I picked up an iPhone 5, and in doing so also transferred from o2 to T-Mobile in the UK, but my PAC code didn't go through until today to move my old mobile number. Now, iMessage is being silly. In the settings for iMessage I have two items listed for Send/Recieve, my phone number and email. Crucially, only the email address has a tick next to it, the phone number is greyed out and lacks a tick. I've tried to turn iMessage on and off multiple times, reset my network settings and nothing works. So, anybody know how I can get iMessage to enable itself with my phone number?