Hey there, having made some calls with my fairphone2 now, I observed that something is wrong with the approximation detection (or something similar).
Whenever I make a call with the FP2 on my ear, the screen switches off when holding the phone next to my cheek. So far, so good.
However, within a period of ca. 30 seconds, the screen lights up and the same moment, the phone recognizes all touches of my cheek. This sometimes makes the phone hang up, just dial some random numbers, or do other weird stuff (like muting the call or switching to speakerphones which is particularly funny having the thing right next to my ear )
The only solution is to move the phone away and slowly moving it bact to my ear, to switch the screen off again. However, sooner or later, the problem reappears. This happens very often and during some calls almost constantly.
How can I fix this? Is there a sensitivity value somewhere or is something broken? The phone is not really useable like this and after all, I want to use my phone for making calls mainly.