Fairfone 3: Which Android version?

[AnotherElk]

@piero

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.

No, this was exactly the case with the upgrade from Android 9 (P or Pie) to Android 10 (Q) or Android 11 (R).

@Manoj

The FP3 OTA OS update from Pie to Q/R is not possible as encryption method changed on FP3 between Pie and Q/R. It is not possible to change the method while updating. The team spent a great deal of time on this, but has not been able to resolve this problem. For now, the manual process is the only way to upgrade the FP3 from pie to other OS versions.