Why am I having trouble signing into iMessaging?
Why am I having trouble signing into iMessaging?
iPad, iOS 5.1
Take a look at this and you might find an answer here.
If you get an error when trying to activate iMessage or FaceTime - Apple Support
Without some more information from you, we can not possibly know what the problem could be. Why don't you explain what is happening when you try to sign in or activate iMessages if the support article doesn't help?