8.1 update problems: iMessage
after updating to the 8.1 yesterday morning my iMessage has not been working correctly. first my messages said undelivered until I turned Imessage off. Then I tried to turn them on again and they will only send from my email. When I uncheck my email address and just have my number the same thing happens where they won't deliver at all. Please help.
iPhone 5s, iOS 8.1