I have a Nexus 4 (Android 5.1.1). My proximity sensor does not work well. I don't have any cover. The distance it detects is always 0 cm.
One solution I found is turn on "Power button ends call". However I need use my keyboard during the call.
I also tried some proximity sensor reset apps, but they do not work on my phone.
One solution I found is to keep the screen light on. But I don't have this setting on my phone.
Is there any other way to keep my screen light on during the call or other solutions? Thanks