Imessage won't work/activate after 5.1
I updated to 5.1 this morning, and now my imessage won't work. I try to turn it on, and I just get an activation error. "An error occurred during activation, try again".I've read in some other posts that my phone number should show by the imessage option? I don't see it anywhere. Once I get the activation error, then it provides me with the option to sign in using my appleID, but it when I do, it just keeps on reverting back to the sign in screen and won't connect. I've read through this forum and tried everything that I found - checked the date/time settings, checked my phone number, reset the networks, hard reset - and still it won't activate. What do I do?
iPhone 4S, iOS 5.1