Alternative phones than mainstream

It's more like a quirk than anything else
- Using alternative platform might just make your life harder, a lot of time cost more, however it's a good learning process
Source : https://itsfoss.com/open-source-alternatives-android/
- https://www.tizen.org/ , Linux based, not fully tested ( security issue )
- http://plasma-phone.org/, Linux KDE
- https://postmarketos.org/, Linux based, not much info
- https://www.pureos.net/, Linux based, seems more tested has PC version too
- https://ubports.com/, Ubuntu linux based, has its own hardware
- https://pivotce.com/tag/luneos/, WebOS successor
  - Remark: having used WebOS, the backthen web based top layer on kernal is very ahead of its time, that's probably why it failed
  - The hardware/software wasn't ready making the device taking too long to boot, however now you can see a lot of OS running its interface on browser like chromeOS
- https://lineageos.org/, Android derivative
Hardware: https://hackaday.io/project/42944-kite-open-hardware-android-smartphone
- Kite: https://www.kiteboard.io/
  - A very interesting project as it focus on hardware , and not like common testbeds, it has most phone's function including cellular
  - Could be very good testbed for some android based design project