Install LineageOS on natrium

Basic requirements

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

Unlocking the bootloader

  1. Visit Xiaomi’s official unlocking website and apply for unlocking permissions.
  2. Wait until you get the approval, which may take some days.
  3. At the same time, link the device to your Mi account in Settings > Additional settings > Developer options > Mi Unlock status. This step is mandatory and will trigger a countdown of 360 hours, the waiting period before a device can be unlocked.
  4. Once you get the approval, visit the website again and you will be redirected to the Mi Unlock app download page.
  5. Download the Mi Unlock app (Windows is required to run the app).
  6. Once the 360 hours waiting period is over, run the Mi Unlock app and follow the instructions provided by the app.
  7. After device and Mi account are successfully verified, the bootloader should be unlocked.
  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-natrium.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 Down + Power. Keep holding both buttons until the word “FASTBOOT” appears on the screen, then release.
  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 <recovery_filename>.img
    
  6. Now reboot into recovery to verify the installation:
    • With the device powered off, hold Volume Up + Power. Keep holding both buttons until the “MI” logo appears on the screen, then release.

    Alternatively, on some devices and recoveries you can use fastboot to boot directly into the freshly flashed or any other desired recovery:

    fastboot boot <recovery_filename>.img
    

Installing LineageOS from recovery

  1. Download the LineageOS installation package that you would like to install or build the package yourself.

    • Optionally, download additional application packages such as Google Apps (use the arm64 architecture).
  2. If you are not in recovery, reboot into recovery:
    • With the device powered off, hold Volume Up + Power. Keep holding both buttons until the “MI” logo appears on the screen, then release.
  3. Now tap Wipe.
  4. Now tap Format Data and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage.

  5. Return to the previous menu and tap Advanced Wipe, then select the Cache and System partitions and then Swipe to Wipe.

  6. 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
  7. (Optionally): If you want to install any additional add-ons, adb sideload filename.zip those packages in sequence.

  8. (Optional): Root your device by installing LineageOS’ AddonSU, (use the arm64 package) or by using any other method you prefer.
  9. Once you have installed everything successfully, 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.