My phone only works, as it should for about 2 hours a day. The rest of the time it freezes on a black screen. Popping the battery out does nothing. When I restart it the screen remains black. (It is like its stuck in sleep mode) Deleted tons of apps, pics, etc. The lights still light up, still makes sounds ( I can get calls but can't answer them).....but cannot get it off that black screen. I'm scared to do a factory restart because I'm afraid it will freeze midway. Any suggestions? Aside from buying a new one....that's not an option at the moment.