I've got an unusual problem on my wifes Galaxy S3. I can swipe the screen to unlock the phone, but the touchscreen then locks and is completely unresponsive so I cant use the phone at all. The notifications bar will swipe down and the menus are accessible and very responsive. It's almost as if the moment I swipe to open the phone, some form of screenlock kicks in, that prevents the main part of the screen from responding but not the notifications bar. I can't access the settings menu in the bottom left corner for the same reason, though it lights up, so it's responding to or sensing my finger. Any suggestions for getting in to the settings and resetting it somehow would be appreciated. Cheers.