Fairphone 3 unstable mobile data

[Lidwien]

It has nothing to do with the mobile data.
Have a read about no fingerprint

@Ingo

To my knowledge this is due to hightened security requirements by Google in Android 13 wrt. 11 which means the fingerprint hardware in the FP3 is no longer seen as “secure enough” by Google for the highest level of access to certain Android APIs including unlocking the Android keystore.
As Fairphone has to pass Google certification there is no way to “cheat” around this. Maybe custom ROMs can.