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Windows 11 running on mh2lm

Running Windows on the LG G8x

Partitioning your device

Prerequisites

Notes

Warning

Do not run all commands at once, execute them in order!

YOU CAN BREAK YOUR DEVICE WITH THE COMMANDS BELOW IF YOU DO THEM WRONG!!!

DO NOT REBOOT YOUR PHONE! If you think you made a mistake, ask for help in the Telegram chat.

Opening CMD as an admin

Download platform-tools and extract the folder somewhere, then open CMD as an administrator.

It is recommended to keep this window open and use it throughout the entire guide.

Replace path\to\platform-tools with the actual path to the platform-tools folder, for example C:\platform-tools.

cd path\to\platform-tools

Backing up partitions

If you don't do this and mess something up, you're on your own

Setting up Qfil

  • Open Qfil.
  • In "Select Build Type", select flat build.
  • In "Select programmer", select the downloaded firehose.
  • In "Configuration", make sure the "Device Type" is set to UFS.

Boot to EDL

  • Open Device Manager on your PC
  • With the phone turned off, hold volume down + power.
  • After the LG logo appears, while still holding volume down + power, start rapidly pressing the volume up button.
  • Keep doing this until you hear a USB connection sound on your PC, or when Qualcomm HS-USB QDLoader 9008 appears in the Ports (COM & LPT) category of Device Manager.
  • If the device is called QUSB_BULK_CID or has a ⚠️ yellow warning triangle / question mark, and is located in any other category (for example Other devices), you need to install EDL drivers first.
  • To install EDL drivers, extract the contents of QUD.zip somewhere, right click on QUSB_BULK_CID, click on Update driver and Browse my computer for drivers, then find and select the QUD folder.

Making sure Qfil works

  • In Qfil, make sure the correct port is selected. If it says No Port Available, select the Qualcomm HS-USB QDLoader 9008 port.
  • At the top, select "Tools" > "Partition manager", and click Ok.
  • If you see a Download Fail:Sahara Fail error, make sure your cable stays connected and reboot to EDL again by holding volume down + power, then start rapidly pressing the volume up button once the LG logo appears.
  • Once you're back in EDL, try opening the Partition manager again.
  • If it still fails, try to repeat the last step a few times. You can also try rebooting your phone and PC.

Backing up your partitions

  • In the Partition manager, right click on abl_a > Manage Partition Data and press Read Data.
  • Do the same thing for fsg, fsc, modemst1, modemst2 and modem_a
  • If you want to be on the safe side, you can also use QFILHelper to additionally back up every partition. In this guide we only back up the most critical partitions.

Important

Navigate to C:\Users\YOURNAME\AppData\Roaming\Qualcomm\QFIL\COMPORT_#\ and rename the backed up partitions one by one as you back them up. Qfil does not name the backups, and if you don't rename them, it'll be impossible to figure out which files are which. You can restore them later with the Load Image function.

Flashing engineering ABL

If fastboot works on your phone, you can skip this step

  • In Qfil, select Tools > Partition manager, and click Ok.
  • Right click on abl_a > Manage Partition Data and press Load Image.
  • Select and flash the engabl_ab.bin file.
  • Do the same thing for abl_b.

Reboot to fastboot mode

  • Reboot your phone by holding volume down + power until it shows the LG logo, then release the buttons.
  • After it has booted, unplug the cable and power it off.
  • Once the device has turned off, hold the volume down button, then plug the cable back in.
  • If the phone in device manager is called Android and has a ⚠️ yellow warning triangle, you need to install fastboot drivers before you can continue.
  • To install fastboot drivers, extract the contents of QUD.zip somewhere, right click on Android, click on Update driver and Browse my computer for drivers, then find and select the QUD folder.

Boot into the modded TWRP

Replace path\to\modded-twrp-g8x.img with the actual path of the provided TWRP image

After booting into TWRP, leave the device on the main screen. You can press the power button to turn the display off, if you want

fastboot boot path\to\modded-twrp-g8x.img

Backing up your boot image

This will back up your current boot image in the current directory

adb pull /dev/block/by-name/boot_a boot.img

Preparing for partitioning

adb shell parted /dev/block/sda

Printing the current partition table

This will print a list of partitions on your phone

print

Removing userdata

Replace $ with the number of the userdata partition, which should be 30

If you have a grow partition, remove it as well

rm $

Recreating userdata

Replace 17.7GB with the former start value of userdata which we just deleted

Replace 60GB with the end value you want userdata to have. In this example Android will have 60GB-17.7GB = 42.3GB of usable storage space.

mkpart userdata ext4 17.7GB 60GB

Creating ESP partition

Replace 60GB with the end value of userdata

Replace 60.3GB with the value you used before, adding 0.3GB to it

mkpart esp fat32 60GB 60.3GB

Creating Windows partition

Replace 60.3GB with the end value of esp

Replace 126GB with the end value of your disk, use p free to find it

mkpart win ntfs 60.3GB 126GB

Making ESP bootable

Use print to see all partitions. Replace "$" with your ESP partition number, which should be 31

set $ esp on

Exit parted

quit

Format all data

  • Go to the Wipe menu in your recovery and wipe all data. If this doesn't work, simply reboot your phone.

Reboot your phone

Once it is booted, it might tell you decryption was unsuccesful and it will ask you to erase all data.

  • Press this button to erase all data, then set up your phone (make sure to also enable USB debugging in developer settings), then reboot back into TWRP.

Formatting win and esp partitions

After rebooting back into TWRP

adb shell mkfs.ntfs -f /dev/block/by-name/win -L WINMH2LM
adb shell mkfs.fat -F32 -s1 /dev/block/by-name/esp -n ESPMH2LM

Reboot your phone

In preparation for the next step

Next step: Rooting your phone