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Guide LG G8/G8x/v50 Bootloader Unlock and Magisk Root using Firehose

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yearning_5

Member
Dec 21, 2017
8
2
is it at the beginning ?? I remember I had some similar problems with a non LG USB cable, I took my LG USB cable and I don t think I had that kind of problem again ...
Actually i bought the phone from Alliexpress so i guess its cable is not genuine LG, but it works good, as it can be detected under adb, LGUP and 9008 mode as well, the problem is for unlocking the BootLoader I used this Tutrial " https://bbs.lge.fun/thread-155.htm " chineese website ( thanks to google translate) that involved adb command line no Qfil, and i succeeded ( 20m ) version but if i upgrade to 20z i had to enter fasboot or the Qfile method well as metioned b4 the qfil got Sahara fail , thought to try the adb method to enter fastboot and Bricked my phone then obliged to pay 20$ via Teamviewer to fix it well this the whole thing
sorry for the log story friend
many thanks to all
 
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GeoFX

Senior Member
Jul 29, 2012
380
178
Houston, TX
LG V30
Samsung Galaxy S9+
Sir, allow me to explain a bit better here: if you have a phone which can boot to this screen which is best known as fastboot, you have an unlocked bootloader. At least with these phones. Unfortunately, the screenshot function isn't available from fastboot to my knowledge.
I noticed that the software version for your screencap is for a G8. Is this because you weren't able to flash your original LG450VM backup abl_a and abl_b files? Is there any way to remedy this (like by flashing a KDZ via LGUP)?

Also, since you're stuck on the exploitable engineering BL, how would this affect future OTA updates (esp. if your SW version looks to be G8)? Thanks!
 
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MenialFerret

New member
Jun 3, 2021
4
1
LG G8X ThinQ
Google Pixel 5
Followed all the directions, unlocked the bootloader and rebooted. Rebooted and now my ATT LG G8x is stuck in a bootloop.

Edit: Finally got it in EDL mode and restored backed up boot file

Edit 2: Now I cannot enter fastboot mode
 
Last edited:
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lallolu

Senior Member
Dec 5, 2009
651
154
Huawei Mate 30 Pro
Quote from OP, "
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.
"

Should I use the downloaded abl_a.bin on both abl_a and abl_b partitions? I am asking because only abl_a was available to download in the OP.

Edit: The answer is to load the downloaded abl_a.bin for abl_a and abl_b partitions. here https://forum.xda-developers.com/t/...isk-root-using-firehose.4221793/post-84446789.
 
Last edited:

lallolu

Senior Member
Dec 5, 2009
651
154
Huawei Mate 30 Pro
I am now unlocked but I fastboot installing parttion_a fails with error,"
FAILED (remote: Error flashing partition : Volume Full)"

I think it is strange that my backed up abl_a.bin is 32MB, while backed up abl_b.bin is just 1MB. The abl_a.bin I downloaded from the OP is also 1MB.

Why is my backed up abl_a.bin so big?

Does anyone have abl_a.bin for LG V50 version 20j. I am not sure, but I think my version was 20j since I updated in March. abl_a.bin for version 20h can also be shared, thanks.

EDIT:
I solved it with a workaround. I installed the correctly backed up abl_b.bin to the abl_a partition.
 
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GNT01

Senior Member
Apr 20, 2013
55
4
Somebody had done the unlock on PC's with Ryzen ? Its true that the finger scan gets disabled after unlocking the bootloader?
 

tdusen

Senior Member
Sep 14, 2006
613
52
fingerprint reader is disabled while the engineering boot loader is installed. after unlock, you reinstall your backed up abl files and fingerprint scanner is restored.

no idea about Ryzen. I don't know why it would matter.
 

duonpqua

New member
Jun 8, 2021
2
0
Disclaimer: I am not responsible for any problems from using this guide.
Works for G8, G8s, G8x, and v50
Confirmed working on G8 and v50

Requirements: Android 10

QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
LG Mobile Driver:
ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

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.


Magisk
Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
Github Page: https://github.com/topjohnwu/Magisk


Tìm vị trí bạn đang sử dụng từ bộ nạp khởi động fastboot trước đó
Đi tới Windows Explorer và chuyển đến C: \ Users \ Username \ AppData \ Roaming \ Qualcomm \ QFIL \ COMPORT #
Chuyển vào điện thoại của bạn boot_a.bin hoặc boot_b.bin mà bạn đã sao lưu trong thư mục COMPORT #.

Tải xuống và cài đặt Trình quản lý Magisk.
Mở Magisk quản lý và bên cạnh Magisk, nhấn "Cài đặt", sau đó "Chọn và vá tệp" và chọn boot_a.bin hoặc boot_b.bin.
Sau khi Magisk vá img boot, bạn sẽ có magisk_p vá #####. Img in the directory Load down of the phone.
Move it to your PC.

Restart to EDL
Open QFIL. Nhét vào công cụ> Phân vùng quản lý.
Tìm vị trí bạn đang truy cập từ fastboot bootloader trước đó và chuột phải vào boot_a hoặc boot_b và chọn Phân vùng dữ liệu quản lý.
Nhập vào Load and select file magisk_pished #####. Tôi đã chuyển từ điện thoại của mình.
Chờ đến khi hoàn thành và đóng phân vùng Trình quản lý. Bạn sẽ tự khởi động lại EDL sau khi nhấn OK. Chờ đã.

Khởi động lại hệ thống bằng cách giữ đĩa và nguồn cho đến khi điện thoại của bạn khởi động lại từ EDL rồi nhả cả hai.
Your phone has been Open Bootloader key with Magisk Root.






Hy vọng rằng điều này sẽ giúp ích.
This guide do tôi viết, nhưng thông tin được cung cấp bởi Cloud1250000.
Nếu có bất kỳ lỗi nào cho tôi biết và tôi sẽ sửa chữa.

Disclaimer: I am not responsible for any problems from using this guide.
Works for G8, G8s, G8x, and v50
Confirmed working on G8 and v50

Requirements: Android 10

QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
LG Mobile Driver:
ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

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.


Magisk
Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
Github Page: https://github.com/topjohnwu/Magisk


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.
Chờ cho đến khi hoàn tất rồi đóng Trình quản lý phân vùng. Điện thoại của bạn sẽ tự khởi động lại EDL sau khi nhấn OK. Chờ đã.

Khởi động lại hệ thống bằng cách giữ vol- và nguồn cho đến khi điện thoại của bạn khởi động lại khỏi EDL rồi nhả cả hai.
Điện thoại của bạn hiện đã được Mở khóa Bootloader bằng Magisk Root.






Hy vọng rằng điều này sẽ giúp.
Hướng dẫn này do tôi viết, nhưng thông tin được cung cấp bởi Cloud1250000.
Nếu có bất kỳ lỗi nào cho tôi biết và tôi sẽ sửa chữa.
Mình sử dụng LG G8 thinq hàn và làm theo nhưng gặp lỗi "Download fail: firehose fail fhloader fail process fail"
 

way2aware

Senior Member
Feb 20, 2015
95
39
Phoenix
LG V50 ThinQ
OnePlus 9 Pro
I noticed that the software version for your screencap is for a G8. Is this because you weren't able to flash your original LG450VM backup abl_a and abl_b files? Is there any way to remedy this (like by flashing a KDZ via LGUP)?

Also, since you're stuck on the exploitable engineering BL, how would this affect future OTA updates (esp. if your SW version looks to be G8)? Thanks!
You are correct- the software version says that, because I wasn't able to flash my abl_a and abl_b back using fastboot. I'll admit that I haven't really put any more effort into this after that one attempt, because the phone is working great and the "g8' thing affects me not at all. I might go ahead and try using QFIL to replace the abl_a and abl_b with my backed up files, but the most honest answer I can give to your questions at this time is: 'I don't know.'
 

AndewAndroid

New member
Mar 31, 2018
1
0
hello. can I unlock the LG V50 ThinQ bootloader on the V450VM (Verizon) version by flashing the Frp_Verizon.img file from LG G8 ThinQ?
 

Goga$

New member
May 28, 2021
3
0
Hi
I have bricked my lg g8x
Can someone help me
No display only detects in QIFL. Now if I select partition manager nothing happens

please help
 

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Metalar.1

New member
Jun 13, 2021
1
0
Any help my lg g8x japan 901lg cant upgrade to android 10 , it say u update last version , any tips plz , plz i cant connect lg bridge to my lg g8x japan 901lg ....
 

zhophos

New member
Jun 13, 2021
1
0
Success! This actually works. Any version Android 10 on my G8 Sprint version.

If you have trouble at the fastboot step, and you see a yellow exclamation mark in the device drivers that just says, "Android", you need different drivers for fastboot.

I found them from this V35 guide, step 7.


Link: https://goo.gl/CqqNZT

I hope this help!
after hours stuck, this worked. V50 Kor was not detected by fastboot devices, hot its ok. thanks!
 

Rootmaster906

Senior Member
Dec 2, 2020
300
12
Nexus 6
Samsung Galaxy Note 10
Disclaimer: I am not responsible for any problems from using this guide.
Works for G8, G8s, G8x, and v50
Confirmed working on G8 and v50

Requirements: Android 10

QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
LG Mobile Driver:
ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

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.


Magisk
Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
Github Page: https://github.com/topjohnwu/Magisk


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.
Why can't we just unlock the bootloader and root with magisk? Patch boot image
 

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  • 1
    i need help. im on the steps where you load the abl_a.bin modified boot. and im watching a video and he a option to save the partition. On Qfil i only have the option close. Do i have to save it or can i continue

    Looks like you missed a part, you're suppose to left click the partition you want to modify / save / change, and then right click it and select 'manage partition'.

    It's at that point you have the option to erase, load, etc. The output, at the bottom of the qfil app will tell you success / failure etc.

    cheers
    1
    Having same issues after upgrading to a11 I followed magisk root steps and till now no way to root how did you fix yours you mind explaining

    For Magisk, do you tick the option "Preserve force encryption"? and so it's better to stay on Android 10 for rooting right?
  • 52
    Disclaimer: I am not responsible for any problems from using this guide.
    Works for G8, G8s, G8x, and v50
    Confirmed working on G8 and v50

    Requirements: Android 10

    QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
    QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
    LG Mobile Driver:
    ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
    Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
    abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

    Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
    This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

    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
    Enable OEM Unlock.jpg


    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#)
    Device Manager - Ports.jpg
    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.
    QFIL.jpg
    Click Tools > Partition Manager.
    Find Abl_a and right click on it and select Manage Partition Data. Click Read to backup your abl_a.
    right click manage partition data.jpg
    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
    change readdata to abl.jpg

    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.
    abl a and b finished.jpg
    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.
    Fastboot Bootloader Locked and Slot.jpg

    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.
    Move abl a and b to adb folder.jpg
    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
    BL Unlock NoYes.jpg
    Reboot back to the Bootloader. Unplug your phone, Power off, Hold Vol-, then Plug it in.
    Your phone should say Device State – unlocked now
    Fastboot Bootloader Unlocked and Slot.jpg


    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.


    Magisk
    Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
    Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
    Github Page: https://github.com/topjohnwu/Magisk


    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.
    6
    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.
    4
    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.
    v50thinQ.jpg
    v50thinq2.jpg
    4
    can't access download mode. getting waring that the phone didn't pass safety check and keeps on booting to fastboot mode. any help will be greatly appreciated. was trying to root and this happened. bootloader is unlocked. can access fastboot but no download mode. V500N


    I had similar experience, it's just a lil tricky. I found it was easiest to boot phone completely, plug into computer, you hear the pc chime when phone is recognized, at that point hold the vol - and power until the pc chimes the disconnect, then immediately release the power button and tap the vol + repeatedly (usually 1-3 times) until the PC chimes connected, this all while still holding vol -. Practice how to hold the phone, release power and tap a few time and then it was easy.
    3
    It should since the abl used is from a g8x and it worked on my v50 sprint.. :)