I have set up my iPad mini and it is working well with the exception of facetime. The ipad is to share between my wife and I and is the wifi only version. THe ipad has linked itself to my Apple phone number and I believe that this is causing the ipad to not be able to facetime to my apple phone. All other contacts I can face time. HOw do I delete my phone number from trhe ipad or put in a different number to allow my to call the iPhone from the ipad.