yashsingh1/xdaforums huggingface dataset:
[LG G8 Guides, News, & Discussion] Paula-Deen:
Had the same issue registering touch, and you are right, it is going to be an abl_a/_b issue.

If you didn't backup the original abl_a or abl_b, you can use a mouse to access the device and find what software version you're on, albeit it might not be necessary as long as it's for the right model. Mine is on g820TM20j, but I just downloaded the KDZ file for TMO20e, downloaded and used KDZ One-Click Extraction, extracted KDZ file, and it provided all the files you'd find in partition manager, including Abl_a/Abl_b. Then I just decided to take both extracted Abl_a & Abl_b files, open partition manager in QFIL, selected the corresponding file to replace, then clicked on "load" and used the extracted kdz files (abl_a replaced over extracted abl_a, and abl_b replaced over extracted abl_b). Close out of the manager, rebooted the phone, and finally the touch screen began working.

But while you're at it, I would backup your boot_a and boot_b files if you plan on rooting, as the extracted boot_a & boot_b files even from the extracted KDZ might cause software issues like system_UI crashing. As far as Abl_a & Abl_b from the extracted kdz file, I haven't had any issues and fully fixed the touchscreen problem without further issues.
[LG G8 Guides, News, & Discussion] Chris3445:
I was able to use this guide for a lg g8 sprint I had alot of issues but I finely got it I had to cross flash to lm820umj and at first I thought my phone was done but it was not I was stuck at the boot screen didn't now why but then I came across some saying to replace the ftm that came with the phone I did that still wen I would root and try to reboot it would stay at the boot screen then I seen the the advance setting in twrp and clicked on fix boot loop then the phone would boot fine and I the twrp was working fine but still no root so what I did I backed up my boot_a that was the one I had twrp already so u backed that one up used Magisk root to but I used the the boot_a that already had the working twrp and everything did that and I finely got root and twrp installed the reason why I wanted both is cuz I want to install windows 11 on the lg g8 and the guid said it need twrp and to be rooted but thanks to everyone here that made guids so wen wired things happened u can just fellow these really good guides thanks
[LG G8 Guides, News, & Discussion] Leon-28:
Will it work on my LG V50S SKT V510N40F android 12??
[LG G8 Guides, News, & Discussion] Chris3445:
I crosesed flashed my g8x to open can and now in twrp wen I try to get it to see the internal sd card I get these errors this a att modle thanks
[LG G8 Guides, News, & Discussion] akosizenmartin:
will this work on LG V50 Korean Variant Android 12?
[LG G8 Guides, News, & Discussion] phambiencuong:
my device is lg g8 android 12, i tried these 2 ways but still cant get into fastboot, is there any other way to get into fastboot i need help.
[LG G8 Guides, News, & Discussion] Jitteryheart87:
can you share backups of

abl_a, abl_b, boot_a, and boot_b.

and others if you have them because my backups are gone and i flashed a kdz and was wrong one so i need to find someone with same LG G8 Sprint like mine (mine was g820u21j) that would be willing to share backup
[LG G8 Guides, News, & Discussion] Surgemanxx:
Yes
[LG G8 Guides, News, & Discussion] Surgemanxx:
Write this to abl_a and abl_b in Qfil and you'll have fastboot.
[LG G8 Guides, News, & Discussion] Surgemanxx:
Cross flash it to the T-Mobile firmware.It will switch OTA to the T-Mobile firmware anyway?!?Oh found this backup,can't say if it's a Qfil copy backup or what?It does say it's for the G8 Sprint variant?

5.28 GB file on MEGA

mega.nz
[LG G8 Guides, News, & Discussion] YB123:
Hellp

C:\adb>fastboot devices

LMG8504b7c9054 fastboot

C:\adb>fastboot oem unlock ... FAILED (remote: Flashing Unlock is not allowed ) finished. total time: 0.007s how fix the ? pls !
[LG G8 Guides, News, & Discussion] hasnatjavied:
Hi, I tried this on LG V50 Thinq. All okay untill using fastboot oem unlock or flashing unlock. it shows that flashing unlock is not allowed..

can you help me to resolve this? remember that my phone doesn't have oem unlock option in developers menu, so i didn't enabled it.

My device is network locked by verzion. LG V50 thinq LM-V450 model.
[LG G8 Guides, News, & Discussion] AsItLies:
As is said in the very first post: "

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."

That image is meant to be used to allow the bootloader to be unlocked on verizon variants, when you don't have the 'oem unlock' in dev settings.

It also states it's for G8, not your V50. So you'd have to find one for your V50, obviously. But if your phone is network locked by Vzw, as you say, this won't change that, fixing that, on my G8 anyway, needed a remote service and $$$.

good luck
[LG G8 Guides, News, & Discussion] ze7zez:
https://xdaforums.com/t/who-can-flash-lg-v50-thinq-remotely.4557869/post-88197981
[LG G8 Guides, News, & Discussion] quattroz:
I can confirm the magisk root portion works for Android 12 on the TMobile variant with the OTA 40a update.

Unfortunately a sneaky OTA update got my rooted Android 10 setup.

The unlocked bootloader remained.

I was easily able to re-root with the magisk portion of this excellent tutorial.

Oddly, the upgrade to Android 12 seems to have changed the boot slot from A to B.
[LG G8 Guides, News, & Discussion] quattroz:
I'm happy to report that this works perfectly for Android 12 on the TMobile variant.
[LG G8 Guides, News, & Discussion] yeahman45:
can you downgrade lg v50 (v500n or v450) to android 10?
[LG G8 Guides, News, & Discussion] kt-Froggy:
That's actually how the seamless update is supposed to work on A/B devices by design. 🙂
[LG G8 Guides, News, & Discussion] XX_GGBOIZ_XX:
is the abl engineering file is the one linked in the post? and i only have to rename and load that file into their correct partition name? if things went wrong i can just boot back to edl and load the backup files into it right?
[LG G8 Guides, News, & Discussion] Surgemanxx:
That's correct.You have the idea.
[LG G8 Guides, News, & Discussion] rockyinho:
i'm succesfully backup both abl and replace with the modified file, i do correctly but got an issue when unlock bootloader from fastboot. device is connected but when i hit fastboot oem unlock i got stuck on waiting any devices. any idea how to figure it out, i'm using v50s with android 10
[LG G8 Guides, News, & Discussion] Surgemanxx:
Make sure you have developer options enabled,and have oem unlocked enabled before you try to unlock the bootloader.
[LG G8 Guides, News, & Discussion] ardian1899:
..nevermind

Thanks for the guide
[LG G8 Guides, News, & Discussion] miles250:
edit: wrong comment
[LG G8 Guides, News, & Discussion] keltix:
anyone please help me, i had previously flashed a OPEN_EU(EMW) on my ATT_US(UM) , its a lg g8x, and it had a lot of issues so I decided to flash again a UM software and after erasing with Q-fil I tried to go back to download mode, I got a red case error(your device has failed a routine check and will not boot) and its been like that for a very long time and im scared because i had not backup the partitions of this current rom, only the ATT ones, and not a full backup. is there any way to flash using edl mode because i can access that or just bypass this error message?? and the when the download mode loads, it just takes me to the fastboot mode
[LG G8 Guides, News, & Discussion] smopro:
lg v50s android 12 - stuck on entering fastboot. Backup fsc fsg ftm laf_a laf_b modem_a modem_b modemst1 modemst2 abl_a abl_b boot_a boot_b, load eng abl on both _a and _b and after exit from edl have download mode, not fastboot. If i flash eng abl AND erase both laf _a and _b - i have only "warning about operating system safety" (g.co/ABH) and no fastboot and no download mode
[LG G8 Guides, News, & Discussion] smopro:
trying reflash eng abl and restore laf from backup - i'm into fastboot)
[LG G8 Guides, News, & Discussion] pierro78:
thanks for the info !

very interesting as I upgraded to latest V500N40d_00_LGU (Korean U+) and lost root (but not my unlocked bootloader) ...

if someone is interested I found a detailed video on how to get root (and twrp) on a bootloader-unlocked V500N :
[LG G8 Guides, News, & Discussion] TPMJB:
I'm pulling my hair out as I've done this a bunch of times on the V50, but can't for the life of me get it working on the G8

Copied over the Engineering bootloaders to abl a and b and cannot get my phone to A)boot B)turn off or C) Boot into fastboot. The key combinations don't work for me and I can't turn the phone off to test if vol down + usb works.

Halp?

T-Mobile G8

Edit: Uhhh I flashed the original abl_a and abl_b files and not only did fastboot magically start but I was able to bootloader unlock? Wtf lol.

Edit2: Guys I seem to have a really rare firmware version that has bootloader unlock abilities. Phone came from eBay with a disclaimer that there was a user debug code on the screen.

Build number is alphalm_lao_com-userdebug 9 PKQ1.181203.001 201321203a181 test-keys

Full firmware dumped with QPST, if anyone needs it.
[LG G8 Guides, News, & Discussion] Stavinair Bluewing:
Got a new v50 thin q, got everything from patching abl a and b with the engineering file, but now I am running into the same issue as prior when trying to unlock the bootloader. And yes the device is in fastboot mode. (turns out adb in the adb provided was a mismatching client (40) instead of 41. I downloaded the official platform tools but am still having issues.)

What am I doing wrong here?
[LG G8 Guides, News, & Discussion] Stavinair Bluewing:
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.

(it's a LMG850N)
[LG G8 Guides, News, & Discussion] tdusen:
I think you need to install or re-install the LG Mobile driver. It's listed in the OP.
[LG G8 Guides, News, & Discussion] Stavinair Bluewing:
I can't seem to find those drivers on the site.
[LG G8 Guides, News, & Discussion] liuyuan458:
I can't find the abl_b file download link in your tutorial, is it only need to replace the abl_a file?
[LG G8 Guides, News, & Discussion] tdusen:
It's in the OP in the gray box

https://www.lg.com/us/support/help-library/lg-mobile-drivers-and-software-CT10000027-20150179827560
[LG G8 Guides, News, & Discussion] tdusen:
Sorry, I see your problem.

https://www.lg.com/us/support/software-firmware-drivers

select LG mobile Drivers under popular software

​
[LG G8 Guides, News, & Discussion] Stavinair Bluewing:
which driver would match my device though? (yeah it was the driver)
[LG G8 Guides, News, & Discussion] noidodroid:
Here is a few links that might help you out now and in the future.

星河官改ROM LG G8 30b 安卓11 卡刷包 VoLTE Root TWRP 本地化 精简 - yanhua-tj - 博客园

之前说了要做G8 官11精简卡刷包，国庆假期拖延了几天，哈哈 所以星河它来了，终于磨洋工做出来了(其实早就做出来线刷包，懒得写卡刷脚本) 所念皆星河 本卡刷包的特性： 精简谷歌套件保留Chrome浏览器和Play商店 默认中文语言zh-CN 加入通话归属地、联系人归属地、日期农历等本地化 解锁三网V

www.cnblogs.com

LG G8 40b 星河官改 安卓12 本地化 VoLTE Root 精简 Twrp - yanhua-tj - 博客园

简介 LG G8 官方Android12 精简系统卡刷包，终于来了，嘿嘿 ==注意：本系统包免费，若是付费获取均为上当受骗！！！== ==若有需要，可联系作者QQ有偿刷机，快捷、高效。== 所念皆星河 本官方系统定制修改卡刷包的特性： [x] 默认中文语言zh-CN [x] 精简谷歌套件但保留Chr

www.cnblogs.com
[LG G8 Guides, News, & Discussion] alialqebli:
Hello, can you unlock the bootloader of the LG G8 ThinQ ANDROID 11 AT&T
[LG G8 Guides, News, & Discussion] SomeRandomGuy212:
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.
[LG G8 Guides, News, & Discussion] tdusen:
Try "fastboot oem lock" not unlock
[LG G8 Guides, News, & Discussion] SomeRandomGuy212:
Sorry, that was a typo. I've been using "fastboot oem lock."
[LG G8 Guides, News, & Discussion] jaganeee:
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.
[LG G8 Guides, News, & Discussion] SomeRandomGuy212:
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.

That's what worked for me. Hopefully it helps.
[LG G8 Guides, News, & Discussion] jaganeee:
sure. will check and update
[LG G8 Guides, News, & Discussion] yeahman45:
can I use this guide for LG V500N running android 12?

Are the steps identical?
[LG G8 Guides, News, & Discussion] yeahman45:
did you find an answer?
[LG G8 Guides, News, & Discussion] Eglo jin:
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
[LG G8 Guides, News, & Discussion] jaganeee:
hi

i just follow this 2 methods to get in to fastboot boot

(1. Hold Vol- and Power then release power when reboot starts and keep holding vol-

2. Unplug and Power off your phone. Hold vol- and plug it in.)

everything phone start normally without entering fastboot mode. need to go for fastboot mode.

ur suggestions are most welcome
[LG G8 Guides, News, & Discussion] tobyzz:
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?
[LG G8 Guides, News, & Discussion] alialqebli:
How to unlock the bootloader of a phone LG G8 Thin G820UM. AT&T Android 11View attachment 5981747
[LG G8 Guides, News, & Discussion] liammmmnnnn:
same here, im very confused i dont have a "abl engineering file" and i used the abl_a thats on your post, and i lost touch, so i reverted it back to the backups i made, i regained touch, but im lost, can someone please help me? :) sorry for the inconvenience
[LG G8 Guides, News, & Discussion] liammmmnnnn:
*The post sorry not your post lol.
[LG G8 Guides, News, & Discussion] liammmmnnnn:
okay , good im not the only one. did anyojne find a solution?
[LG G8 Guides, News, & Discussion] hazel_kittycat:
a lot of pain in the ass and one headache later I got my LG G8 ThinQ AT&T (LM-G820UM) bootloader unlocked and rooted with magisk 26.2
[LG G8 Guides, News, & Discussion] hazel_kittycat:
your supposed to load the provided abl_a file into both abl_a and abl_b (make sure to have the original abls backed up first) it worked for me although for some reason it breaks the touchscreen untill you restore the original
[LG G8 Guides, News, & Discussion] men_stive:
Friends. Help please. Need a backup copy of LG g8x att.
[LG G8 Guides, News, & Discussion] skygunner:
If I reverse the process, can I relock the bootloader?
[LG G8 Guides, News, & Discussion] RQYP:
Sorry for necroing this but yes, the G8 Verizon FRP works (and is necessary) to bootloader unlock and root the Verizon LG V50 V450VMB. The device can boot normally even after flashing this.
[LG G8 Guides, News, & Discussion] HBO 7500:
how did you get magisk to work, i Have t-mobile with android 12
[LG G8 Guides, News, & Discussion] princearic:
I've managed to get through unlocking the bootloader, rooting, and installing twrp. I've overcome the no touch issue by using the key combo to get into recovery and regain touch. I'm almost at the finish line, but in all this research to get to this point, I have yet to see anyone with my final issue. TWRP doesn't recognize my storage and merely acts as a shell. Essentially, it won't mount the storage to allow me to do anything else.

I'm guessing maybe through the process there was a minor step I missed? Otherwise, I have the ROM ready to flash and I'd be done. I'm hoping someone has bumped into this or knows the fix for this.
[LG G8 Guides, News, & Discussion] F. Noor:
My LG V50 ThinQ Verizon Model has no Oem Unlock button in Devloper option. plz help
[LG G8 Guides, News, & Discussion] men_stive:
Hello everyone. Who can help? Need an lg g8x AT&T dump.
[LG G8 Guides, News, & Discussion] RQYP:
You can bootloader unlock the Verizon variants without "OEM unlock" in developer options.
[LG G8 Guides, News, & Discussion] ReallyBadDev:
The driver website isn't working anymore. Does anyone have the files?
[LG G8 Guides, News, & Discussion] froiaa:
mine says

FAILED (remote: 'Flashing Unlock is not allowed

')

fastboot: error: Command failed

i tried this 5 times and still my Lg V450 is not working with these i also enable the debugger and still failed flashing haha i want a custom rommmm ive been using samsung phone for the last 6 years and i flash any rom as long as i want but this lg this making me uhhhh

i there anyone like LG v450 did this tutorial what did you do haha
[LG G8 Guides, News, & Discussion] Squeeto:
The first page shows a download link QFIL that points to QPST_2.7.496.zip.

Does this QPST executable ever get used or does it provide a driver or ..?

edit- okay I installed Win7 on an old laptop. So now I can see that QPST gives tools, one of them is the QFIL that we use.
[LG G8 Guides, News, & Discussion] ned14:
I can confirm that this guide works for a Verizon LG V50 ThinQ LM-V450VM with latest Verizon Android 12 firmware on it. You will need a real Intel PC running x64 Windows. I tried it from a VM, no go. I tried it from an ARM64 Windows where everything appeared to work thanks to Intel emulation, also no go. I actually didn't have an x64 CPU running Windows any more, so I had to pull an old PC out of storage and reinstall it. Anyway, got there eventually.

After this guide your V50 will think it is a G8, but it doesn't seem to affect anything. All hardware works, and the screen has the right (very high) resolution.

I got LineageOS 18.1 installed and it's working great. Many thanks to the OP and everybody else for making this available.
[LG G8 Guides, News, & Discussion] Squeeto:
Okay, I have the V50 bootloader unlocked.

Since I have a Korean LM-V500N, I use the standard TWRP 3.3.1 and not the USA version?

I want English if possible.
[LG G8 Guides, News, & Discussion] stereoactivo:
Found this one in another comment, it worked

V30 US998 bootloader with no fastboot commands

Hello, I just got a used V30 US998 from B&H Photo, my first LG phone. I tried to unlock the bootloader but when I reboot into bootloader I get this screen that says Welcome to fastboot for bootloader unlock (image bellow) but no fastboot...

xdaforums.com
[LG G8 Guides, News, & Discussion] Faylynx:
My phone is stuck in bootloop:

To enter download mode plug into computers usb port and reboot phone holding vol down and power key when screen goes black release both keys and hold vol up

does that take you into download mode?
[LG G8 Guides, News, & Discussion] justanutt:
I actually just hold the volume up button when it bootloops and it will go into download mode.
[LG G8 Guides, News, & Discussion] Faylynx:
Oh, I see, well earlier I got out of it by going back to EDL mode and using qfil to put the engineering abl_a on slot a and b. I think you must restore the backups with fastboot because I tried doing that with qfil and it didn't seem to work, but after letting it sit booted up in the engineering mode I guess it LG updated over the air because I had removed Sprint bloatware and thats what cause my bootloop, then after letting it sit in the engineering abl boot I went back to fastboot and restored the backups of abl a and b, then it boot and for a while the touchscreen was unusable, I think or it could've just still been loading, then sometime later it went through the set up touchscreen working and all and now when it boots it shows the LG boot logo not sprint! Anyhow that worked and my bootlooped spring phone is back. I will be following a guide I bookmarker on how to identify partitions and make img backups now, I found one that has that part in the instructions for the LG g8.
[LG G8 Guides, News, & Discussion] Keke.ua:
Friends, even after reinstalling the drivers for those that our friend threw off, the problem remained on g8 sprint. Please make an archive of all files and utilities that were used to unlock g8 sprint
[LG G8 Guides, News, & Discussion] justanutt:
I can not get into fastboot on my phone. Is there a file i need to do that, because the button dance isnt working?
[LG G8 Guides, News, & Discussion] justanutt:
Ok I got into fastboot, now no active slots. What can I do?
[LG G8 Guides, News, & Discussion] Faylynx:
oh well then it may be a minute but I can follow this guide:

Comprehensive Guide to Unlock The Bootloader on Sprint LG G8 ThinQ

In this tutorial, we will show you how to unlock the bootloader on Sprint LG G8 Thinq using the privilege escalation exploit technique.

www.getdroidtips.com

and since I have a Sprint G8 the partitions should be flashable :)

I'll just skip to backing up the partitions since the earlier part of the guide refers to an earlier firmware and process used for that that didn't even involve qfil

you probably should have this https://www.python.org/downloads/release/python-392/

and even though it's not in this guide I am pretty sure there is a python dependency to be installed ; a microsoft package which doesn't seem to be needed with this version, I used a different version awhile back...
[LG G8 Guides, News, & Discussion] Faylynx:
Well, I tried to root my phone again and failed, re-entered bootloop and discovered from fastboot you can flash the backups- so I did these three lines

fastboot flash abl_a abl_a.bin

fastboot flash abl_b abl_b.bin

fastboot flash boot_b boot_b.bin

This doesn't work with qfil for some reason that I do not know.

if you have backups try flashing them all including boot_a

if you don't you can try my backups since we both have sprint g8 I can upload my abl_a & b boot a & b backups.

I can no longer flash magisk although I do believe I would have to try doing every step from the beginning step by step instead of trying to from this point on skipping steps but I'm finished trying lol
[LG G8 Guides, News, & Discussion] justanutt:
I actually have Verizon, sorry pretty sure that will not work.
[LG G8 Guides, News, & Discussion] johnnycm77:
Ive got one

Is it possible to downgrade the Verizon g8 from 10 to pie?
[LG G8 Guides, News, & Discussion] justanutt:
I believe so if you use lgup
[LG G8 Guides, News, & Discussion] johnnycm77:
Cause I'm wondering if that's the only way this is gonna work for me.
[LG G8 Guides, News, & Discussion] johnnycm77:
Another reason I was asking is because I'll be going from 20i to10g I believe