CustomDroid
Fairphone

Fairphone 4

Qualcomm SM7225 Snapdragon 750Greleased Oct 2021up to android 16latest android is 17
ro.product.deviceFP4

also sold as Fairphone4 · FP4

Fairphone 4
photo: LineageOS Wiki
Actively maintained

Released Oct 2021, newest ROM build 5 days ago (5 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.

Hardware

SoC
Qualcomm SM7225 Snapdragon 750G
CPU
Kryo 570
GPU
Qualcomm Adreno 619
Architecture
arm64
RAM
6/8 GB LPDDR4X
Storage
128/256 GB UFS 2.1
Screen
6.3" · 2340x1080 · IPS LCD
Battery
3905 mAh (removable)
Network
2G GSM · 3G UMTS · 4G LTE · 5G NR
Released
Oct 2021

Sensors & features

  • Accelerometer
  • Compass
  • DP over USB-C
  • Dual SIM
  • eSIM
  • Fingerprint reader
  • BeiDou
  • Galileo
  • GLONASS
  • GPS
  • Gyroscope
  • Light sensor
  • NFC
  • Proximity sensor
  • RGB ambient light
  • USB OTG

Specs from the LineageOS wiki (CC BY-SA 3.0).

ROMs · 09

The Fairphone 4 (codename FP4) has 9 tracked custom ROMs on CustomDroid — including Sailfish OS, postmarketOS, Ubuntu Touch and 6 more, running up to Android 16. Each listing links to the project's own download and install guide, and was last checked against the projects' catalogues on 21 Sept 2026.

Fairphone plans security updates for this model until Sept 2028. endoflife.date · what end-of-life means

Tick “compare” on two or three builds to see them side by side.

Show
Android

Linux mobile operating systems — not Android; Android apps don't run natively

RSS feed — subscribe to get new Fairphone 4 builds in your reader · JSON

Before you flash

Flashing generally means unlocking the bootloader, booting a custom recovery, wiping, then installing the ROM. Exact steps differ per device and ROM, so follow the Install guide for the one you pick, and back up first. Check what can break (banking apps, DRM, carrier features) and how to get back to stock before you start. Why flash a custom ROM · All guides

Custom recovery for this device: TWRP. Flash the one your chosen ROM's guide asks for — common recovery errors.

This is a Qualcomm device, so on Windows you'll want the Google USB Driver (and QDLoader 9008 to unbrick) before your computer will see it in fastboot. Which USB drivers you need.

LineageOS publishes a step-by-step install guide for this device: wiki.lineageos.org/devices/FP4

Timeline

  1. Jul 2026
    LineageOS, /e/OS first tracked
  2. Sept 2026
    Ubuntu Touch, CalyxOS, postmarketOS, iodéOS, Sailfish OS, LMODroid, LineageOS for microG first tracked

Dates show when CustomDroid first indexed each ROM for this device, not when support originally launched.

ROM availability and links come from each project. CustomDroid indexes builds, it doesn't mirror them — always download from the official project, verify the file's hash/signature, confirm it matches your exact codename, and back up before flashing.