problem sending iMessages on AT & T and ios 7, anyone else having the issue

Nope. No problems for my wife and I, or anyone else I know.

Yes. I am having the exact same problem. I have AT&T and an iPhone 5.

I have the same problem it recognizes some imessages and some it doesn't others it only started after I updated...

I have the 4s with Sprint and hubby and I are having the same issue......

Yes, I'm having this problem and with AT&T. Does anybody have a fix yet?

All 4 iPhone users on my account are having the same issue (3 iPhone 5's and 1 4s). We have turned off our iMessage for the time being. It all started after the ios 7.0.2 update. I hope it is fixed soon!

I am also having this issue. I have Verizon though. iPhone 5 with 7.0.2

I have Sprint and I have done the latest update that was supposed to fix this but I'm still having the same problem.

I am having issues sending messages also. I have a 4S updated to iOS 7.0.3 with AT&T service, and send messages to other family members who have iphone 4S, 5, and 5S. My messages will not send, even as text, until I restart my phone. Then they send normal for about an hour, then the messages get stuck "Sending...." and I have to restart the phone again. If I don't restart the phone, I get "Message failed to send" notification. Very annoying. I thought that iOS 7.0.3 was supposed to fix the messaging problems, but it looks like there are still issues.

I will note that I have not had this issue since the 7.0.3 upgrade. I was having the problem prior to the update and am no longer having the problem now.