My iphone 4 won't activate facetime. At first I didn't have the button, when in a call so I searched settings and found that it wasn't turned on.. I turned on facetime and it says "Unsuccessful, please turn facetime on to try again" But when I turn it off and back on nothing happens.. This is a 16gb 4, that was restored from a 3g backup after activation. Anyone else having this issue, or found a work around for this issue?