Flash LineageOS 20 to my Fairphone 4

• Flash LineageOS 20 to my Fairphone 4
  • TL;DR
  • Preparation
  • Walkthrough
    • Unlock the bootloader
    • Flashing recovery
    • Flashing ROM
    • Rooting
    • The end

TL;DR

A short and fast note.

• Official Lineage Recovery
• Official Lineage 20
• NikGapps
• Magisk

Preparation

• Recovery
  • An recovery image made by LineageOS (Nightly)
    • LineageOS 20 (Nightly)
      • 2023 Oct 01
• ROM
  • LineageOS
    • LineageOS 20 (Nightly)
      • 2023 Oct 01
• Rooting
  • Magisk
    • Magisk v26.3
      • 2023 Sep 04

Walkthrough

Overall, it was a very simple flash experience.

Unlock the bootloader

Same as Sony's devices, Fairphone required us to applied a "unlock code" before we unlock the bootloader.

https://support.fairphone.com/hc/en-us/articles/10492476238865

1. Find the IMEI 1.
2. Find the device's serial number.
3. Go to the official Fairphone website
4. key-in the info you got.
5. Get the unlock code
6. tap "OEM unlocking" in "Developer options"
7. Key-in unlock code
8. reboot to fastboot mode
9. coonnect to PC via USB
10. key-in the commend fastboot flashing unlock from PC

Flashing recovery

Same as usual, after unlocked the bootloader, the next thing needs to do is flash a custom recovery, so that I may process to flash custom ROM.

Boot into fastboot mode, use adb to sideload the LineageOS' recovery.

Once it's finished, boot into LineageOS' recovery and progress to the next section.

Flashing ROM

In LineageOS' official recovery, change the selection by pressing the volumn buttom.

Select "Install upgrade", then use adb to flash the LineageOS 20.

Rooting

Once we boot into the system, we install Magisk's apk first, and just let it root the ROM. After 1 or 2 times reboot, simply done.

The end

Not really a difficult experience like flashing custom ROM into Samsung device. That's all.

– 2023 Oct 8, finished flashing.