I have a strange problem with prox sensor during calls. The actual sensor works fine, it shuts down the display but still registers touches from the keypad. I've had numerous times when the person complains that I'm pressing dial tones and when I take my phone of my ear, the display wakes up and there's all kinds of numbers and symbols on the dialing screen. If I hold my phone on an angle off my cheek, the problem doesn't occur. Anyone else?