How do I stop my LG Optimus Zone's screen from locking up during a call?

[msgreenberet]

When I answer a call my screen locks up, it used to be that when I took it away from my head it automatically would light up and I could use the other functions, now it locks up and I can't even hang up the call. Is this a setting that I may have changed unknowingly?

[SuzyQ · Accepted solution]

The proximity sensor may have become dirty, or covered by a case, so that it no longer functions properly. Or it may simply have stopped working.

How old is the phone? Is there any physical damage?  It may be covered under manufacturer's warranty, if the sensor has failed.

[msgreenberet]

My niece stickered my phone and she got one over the censor, thank you I never would have known that's what it was.

[SuzyQ]

Glad you got it figured out, and glad that it was a simple fix!