My WIFI function has stopped working. I have a non-rooted phone, and everything is updated. When I select WIFI it says turning on, then turns green like it's on. The 3G signal stays the same and the WIFI indicator that is normally in the status bar is not there. I also know it's not working because it takes the normal 3G amount of time to load things like video...not super quick like with WIFI. Any thoughts on what's up with it? I've also had problems for the last week or so with my power/lock button not responding, as well as the screen doing nothing when I swipe it to unlock. Getting frustrated...