So, I know there are a lot of touch screen unresponsive threads out there, but I haven't been able to find one where it works if you enter lock screen via power button and back out again. I've had my S3 for just over a year now, and this has happened a handful of times for me. Everytime when the screen becomes unresponsive out of the blue, I have been able to get it to work again if I lock my phone then unlock it (via touch screen) right after (and all the menu buttons work as well on the phone itself, it's just the screen). I was just wondering if anyone know what may be causing this please? Thanks.