I've had my S3 for about a year and a half now and love it so very much, but recently the power button has been acting up. It will randomly not work, if you brush that side of the phone, the power menu comes up and it won't go into sleep mode anymore with it. I've put it down and found the battery drained because it keeps the home screen on or turns it on randomly and it won't go back to sleep. I turned if off and it was hard to even get it to boot up again. I'm getting incredibly frustrated. I can't upgrade until December and I don't know what to do. I've tried blowing into the button to see if there's something in there, changed phone cases, nothing's working.