Why does my screen go off when answering or receiving calls?

[Windows Central Question]

why does my screen go off when answering or receiving calls

I have nokia lumas 730 and when I get calls I cannot see screen

 

[holymell]

Re: why does my screen go off when answering or receiving calls

I would imagine that is your proximity sensor... If it does that when it's closer to your head anyway. If it just goes black the moment someone calls, that's a defect.