Screen autodim

[johniphone4]

I had the screen replaced on my 4 and now when I am on the phone the screen no longer turns off automatically, so now when ever I am on the phone I always end up turning on speaker phone or ending call. Anybody know how to fix this? Is there a setting somewhere?

 

[DaveM]

There's a proximity sensor that senses when your face is against the phone. It's not working. Maybe it was damaged when the screen got broken? Or the person who replaced the screen messed it up.