I have an iPod Touch 4G and my software is updated to iOS 6.1. I was messaging someone then suddenly it gave me an error saying the message was not sent and I had to re-try sending the message.
After that my iMessage freezes if I go into that same conversation. I cannot delete that conversation because if I go back (does not freeze if my screen is not in a conversation) and press edit then delete, it reappears every 5 seconds.
How can I troubleshoot iMessage on iOS?