Fairfone 3: Which Android version?

/e/OS Devices Fairphone
16

Hello @ajko17, Welcome to this forum.

It is e-0.9-p (android 9Pie based) !
so you missed a10Q, a11R, a12S, a13T, (current Community builds are on a14U)

i can’t remember about upgrading from P to Q,
But upgrading from Q to higher version imply an encryption incompatibility that lead to the necessity of formating the /data partition.

Take a Back-up of your important things before

or