Solution: Please follow the official troubleshooting tool.
Besides a badly calibrated sensor the next most common reason for this issue is dust between the proximity sensor and the screen. For more info check this post.
- Clean the screen of your phone, especially the part where the proximity sensor is (See here).
- If that is not enough open up the phone and clean it from the inside.
- Remove the screen and blow onto the sensor and also wipe the sensor window in the screen assembly from the inside (I used a Q-tip for the window!).
- Check the functionality of the Proximity Sensor with an app like Sensor Readout.
These should not be necessary anymore. If you cleaned and recalibrated (you may have to do it more than once) your proximity sensor and that didn’t help you may want to contact support.
Use powerbutton to end call
Disable the sensor (found by @guillaume)
Disable the proximity sensor by putting a small piece of aluminium foil on it (picture). It makes the sensor feel that there is always light and the screen never turns off.
Then use the power button to switch the screen on and off.
Hi, I have my Fairphone 2 from Tuesday 5 January. I have a problem: when I make a call, the screen is totally black and it turns “on” only when the people on the other side close the call. When I receive the call, the screen is ok. The problem it’s only when I make the call. So annoying!