My wife is ready to throw her phone because it seems to hang up a lot during calls. I seen her just talking and the she is all "hello, hello" and gets mad. I know the screen turns off when on call as I cover the sensor to see. I'm not sure if for some reason the screen kicks on and her cheeck hangs it up but she loves the phone but hates this one detail. I told her to lock the phone on call but then its a pain to get the scree back on, I guess that's a glitch also.