From postmarketOS Wiki

Debian & OpenBSD contributor hacking on free and open mobile devices.

Feel free to contact me if you need to test your code on any of the devices I own.

Device Notes
Google Nexus 7 2012 (asus-grouper) bad battery
Google Nexus 7 2013 (asus-flo) not booting or charging
Nokia N900 (nokia-n900) good battery life
PINE64 PinePhone (pine64-pinephone) general test subject
PINE64 PinePhone Pro (pine64-pinephonepro) mobian dev platform
Raspberry Pi 4 (raspberry-pi4) aarch64 testbed
Samsung Galaxy Note 3 (samsung-hlte) running lineage os
Samsung Galaxy Note 4 (samsung-treltexx)
Samsung Galaxy S5 (samsung-klte) new battery
Sony Xperia U (sony-kumquat)
Xiaomi Mi 3 (xiaomi-cancro) bad battery