Droid Incredible 4G: Screen won't light up during call when moved to view

[killroy321]

When your on a call, you flop the phone down and the screen goes from black, to lit up to view it or use the keyboard.
My old Incredible 4 GLTE worked but my warranty replacement one wont do it.
I cannot find an option for auto screen on or off during calls.
I have looked every where for this type of option and cant seem to figure it out.
I'm annoyed.
I'm sure one of you Guru's knows what I'm doing wrong.

 

[B. Diddy]

Welcome to Android Central! Do you have a screen protector on, or a bulky case that might be blocking the proximity sensor (which should be right near the front-facing camera)? Try taking those off. Also, make sure the glass in front of the proximity sensor is really clean.

 

[killroy321]

I have the same hard case on the back of the phone as I had on my last 4G LTE. I just transferred it when the replacement arrived.
I do not have a screen protector and the glass is clean.
Is there a setting in the phone or is this sensor defective?

 

[B. Diddy]

Not sure if there's a setting. On the Galaxy S4, you can turn the proximity sensor on and off in the Call Settings (which is part of the Dialer app), so check that out.