partial bootloader-unlock-custom-rom phone Fairphone fp4 4, Fairphone 4 4Fairphone 4
Difficulty
Moderate
Brick risk
Medium
Legal risk
Low
Not stock root. Needs an unlocked bootloader and a custom ROM.
How-to
Notes
Some TWRP and postmarketOS builds for this device are based on LineageOS device trees.
pmOS uses independent kernel (mainline or sm6350-mainline).
Install with fastboot.
CalyxOS lists FP4 with security updates until Dec 2026.
SourcesLast verified Oct 31, 2026
- https://wiki.lineageos.org/devices/FP4/ wiki.lineageos.org
- https://gitlab.com/postmarketOS/pmaports/-/tree/master/device/community/device-fairphone-fp4 gitlab.com
- https://calyxos.org/install/devices/FP4/ calyxos.org
