Hi everyone, I am in need of emergency help here. I've been trying to solve this for about 6 hours now, I've spoken to tmobile, AND samsung and they couldn't give me a solution and I have searched probably the whole Internet. Okay so I had just gotten my s3 about two to three weeks ago, everything worked fine until about few hours ago I went to a classroom that has no service I tried using my phone unaware hat there was no service and it failed, so I put it away until class was over, afterwards I tried calling texting and using my data and none works I get the error no network connection. I tried restarting phone, factory hard reset, setting the mobile network manually, changing battery, taking SIM card out and none of it has worked, does anyone have any idea how to fix this? I know my SIM card is fine because I used it on my friends phone and I had service fine. Ay help is much appreciated thanks..