yashsingh1/xdaforums huggingface dataset:
[LG G8 Guides, News, & Discussion] S_32:
Hello, I've successfully completed this procedure on one LG G8, but I'm having difficulty with the second one. I'm not able to enter into fastboot after replacing abl_a and abl_b with the abl engineering file. It just gets to the LG G8ThinQ splash screen and stays there.

The holding vol- and power, release power on reboot method didn't work, and I'm unable to use the alternate (plug in + vol-) method because I can't actually find a way to turn the phone off that doesn't just immediately reboot it while the engineering abl's are in place.

I was able to revert to my backup abl_a/b files and return the phone to it's previous state, but I'd like to complete the procedure if possible.

EDIT: Found this explanation from AsItLies on page 26 that helped me enter into fastboot.
[LG G8 Guides, News, & Discussion] corruptnova:
Hello all, I am having an issue with getting back into EDL mode to flash the patched magisk image.

I have a LM-G850UM (or, a Sprint LG G8x). The bootloader is unlocked, but when I try to do the button combo (pwr+vol down then keep tapping the the vol up button once the screen turns off) but, It just boots to the LG logo, the screen about the device's software can't be checked for corruption, the Sprint logo animation and then into Android. I've tried holding the vol up button instead of tapping it repeatedly and switching USB ports and cables with no success.

I'm at least happy that my phone isn't bricked, but I'm getting quite frustrated at trying to figure out why it won't boot into EDL mode anymore.

Any thoughts or solutions would be greatly appreciated!
[LG G8 Guides, News, & Discussion] AsItLies:
That's pretty typical, it takes a kind of precise second that you start tapping the vol up. Once you get used to it it gets easier.

Try this; with phone off, plug in usb and wait for the charging symbol thing to start flashing, then hold pwr and vol dn and start tapping vol up. Sometimes I've found it's easier that way.

But here's the thing about it; You can get to edl mode from any point, even if it's bootlooping, it's just a matter of getting the timing right as to when to start tapping vol up.
[LG G8 Guides, News, & Discussion] corruptnova:
Thank you so much for replying! I'll keep trying once I have some time.

I had one more question about patching boot ing (_b) in my case. Should "Preserve force encryption" be ticked or unticked in Magisk Manager when making the patched file?
[LG G8 Guides, News, & Discussion] AsItLies:
I've always unticked that, when creating a patched boot image. Seems logical as you're going to flash dm_verity etc after booting with it.
[LG G8 Guides, News, & Discussion] S_32:
Hello, I screwed up trying to apply the magick root, and now I'm stuck in a boot loop.

I backed up my boot_a and boot_b, and then had magick patch my backed up boot_b (phone on slot _b according to fastboot). This resulted in a boot loop. I tried to fix the problem by foolishly pushing my backed up boot_a AND boot_b to the phone, but that still resulted in a boot loop.

The problem I think is, I accidentally allowed the phone to update from android 10 to 11 between making my boot backups, and when I tried to complete the root. My understanding is this likely made my backups obsolete, and unable to complete the boot.

Now I'm stuck. Any advice on how to recover from this mistake?

EDIT: If it's possible to just use someone elses boot_a / boot_b: My phone is an LMG820TM, it's a US phone, and had the most recent OTA android 11 update. If other info is needed please let me know.
[LG G8 Guides, News, & Discussion] KheniKheni:
I might be in deeper trouble than I think. Cant get my phone into EDL mode although I can get it into download mode
[LG G8 Guides, News, & Discussion] KheniKheni:
I DID IT! Phew! Thanks
[LG G8 Guides, News, & Discussion] KheniKheni:
Which one is the engineering file please?
[LG G8 Guides, News, & Discussion] KheniKheni:
Again, which file is the engineering file for abl_b please?
[LG G8 Guides, News, & Discussion] KheniKheni:
Stuck here, can't get past this stage to Fastboot using both methods. But when I go into downlaod mode I get the attached screenshot. What should I do next please?
[LG G8 Guides, News, & Discussion] dolimpioa:
Must it be Android 10, or at least Android 10. I have Android 12.
[LG G8 Guides, News, & Discussion] KheniKheni:
My phone goes right back to android robot, no command screen. Can't shut down with power button
[LG G8 Guides, News, & Discussion] AsItLies:
No matters what state the phone is in, looping etc, most times you can still get to edl mode.

The only difference will be that you won't get a 'count down' screen, you'll just have to 'time it' yourself.

So experiment with it, to get the timing right, of when to start spamming vol +, you should be able to eventually get it into edl mode, then flash whatever necessary partition(s) to get it out of the situation you have now.
[LG G8 Guides, News, & Discussion] KheniKheni:
Thank you very much. I'm able to get into edl and download mode. I had to really work on my timing as you said
[LG G8 Guides, News, & Discussion] dmmercado23:
I had this problem with my v50 Kt variant on A12, i downgraded to A11 then repeat the process on unlocking. You can just reboot your device by holding Power and vol down. The phone will just boot normally. Just restore stock abl_a and abl_b before downgrading android version.
[LG G8 Guides, News, & Discussion] dolimpioa:
fastboot - < waiting for any device >

or

"fastboot devices" returns nothing

I just spent days digging through forums looking for a solution and even installed Windows 7 on an old laptop as some suggested, without success.

On Windows 10 the issue seems to be that the bootloader driver is not loaded. You can see a device simply called Android on the Device Manager page that is disabled due to the lack of a driver.

My search for a driver was unsuccessful but discovered that the driver was actually on the PC. Windows had just decided that it was not recommended. However you can force it to be installed with the steps below. Note that these stpes must be repeated every time you enter fastboot mode. Windows does not remember that you said the driver was Ok.

1. Access Device Manager (right-click on My Computer in explorer and click Manage)

2. Find the disabled Android device, right-click on it and select Update Driver

View attachment 5726101

3. Select Browse my computer for drivers

View attachment 5726103

4. Select Let me pick from a list of available drivers

View attachment 5726105

5. Select Android Device

View attachment 5726109

6. Select Android Bootloader Interface

View attachment 5726107

7. Select YES to Warning

View attachment 5726111

8. fastboot devices should now return your device
[LG G8 Guides, News, & Discussion] dolimpioa:
Forgive me if this should be in another forum because this procedure seemed to work but was disrupted by another. I just thought that the expertise here could be helpful.

I followed this procedure and was able to unlock and root my AT&T LG-G8.

I then followed the procedure to install TWRP - https://unofficialtwrp.com/lg-g8-root-twrp

TWRP installed ok, but root was lost. When I tried to flash Magisk using TWRP I received an error stating the partition was read-only.

When I rebooted I received and error, and although I do not recall the exact working the only option was a button labeled "reset phone", which said would perform a factory reset. I clicked the button, but the process never completed. I forced a reboot only to come back to the same error. Eventually I booted into EDL and used QFIL to flash the abl and boot files from my backup.

Now the phone boots normally and it is still unlocked, but root is lost. When I try to get into recovery (twrp) is get a dead android robot with "no command" under it.

I tried re-flashing the Magisk modified boot file the phone gets stuck in a boot loop with the AT&T logo continuously animated. I even tried creating a new Magisk modified boot file without success.

Things to note:

1. The instructions for TWRP say to download Magisk v23, which is what I had initially done, but it asked if I wanted to upgrade to the latest, V25, which I did. Not sure if this was a good idea or not. I've since tried creating newly modified boot files with both versions without success.

2. Before flashing Magisk with TWRP to regain root, the instructions say to "wipe user data". There were a number of options under "Wipe", not of which seem to relate to "user data", so I wiped with the default options selected. Again, not sure of that was correct.

Current state:

Phone is working fine and is unlocked according to fastboot and the warning message when booting.

If I install the Magisk modified boot file, I get a boot loop.

Boot into recovery results in a dead robot.

Any ideas or suggestions??

Thanks in advance for any help!
[LG G8 Guides, News, & Discussion] KheniKheni:
sure, thanks. I've been advised to simply flash a new kdz using the instructions attached. Seems to be working, just got a few more errors to get past. Will let you guys know how it goes over the next 24 hours; hopefully.
[LG G8 Guides, News, & Discussion] KheniKheni:
Many thanks for this extra info, I'll try that too
[LG G8 Guides, News, & Discussion] CodeFail:
Good Morning, Im having an issue rooting my phone, I have a ATT lgg8 thinq, adb detects it but I cant use it to boot into anything just reboorts the phone normally. also when i am able to get it into EDL mode i see QUSB_BULK_CID in "other devices" and not under port, so Qpst wont detect it. Any help would be great ty.
[LG G8 Guides, News, & Discussion] AsItLies:
you shouldn't be using adb to try to boot into bootloader, or anything else. The phone doesn't have that ability without the 'engineering abl'.

to get that eng abl on the phone, you have to get EDL and qfil to work properly. It sounds like you don't have the drivers installed correctly for it. Look at that more closely / follow specifically the directions for it.

Once accomplished, we simply flash the eng abl to both abl a and b, then go directly from edl / qfil to fastboot, using the key combo, then you can 'fastboot oem unlock'.

good luck.
[LG G8 Guides, News, & Discussion] froutanramin:
how i can unlock in Android 9 ⚠️ ?

because there is no android 10 or upper version for my ARE region code G8s
[LG G8 Guides, News, & Discussion] AsItLies:
You should be able to do it the same way for any version. The thing to understand about the process; you are going to use an 'engineering' abl, that's a version of the normal abl but has fastboot in it.

So, yer not going to use it to boot the phone, yer not going to do anything with that special abl but one thing, to unlock the bootloader. So, it will work on any version of android because it's not meant to boot the device, it's only meant to use qfil, flash it to the correct partition, go directly to the bootloader from qfil, unlock bootloader, and then use it to flash the original abl back.

done.
[LG G8 Guides, News, & Discussion] Zeph016:
Thank you so much! I followed the instructions and bootloader unlocked flawlessly my LG G8 Verizon Crimson red.
[LG G8 Guides, News, & Discussion] froutanramin:
i did 1 time . i got stuck logo on boot , maybe i did some steps wrong . want to try one more in November when android 12 will release . its crazy why lg not published even android 10 for my region
[LG G8 Guides, News, & Discussion] jian1:
Hi, a question that seems never been asked:

I want to unroot and relock the bootloader since Google wallet totally does not act well, any steps?

Should I first magisk uninstall, then fastbook oem lock, and last step to flash engineering adl_a/b back to relock boot loader?

Thank you
[LG G8 Guides, News, & Discussion] Thenitoxdd:
Can you please help me, have the same model and can't do it
[LG G8 Guides, News, & Discussion] Zeph016:
What part of the guide are you having problems?
[LG G8 Guides, News, & Discussion] poteto15:
hola, tengo un problema. Sigo todos los pasos al pie de la letra y va bien hasta llegar a la parte de desbloqueo. Cuando pongo "fastboot oem unlock" me dice "FAILED (remote: 'Flashing Unlock is not allow". ¿Alguien tiene alguna solución? Es la versión de verizon.
[LG G8 Guides, News, & Discussion] poteto15:
Hi, I'm having a problem. I follow all the steps to the letter and it goes well until I get to the unlock part. When I put "fastboot oem unlock" it tells me "FAILED (remote: 'Flashing Unlock is not allowed". Does anyone Do you have any solution? It is verizon version.
[LG G8 Guides, News, & Discussion] Zeph016:
Did you flash the frp_verizon.img and rebooted to bootloader again? Make sure to also use an original or verified data cable. Fake ones or super cheap cables sometimes do not carry data.
[LG G8 Guides, News, & Discussion] poteto15:
No, I don't know how to do it right, how can I do it? I think I just bricked the phone. since it lost the touch and it gives me an error message that I can't read. and the cable is the original
[LG G8 Guides, News, & Discussion] Zeph016:
You said you followed the guide? It's on there before flashing "fastboot oem unlock"

* 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
[LG G8 Guides, News, & Discussion] alquimico:
Have the same trouble testing diffrent drivers, I did what you suggest here carefully and still unable to have fastboot mode working for unblock bootloader on LG V50. Any other tip or advice mate?
[LG G8 Guides, News, & Discussion] froutanramin:
Back abl file = done

replace abl_a & abl_b = done

after reboot my phone stuck in boot logo . and i cant go to fastboot mode . what can i do now !?
[LG G8 Guides, News, & Discussion] AsItLies:
Well read the directions, for one.

You should be using the specific keys to go to fastboot directly from EDL, you should NOT be trying to boot the phone. As said, it WONT boot the phone, it's not the right version of Android.
[LG G8 Guides, News, & Discussion] froutanramin:
im try but i cant . volume down and power keys to fastboot not working after abl changed . there is some tricks !
[LG G8 Guides, News, & Discussion] AsItLies:
the way it's suppose to work is to hold the pwr key until you hear the windows 'chime' sound, that means you've disconnected from EDL.

Right after you hear the 'chime', release pwr key and hold vol minus key, that should then take you directly to fastboot.

Keep in mind, you have to flash the engineering abl to both abl a and abl b. This is because you don't know which 'slot' (a or b) is currently 'active'. So, if you only flash it to one of them, it may be the other one that is actually booting, thus it won't work.

Also, when backing up both a and b, be sure to name them appropriately, to return them to where they were, as they may be different versions of android.
[LG G8 Guides, News, & Discussion] Marbini:
Hey i need help:(, after unlocking the bootloader i got stuck in a screen in corean and cant seem to access the phone, i have a lgv50 skt version
[LG G8 Guides, News, & Discussion] Marbini:
So i think the device has been reported to be lost after i unlocked the bootloader(?, and i cant seem to find a solution, here is an image of the screen that im having on my phone, does someone know what can i do?, my plan was to change rom, i can access to edl and fastboot tho.

help pls

edit- the image is from google. i cant upload a photo rn
[LG G8 Guides, News, & Discussion] bexiu:
aw, painful
[LG G8 Guides, News, & Discussion] bexiu:
Finally, I succeed

acident I deleted keychain root/system/app android because I thought it is keyboard of LG, now my can't run, it loop logo boat

what should I do? can you help? my phone:

lg g8 think Q, android 10

LMG820UMP

series lmg850um8535bcd
[LG G8 Guides, News, & Discussion] zfk110:
Do you have to be on Android 10 to do this? I planning to buy one V50, which model should I get with which OS? as I know V40s you can't root Tmobile one.
[LG G8 Guides, News, & Discussion] wilder666:
hi can anybody help me?

im trying to unlock bootloader LMG820N and stuck at this stage

"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."

my pc device manager doesn't even recognize my phone in a fastboot mode.
[LG G8 Guides, News, & Discussion] kt-Froggy:
https://xdaforums.com/t/guide-lg-g8...isk-root-using-firehose.4221793/post-87004221
[LG G8 Guides, News, & Discussion] HoKhoa07:
does it work on G820TM (T-Mobile variant) ?
[LG G8 Guides, News, & Discussion] zfk110:
I bought this LG v50 and it is a Sprint phone I use the guide to root and unlock the bootloader for the TWRP and magisk while running on Android 11

I found Android 13 running rom I was told to upgrade to Android 12 and then flash the rom because it will not work with Android 11

I was trying to cross flash from Android 11 to 12 using crossflash method but I could not do it because I was getting that 0x6004 error on xda same people suggested if I erase boot, vendor, product partition as well that will that error I try that too and it didn't work I was still getting that same error when I try different LG up

Someone told me on the telegram group just flash Android 12 kdz on it since I could not cross flash from 11 to 12 using crossflash

Without realizing that I had Sprint I used and flashed Verizon Android 12 kdz using LG up

Now when I try to boot up it just flashed lgv 50 logo and goes into the boot loop

I can still go into edl mode also I can go to download mode and I try to use unbrick guide to flash those files manually and after doing that phone does the same thing it would not boot just goes to the boot loop

So this is the situation I'm in
[LG G8 Guides, News, & Discussion] Bons007:
Congs! I Successfully Unlocked Bootloader of my lg g8 um verizon with magisk root, thanks a lot, i also have crossflashed Verzon to open_Can.

But i have serious Problem about Magisk root i.e When i try to root my lg g8 with magisk manager v8.0.7 (out dated) its working fine but we need everything in work like zygisk n lposed so i tried latest magisk app v25.2 by using your method(i tried magisk v25.2 latest after fresh crossflash n factory reset) so my LG G8 Stuck at LG G8 THINQ LOGO ( sometime its screen just go blank at screen lock) my PC was Detecting its storage and ADB Was working(luckily i turned it on) so i tried all cmds to recover this but at last i got my phone into EDL MODE Using blind eyes bcz screen was working but no display after edl i flashed backed up boot_a/b but still same thing then i flashed stock rom in LG UP Which solved this issue so i again tried same magisk v25.2 and same thing happen screen goes black at lock screen so again i flashed stock rom. at last again i rooted my phone with old magisk manager v8.0.7 and now its working fine but i still want latest magisk on my phone with all latest features tell me solution.
[LG G8 Guides, News, & Discussion] rhythm_dx:
Did you ever get this issue resolved? If not, which version of Android (9, 10, 11?) are you on, and which firmware (i.e. 20c, 20j, etc.) ?
[LG G8 Guides, News, & Discussion] Bons007:
Yes any ROM 1st install old v22 all ok then update it normally but watch tutorial how to update
[LG G8 Guides, News, & Discussion] vtdone:
Thanks to

@cloud1250000 and​

@Seasee606​

I got my lg-g8x rooted on A10 G850UM20j. Hopefully A10 will stay working fine for a long time.
[LG G8 Guides, News, & Discussion] haunting_slime:
I'm kind of at my wits end trying to figure this out.

I have a sprint, US G8 that I have been trying to unlock the bootloader and root. I made it through this guide and fastboot says I am unlocked, and i have installed magisk but my touch screen does not work at all. I have to use a USB C dongle and connect a mouse and keyboard to get it to function.

It came with android 12 so I am attempting to downgrade to 10 so I can get lineage on there.

I'm going to go out on a limb and say maybe I screwed up the abl_a/_b step? I also did not back up the original abl_a and b so at this point I may be screwed

what would cause my screen to no longer register a touch in this case?

Thanks.
[LG G8 Guides, News, & Discussion] kt-Froggy:
Yes, the touch is lost when you flash the engineering abl - that's OK, as it's only intended for the BL unlock process (enabling fastboot), and you are not even expected to boot up the phone in that state. If you don't have a backup of your abl partitions, you definitely screwed up that step, because you have to restore the backups after unlocking the BL - that's why the guide tells you to back up abl_a and abl_b in QFIL before proceeding any further. Did you flash the engineering abl to both A and B slots, or to just one? If just one, you still have a chance to save the original abl that you didn't replace in the other slot, and restore it.
[LG G8 Guides, News, & Discussion] haunting_slime:
Thanks for the reply, I flashed both abl on mine. Is this a brick then?
[LG G8 Guides, News, & Discussion] kt-Froggy:
Not sure... I hope someone with more knowledge than me can comment and possibly provide some good suggestions. I haven't been in a scenario like this with no backup. Basically, you need to get an image of the proper abl partition for your phone/ROM. However, even if it is considered a brick, take a look here:

https://xdaforums.com/t/tutorial-rescue-from-hard-brick.4351389/

This guide gives you all the steps to recover from a situation with corrupted or deleted partitions - even all of them. If you can't find an easier way out, this should help.
[LG G8 Guides, News, & Discussion] yeahman45:
does it work for verizon unlocked lg v50?

the LMV450VMB?
[LG G8 Guides, News, & Discussion] gecpogi:
Will this work with Android 11?
[LG G8 Guides, News, & Discussion] kt-Froggy:
Yes. I followed this guide on A11 (G8, US Cellular).
[LG G8 Guides, News, & Discussion] gecpogi:
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.

May I ask what this is? Is this the one I backed up? Or the one I downloaded?
[LG G8 Guides, News, & Discussion] gecpogi:
Mine shows restart bootloader not unlock
[LG G8 Guides, News, & Discussion] haunting_slime:
You flash the engingeering abl (one you downloaded) or "load" it after you right click on the abl_a in partition manager.

If you are trying to do this on slot b, then do it for abl_b (just edit the name)
[LG G8 Guides, News, & Discussion] Chris3445:
Hello I got my LG g8x rooted and everything but I cant get twrp to work with touch i did followed this guide to a tea and a nother one and I still cant get use touch in twrp hope some can help with this thanks
[LG G8 Guides, News, & Discussion] haunting_slime:
for a quick fix, plug a mouse into your phone. If you are sure you did the flashing steps 100% correctly....
[LG G8 Guides, News, & Discussion] Chris3445:
Thanks for the reply im at work rite now and wen I get home i will try that and report back thanks again
[LG G8 Guides, News, & Discussion] Chris3445:
This is what is happening and i Dont see the internal memory in the recovery either im rooted still to u have the bootloader unlocked as well I just dont now what im doing wrong