Screen doesn't turn on again after a call

[AnotherElk]

Sounds like a job for the proximity sensor calibration tool …

https://forum.fairphone.com/t/proximity-sensor-tool-or-how-to-fix-the-proximity-sensor-issues/21411

Proximity sensor calibration tool

When my phone connects to a caller, the screen goes blank and insensitive. I’m told this is due to the proximity sensor needing to be calibrated, and that there is a tool to do this. Where do I find it, and how do I do it?