Install LineageOS on h870

Basic requirements

  1. Make sure your computer has working adb and fastboot. Setup instructions can be found here.
  2. Enable USB debugging on your device.

Unlocking the bootloader

  1. Visit LG’s official unlocking website, where you’ll be asked to login.
  2. Follow the instructions and get your unlock file.
  3. Connect your device to your PC via USB.
  4. On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
    adb reboot bootloader
    

    You can also boot into fastboot mode via a key combination:

    • With the device powered off, hold Volume Up + Power.
  5. Once the device is in fastboot mode, verify your PC finds it by typing:
    fastboot devices
    
  6. Now type the following command to unlock the bootloader:
    fastboot flash unlock unlock.bin
    

    Where unlock.bin is the bootloader unlock file you received in the email.

  7. Wait for the bootloader unlocking process to complete. Once finished, you can check if bootloader is successfully unlocked by typing:
    fastboot getvar unlocked
    

    Verify that the response is unlocked: yes. In that case, you can now install third-party firmware.

  8. Since the device resets completely, you will need to re-enable USB debugging to continue.

Installing a custom recovery using fastboot

  1. Download a custom recovery - you can download TWRP. Simply download the latest recovery file, named something like twrp-x.x.x-x-h870.img.

  2. Connect your device to your PC via USB.
  3. On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
    adb reboot bootloader
    

    You can also boot into fastboot mode via a key combination:

    • With the device powered off, hold Volume Up + Power.
  4. Once the device is in fastboot mode, verify your PC finds it by typing:
    fastboot devices
    
  5. Flash recovery onto your device:
    fastboot flash recovery twrp-x.x.x-x-h870.img
    
  6. Now reboot into recovery to verify the installation:
    • With the device powered off, hold Volume Down + Power until the LG logo appears, then release Power for a second and hold it again until the recovery comes up.

     
    Alternatively, you can use fastboot to boot directly into the freshly flashed or any other desired recovery:

    fastboot boot twrp-x.x.x-x-h870.img
    

Installing LineageOS from recovery

  1. Build a LineageOS install package.

    • Optionally, download additional application packages such as Google Apps (use the arm64 architecture).
  2. If you aren’t already in recovery, reboot into recovery:
    • With the device powered off, hold Volume Down + Power until the LG logo appears, then release Power for a second and hold it again until the recovery comes up.
  3. Go back to return to main menu, then tap Wipe.
  4. Now tap Format Data and continue with the formatting process. This will remove encryption as well as delete all files stored on the internal storage.
  5. Return to the previous menu and tap Advanced Wipe.

  6. Select the Cache and System partitions to be wiped and then Swipe to Wipe.

  7. Sideload the LineageOS .zip package:
    • On the device, select “Advanced”, “ADB Sideload”, then swipe to begin sideload.
    • On the host machine, sideload the package using: adb sideload filename.zip
  8. (Optionally): If you want to install any additional add-ons, adb sideload /path/to/zip those packages in sequence.

  9. (Optional): Root the device by installing the LineageOS’s AddonSU, (use the arm64 package) or using any other method you prefer.
  10. Once all installations are finished, run ‘adb reboot’.

Get assistance

If you have any questions or get stuck on any of the steps, feel free to ask on our subreddit or in #LineageOS on freenode.