We upgraded the camera on the FP2 we have. Now the images are almost never in focus and are worse than with the old camera. Also even after recalibrating the proximity sensor several times we get issues during phone calls that the phone just hangs up.
Any idea how to improve the situation?
Did you remove all the foils the new modules might have come with?
Try Open Camera. A lot of camera issues are with the G%§$e Camera app.
Try cleaning the screen - also from the inside:
If after recalibrating again it still doesn’t work test with e.g. SatStat if the sensor works at all - if not contact support to get it replaced.