BeMiGro
16
https://fairphone.zendesk.com/hc/en-us/articles/208661706-Screen-stays-black-after-a-call-problem-with-proximity-sensor-
Newer updates (since 1.6.2?) also contain a sensor calibration tool.
https://fairphone.zendesk.com/hc/en-us/articles/213161166-My-microphone-does-not-work-properly[quote=“cbi-ac, post:15, topic:22693”]
Hope this helps
BeMiGro