Missing FaceTime on iPhone4 (iOS 4.1)?

Question

iPhone

FaceTime disappeared without a trace from an iPhone. Even after a full reset it does not work. Although, the iPhone suspects this function and notifies each time when third-party programs access the address book.
Has anyone encountered a similar problem?
MTS operator, (I read somewhere on the forum that it depends on the operator)

Answer 1

Settings -> Phone -> FaceTime
Turn off, then turn back on.