Okay, so my phone's like 5-6 months old and i have At&t. I was texting my friend and suddenly the text wouldn't go through, so I thought it was the usual so I restarted it. But it still wouldn't go through and after restarting a few more times i tried making a call. When I did that I got a "Emergency Calls Only" popup. I took out the battery and sim card and tried to send a text. I was able to send two before I got stuck at the "Message Sending " screen. So now I can't make calls or send texts. It seems like its only my phone since the other phones in our plan are not affected. Anyone have an idea to fix this problem? Is this problem on At&t's side? I plan to call At&t in the morning if this problem isn't resolved by then but, any idea what I should ask about?

Thanks!