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

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AntonioxD90

New member
Feb 17, 2021
2
0
[QUOTE = "rjohnson2, publicación: 84512591, miembro: 4639441"]
Gracias, ¿sabes si hay alguna forma de lograrlo una vez que tengamos desbloqueo y root?
[/CITA]
Entonces solo me sirve este proceso para ser root? :((
 

luffyacekun

Member
Feb 19, 2021
6
0
Hi, Thank you for the tutorial. I have rooted my phone once. My phone is v50 sprint. I follow another tutorial to remove sprint's bloatware and bootup animation.
I've use magisk to flash twrp (and lost root), then twrp some how cannot mount my storage so I cannot flash anything.
I decided to go back qfil to flash magisk back but after flash magisk image I've got bootloop.
I went back to qfil and flashed stock boot_a.bin. then I can boot but there is something strange. the sprint's boot animation disappeared, my phone show LG's boot animation.
Now i can totaly using my phone but I cannot root it one more time. follow the button combine to fastboot will direct me to the recovery (image 2: something like this, this is not my phone, I downloaded this image from internet)
I've tried to patch my boot_a.bin again using magisk manager but still get bootloop.
I have lost my fastboot menu, is there anyway can I get it back?
p/s: I am not a native speaker, so if there is some thing hard to understand, please let me know.
 

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Gamercoolss

New member
May 27, 2020
1
0
Jakarta
Please anyone, how to solve this error? im stuck right now
ERROR:function:sahara_rx_data:276 Unable to read packet header. Only read 0 bytes.

this is the full log
 

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mangojain

Senior Member
Jul 24, 2010
151
9
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

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.
Are you even aware that many G8 models do not allow booting into fastboot? Your post should carry a very strong warning at the top regarding this point.
I nearly bricked my phone trying this procedure , and where were you when I asked for help to flash back the stock rom??
You get a double thumbs down from me!
 
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Faylynx

Member
Apr 10, 2020
26
7
I'm working with Sprint g8 Thinq LM-G820UMKIT on Android 10. Every time i go to Partition Manager it starts connecting to my phone and sits for about a minute then it come back with an error saying "DownloadFail:Sahara Fail:QSharaServerFailProcess fail".

Its on Flat build
Its has the right programmer path set to the firehose file
and it is set to ufs storage type

Any suggestions?

Hello, I had this problem and found a QFIL forum stating this is a problem to do with the driver. After trying to just reboot with driver sig off on windows 10 and it still didn't work I searched for a new driver and uninstalled the Qualcomm modem driver that was previously installed. It worked just fine and I finished the entire rooting process with the driver from here. I also backed up most of the files I gathered from all the sites along the way but only the driver and the magisk manager is added to my public folder.
This is my Onedrive public folder you should be able to download by checking to left side of the file then download will appear above on the left, I just logged out and checked it myself.

[edit]
I just searched my history and found the page that also has the 32 bit driver! So many drivers too many pages!

[Edit]
Here's another link, if you need files follow guides that incur similar processes. LGMobileDriver_WHQL_Ver_4.4.2.exe Windows

Recovery Firmwares

Anyone know where to find more pages like this one please msg me links:
 
Last edited:

justanutt

Senior Member
Apr 10, 2013
81
21
I need help with my Verizon lg g8. I am on 20a. I tried to unlock the bootloader and somehow got my phone hosed. I can get to download mode, and even flash in lgup. The problem is after the flash, lgup says it's complete but does not change the system to 20i. It stays at 20a and hangs at logo screen. It will not boot completely. Any help would be appreciated. 👍

Also, when I reboot it does the circle erasing data thing and then goes to the boot logo screen.
 

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Faylynx

Member
Apr 10, 2020
26
7
It is possible to backup your phone and someone with a rooted phone should be able to create files for someone else to download but you would have to find them that tutorial, I think there was one for the g8 but things like these are ordinarily universal if you use the terminal on the phone to identify partitions and then modify the instructions for your device. I find many guides in different phone root/unlock guides that will work on any phone and would probably help if there was a forum for all the universal stuff and how to get your devices information which usually involves installing terminal and running cat proc etc. linux stuff
 

Faylynx

Member
Apr 10, 2020
26
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justanutt

Senior Member
Apr 10, 2013
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Top Liked Posts

  • 1
    Does anyone know of a root explorer that works with LG phones, allows read/write not just read
    Yeah, "Root Explorer"
  • 1
    Does anyone know of a root explorer that works with LG phones, allows read/write not just read
    Yeah, "Root Explorer"
  • 30
    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.
    3
    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.
    2
    It should since the abl used is from a g8x and it worked on my v50 sprint.. :)
    2
    My experience was Nothing like yours. I had a stock v50. In the thread I linked they did discuss the touch functionality in twrp. I launch recovery from vol - and power buttons and touch control was fine. The only thing worthy of comment from my point of view was, after twrp install I had to re-root through magisk manager and QFIL.
    Touch in TWRP only work when booting using the button combo :)
    2
    thanks for reply
    my devices: lg g8 sprint g820u21d
    i think i solved it, just restore the abl_a and abl_b but my device doesnt have root. i follow magisk root step , try many time but no luck.

    edit: Finally i dit it !!

    Yeah who would have thought it was important to follow all the steps...
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