Why is my phone number greyed out in iMessage?
Recently, iMessage went down for the day and i turned it off. A few days later i turned it back and and everything seemed to be working fine until a friend asked my why he was recieving iMessages fom my Email. My imessage account says that is recieving at 2 addresses, my phone number and my email. My phone number is greyed out and no amount of resets or turning imessage off and on can change it back. I assume this has something to do with my friend having iOS6 and me having 5.1.1 or whatever the one before 6 was.
Are there any cofirmed solutions or should i simply take it to an Apple Store and see if they can fix it?
iPhone 4 (8GB), iOS 5.1.1