Has anyone had a problem with a portion of their screen becoming unresponsive? The top 1/4 of my screen has seemed to give out. On top of that, my phone doesn't rotate (landscape) when I turn the phone while in my homescreen, but if I'm in a program (gmail, facebook) the screen rotates. Anyone have any ideas or advice?? Thanks!!! PS I did a factory reset and that didn't help. The problem just occur within the last week or so.