Sometimes (Edit: almost all the time!!) the screen lock during telephone call does not turn off. I then have to remove the back cover and remove the battery in order to reboot the Fairphone 2. All other keys are dead. Is this a software problem or a hardware problem (e.g. the proximity sensor)?
Edit: it appears as if this problem only happens when the call is not answered…
Another Edit: After some tests I’m just pretty sure that the settings for the proximity sensor are way too sensitive. I think there is just some dust blocking the sensor (on the upper left of the display) and that is enough to turn the screen off…
