[Q] Can not end calls

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Every time I place a call it connects, but if the screen turns off it will not turn back on. I have to battery pull to end a call or the other person has to hang up. not terrible if all my calls get picked up but if it goes to voicemail there is no way to stop it. I started having this problem about a month ago, did not exist before. I originally was using cleanrom and used power button to end calls to get around this but am now on CM10 and having the same issue. I don't have the power button option this time. I haven't been able to find anyone with a similar problem and I'm not sure how to troubleshoot this one. any ideas?

Disregard this question. I found that it was the type of screen protector I was using. I thought it might have to do with the sensor, as the problem persisted through different ROMs so I cleaned the screen and replaced the protector, still had problems. However, after removing it completely and trying again bare screen, I found that everything worked fine.