Android, Poland. It’s happening from the start (3 months now), but only a few days ago I realized why I have to re-enter my PIN every day – because it reboots.
The “Diagnose Issue” website of Fairphone Support told me to try enabling airplane mode. It’s been over 24 hours now with airplane mode and no reboots. However, it does not help that the webpage says “Glad to hear that your problem is solved!”. If I didn’t need network connectivity, I would stick to my old phone. So I will open a support case.