My pinephone has a very limited functionality.
I made updates when i booted the first time. Now i tried stable (2020-07-04), rc and dev.
No cellular network (can not connect), no mobile data, no gps, no camera (should be normal).
I checked the hardware buttons and turned them off and on again.
The cellular network tries to connect but then is rejected.
The gps does nothing.
In the apps permissions i have no entries for camera, location and microphone, which is not normal. By installing unav and puremaps i was not asked to give permissions.

What does the reset button on the back?
Is there a way to fully reflash the phone?