I was just on a 611 call to AT&T. When I'm given an audible option (for instance press one to continue) I can't press the number on the keypad because every time I try to press the digit the screen goes black. I've noticed this once before. I was just given option for keys 1 through 5 in the message and only 5 seemed to work. What the heck is going on here? No problem dialing numbers etc... Anyone know what this is all about? Thanks.