily so that you can unlock the bootloader. You can't leave it there - you have to flash your original abl_a and abl_b back to your phone once the bootloader is unlocked. If you leave the engineering abl on there, you'll either get a bootloop or your touchscreen won't work.
When booting into fastboot for the first time, Windows doesn't use the correct (or any) driver, so the phone just shows up as "Android" in Device Manager, and it doesn't show up when you do "fastboot devices". I had the LG Mobile Driver installed per the instructions, so it was just a matter of pointing Windows at the correct driver. In Windows 10 it was Update Drivers -> Browse my computer for drivers -> Let me pick from a list of available drivers on my computer -> Android -> LGE Mobile ADB Interface
Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
Do the same for abl_b.
Maybe I'm not catching on to something but, following the guide I don't have a abl_b.bin file besides the one backed up.
There was a link provided for an abl_a.bin file.
What am I not understanding?
Okay I got it this morning. Reread it still didn't understand but had some hunches so check around the net about LG dual sim unlocking and then it clicked. It was meant to say load the engineering file provided into both abl_a and abl_b
Thanks for the guide maybe rephrase that part. I was super confused for a bit, would never overwrite something with a different name without being super clear.
Ok, so maybe you unlocked the bootloader, still not sure. But you didn't even root? How do you consider this a success then?
Well, to answer the first part of your response here are a couple images (jpg type)
And for the rest of your response, I am going to try to finish out this tutorial this morning. I can say this much in advance: I have found that once a phone has been bootloader unlocked, gaining root (whether it be by magisk, the ol' SuperSU, or whatever) becomes an eventuality of overwhelmingly high likelihood of success. I am saying 'high likelihood' only because I realize that there are never any absolute guarantees in XDA, and it's not a good idea to jinx yourself by getting overconfident. So I'm gonna try to get rooted here and keep my fingers crossed, but I personally can not recall ever hearing of a phone whose bootloader is unlocked, that couldn't be rooted.
www.lg.com
