I have the HTC Incredible. Sometimes when I want to hang up a call I can't get my screen to wake. Does it really sleep in the middle of a call? I feel like I should just be able to touch it and it should give me the hang up option. Sometimes it responds nicely by lighting back up when I tilt the phone away from my ear and then I can press the hang up button, but other times I have the problem that I just described... Any help?