I'm having trouble with phone freezing completely even including screen and buttons. Also have the screen automatically turning on from "sleep mode/lock mode". I had no problems with phone till I bought a case and started noticing these problems but since have taken case off and still have problems so not sure if case had anything to do with causing the problem. I didn't download any new apps or updates and hadn't done any apps in over a month before this started. Anyone else have this and any advice how to fix it? Also have problem when downloading something that its no where to be found, not even in the file I selected for it to go in. Plus receiving errors now when doing various things, any advice with that? Thank you.