So this has been a pretty persistent problem throughout all the ROMs I've installed. I'll receive or make a call, have my conversation, and then if I don't end the call manually by hitting the "end call" button, the phone freezes and looks like it's off. The only way to fix it is to either take out the battery and restart the phone, or wait a variable period of time for it to work again. This is a pretty big problem when the proximity sensor doesn't want to work all the time, so even when I take my phone away from my face, the screen still remains dark, and I can't hit the button. Can anyone help?