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How to Unlock Bootloader and Root Lg G8x (Video Guide)

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[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
All fix avilable (no network solved)

Watch it carefully
do it step by step as showen in my video you will never brick if you follow my video :):love:

All required files are in the video description

This guide Tested on the firmware (20e ,20c,20d) (if you didn't see your firmware don't worry leave a command , I will help you ! )


How to check the frimware:
* Go to Settings - >System -> About phone -> sofware version ( eg: V20e-IND-XX so use 20e rootboot file)

All required files are in the video description



watch it in 720p only 40 mb

subscribe for more lg g8x content !!!
(y)

If any issue let me know i will help you with that:)
 
Last edited:

cyr4n0

Member
Feb 16, 2013
18
2
I've rooted with Magisk and root seems to be working. I then restored the abl_a back to abl_a and abl_b partition. Now I keep getting system UI crashes and the phone app freezes when I try to make a call.
 

[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
I've rooted with Magisk and root seems to be working. I then restored the abl_a back to abl_a and abl_b partition. Now I keep getting system UI crashes and the phone app freezes when I try to make a call.
looks like your device is not a 20e firmware (audio not work,cant make a call ,ui crash) i will help you to root just share the boot_a img (stock)
 
Last edited:

rainbowtuba

Senior Member
Sep 13, 2013
90
25
looks like your device is not a 20e firmware (audio not work,cant make a call ,ui crash) i will help you to root just share the boot_a img (stock)

Hello,

I have the exact same issues. Didn't notice the Indian variant on Magisk in the Root guide, and ended up with an unusable phone.

You say boot_a image stock, do you mean from before the whole process? I unfortunately didn't back up this particular partition..

Boot.zip contains the boot.img file pulled from the kdz of the US G850 20b.I don't know if this is useful, but I got it...

ReadData_.ufs_Lun4_...... is the boot_a file pulled from my phone after I turned it into a buggy mess 😅 I also don't know if this helps, but I do need help getting my phone working again if you'd be so kind. This is NOT the boot_b flashed as boot_a like mentioned in the video.
 

Attachments

  • boot.zip
    162 bytes · Views: 62
  • ReadData_ufs_Lun4_0x1470a_Len24576_DT_06_12_2020_11_39_20.zip
    24.3 MB · Views: 68
Last edited:

[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
Hello,

I have the exact same issues. Didn't notice the Indian variant on Magisk in the Root guide, and ended up with an unusable phone.

You say boot_a image stock, do you mean from before the whole process? I unfortunately didn't back up this particular partition..

Boot.zip contains the boot.img file pulled from the kdz of the US G850 20b.I don't know if this is useful, but I got it...

ReadData_.ufs_Lun4_...... is the boot_a file pulled from my phone after I turned it into a buggy mess 😅 I also don't know if this helps, but I do need help getting my phone working again if you'd be so kind. This is NOT the boot_b flashed as boot_a like mentioned in the video.
The one you provided was not help ,Give me the stock boot_a img (download the whole kdz and extract the boot_a.img)
 
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Reactions: YASHWANT DHAKAD

[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
Hello,

I have the exact same issues. Didn't notice the Indian variant on Magisk in the Root guide, and ended up with an unusable phone.

You say boot_a image stock, do you mean from before the whole process? I unfortunately didn't back up this particular partition..

Boot.zip contains the boot.img file pulled from the kdz of the US G850 20b.I don't know if this is useful, but I got it...

ReadData_.ufs_Lun4_...... is the boot_a file pulled from my phone after I turned it into a buggy mess 😅 I also don't know if this helps, but I do need help getting my phone working again if you'd be so kind. This is NOT the boot_b flashed as boot_a like mentioned in the video.
Or you can flash the kdz back (make sure you are using the correct KDz
 

rainbowtuba

Senior Member
Sep 13, 2013
90
25
How do I flash the KDZ? I have tried pushing it with LGUP but it hasn't been successful.


Also, I've extracted the kdz with LG Firmware Extract but I'm not seeing a boot_a.img. The closest thing I see is boot.img_257490


I think I'm stuck now. I tried to use LGUP but now I can't even boot into anything but fastboot. Now it fails the security check and goes into fastboot. Unlocking the bootloader doesn;t work now and it's stuck on locked...



BTW, I renamed the boot.img_257490 and tried to flash it via fastboot but the error was "sending boot_a - too large" so I think this IS the boot_a. Not that it may matter for me at this point lol
 
Last edited:

[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
How do I flash the KDZ? I have tried pushing it with LGUP but it hasn't been successful.


Also, I've extracted the kdz with LG Firmware Extract but I'm not seeing a boot_a.img. The closest thing I see is boot.img_257490


I think I'm stuck now. I tried to use LGUP but now I can't even boot into anything but fastboot. Now it fails the security check and goes into fastboot. Unlocking the bootloader doesn;t work now and it's stuck on locked...



BTW, I renamed the boot.img_257490 and tried to flash it via fastboot but the error was "sending boot_a - too large" so I think this IS the boot_a. Not that it may matter for me at this point lol

wait ill share you my lg up and kdz extractor.
and are you sure you downloaded the correct one?
 

[email protected]

Senior Member
Jul 1, 2020
81
48
Palakkad
LG G8X ThinQ
Now that I'm trying it again, it's failing to pull it. The DZ seems to pull from the KDZ, but anything from the DZ fails with an incorrect header check error. It's a blank file. I'm sure you noticed that before I did.
use this
 
Last edited:

rainbowtuba

Senior Member
Sep 13, 2013
90
25
use this
Thank you, here is the boot_a.img


EDIT: I have potentially good news! I was completely stuck in a boot loop, but using the files from the KDZ (modem_a, modem_b, boot_a,boot_b, abl_a, and abl_b) and pushed them each with fastboot. The device restarted (with sound!) and it is resetting to stock now. We'll see what happens!
 

Attachments

  • boot_a_G85020b.zip
    24.1 MB · Views: 69
Last edited:

nate0

Senior Member
Mar 27, 2015
919
142
wlxdev.blogspot.com
I own a LG G8x Sprint fw model with SW version g850um20f build qkq1.200216.002 with April Security patch. I unlocked the bootloader with this method after I sim unlocked it today. Interestingly I have now a T-mobile splash screen perhaps because I tested the sim unlock with my t-mobile sim? Either way it provisioned all the T-mobile operator software so it got rid of all the Sprint garbage and loaded volte wifi calling etc...I have yet to test all the features but it did it all for me after the factory reset happens when the boot loader unlocks. I did not load the original abl_a abl_b backup files back to the device. Was the patched abl file a US model dump?
 

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  • 11
    All fix avilable (no network solved)

    Watch it carefully
    do it step by step as showen in my video you will never brick if you follow my video :):love:

    All required files are in the video description

    This guide Tested on the firmware (20e ,20c,20d) (if you didn't see your firmware don't worry leave a command , I will help you ! )


    How to check the frimware:
    * Go to Settings - >System -> About phone -> sofware version ( eg: V20e-IND-XX so use 20e rootboot file)

    All required files are in the video description



    watch it in 720p only 40 mb

    subscribe for more lg g8x content !!!
    (y)

    If any issue let me know i will help you with that:)
    1
    Hello,

    I have the exact same issues. Didn't notice the Indian variant on Magisk in the Root guide, and ended up with an unusable phone.

    You say boot_a image stock, do you mean from before the whole process? I unfortunately didn't back up this particular partition..

    Boot.zip contains the boot.img file pulled from the kdz of the US G850 20b.I don't know if this is useful, but I got it...

    ReadData_.ufs_Lun4_...... is the boot_a file pulled from my phone after I turned it into a buggy mess 😅 I also don't know if this helps, but I do need help getting my phone working again if you'd be so kind. This is NOT the boot_b flashed as boot_a like mentioned in the video.
    The one you provided was not help ,Give me the stock boot_a img (download the whole kdz and extract the boot_a.img)
    1
    1
    Yes it works on sprint. I did it on 20j the latest update. I disabled zram and am using a 3G swap file with swappiness of 8... So it's only used when memory is low. Works great!

    Once you're in magisk make sure to install this zip to clear safety net for Google play. https://forum.xda-developers.com/t/magisk-module-universal-safetynet-fix-1-1-0.4217823/page-8
    Edxposed modules would make me fail so I ended up just using magisk

    There's also a turbo charging script which let's the phone charge fast even when the screen is on! I can't find the thread so here's the zip attached for that. No issues with heat... And anyway it'll automatically throttle if the phone is hot. Better than always limiting the speed to 1000ma while screen on!

    Also, stay away from ktweak, it made me lose my data once due to reboots. I still use some of the mods from that script, see attached file if interested.

    My swap script is in tasker , started by a boot profile
    but you can see how it's done by looking at the xml... And make your own script, or you can use apps2sd, but other swap apps were problematic for me.
    Hello thanks for your response. I just wanna make sure before I attempt this on 20J sprint. You were able to follow this guide with all the same files? didn't need to substitute anything? Like won't we need to find the Boot.img of our specific rom (20j) and magisk patch it? then the rest of the files should work fine right? Can't find 20j firmware for the life of me
    1
    Hello thanks for your response. I just wanna make sure before I attempt this on 20J sprint. You were able to follow this guide with all the same files? didn't need to substitute anything? Like won't we need to find the Boot.img of our specific rom (20j) and magisk patch it? then the rest of the files should work fine right? Can't find 20j firmware for the life of me
    I couldnt find any KDZ for sprint.. just a generic canada 20e image.
    Follow the steps to unlock bootloader. flashing their file to abl a and b.. then flash back your abl A and abl B backups. Also backup the boot a and B for later to patch for magisk.
    Read the multiple guides to be sure you got the sequence right. Theres a few threads, see below for the links
    Find out which partition is in use - my case _B. Back in android, install magisk manager and use that to patch the boot_B in my case. Go back to qualcomm mode and flash the boot img onto your phone. Voila!

    You will lose all data which was mentioned.

    Bootloader unlock threads, not including this one.

    And this one for bootloader and then root