I don't know if I have been hacked, have a virus or what. For about a month now my phone has been, scrolling screens on it's own, starting programs or apps, selecting things I am not trying to. When this starts, it locks me out, sometimes it will slow down and I can gain control, but most of the time the only buttons that work is for me if the power button. All other screen functions and buttons stop working. I have called AT&T and trouble shot with them and they don't really know. I do have over heating issues and I do have a small crack in the upper right corner of the screen that is under a 1/4 of an inch. The crack goes from just above the camera to the right corner. Because of this crack they say Samsung wont warranty it! I do have insurance and can get a replacement but I thought I should try something first! I have only had this phone for about 4 or 5 months. Any suggestions?