List of free, open source smartphone operating systems
Updated: August 29, 2025
I hope to experiment with these, post some experiences, and move away from closed-source big vendor smartphone operating systems. The most interesting device might be a Fairphone running Ubuntu Touch. Also considering an old cheap Pixel phone running Ubuntu Touch or postmarketOS for experimentation before moving to a more expensive daily driver.
- postmarketOS — based on Alpine Linux
- Ubuntu Touch — based on Ubuntu
- Mobian — based on Debian
- PureOS — from Purism
- LineageOS — based on Android
- GrapheneOS — based on Android
Devices
This is an incomplete list of devices commonly supported by above mobile operating systems. There are many more but these seem to be more recent.
- Fairphone 4
- Fairphone 5
- Google Pixel 3a
- OnePlus 6
- OnePlus 6T