Change telephone number in iMessage
My partner bought an iPhone in Friday asked for her old number to be transferred over to her new sim. She had to wait until today for that to happen so started using the ewes number while she waited.
She reqistered with iTunes etc. Now her number has changed iMessage does not recognise her number as an iphone. When she sends me a message it comes through as an iMessage but from her number that has been cancelled. When I send her a message it sends as a standard text message. The phone number listed in her settings is greyed out, how can it be changed?
Thanks.
iPhone 4, iOS 5