FaceTime icon disappears from settings with some sim cards although the phone is factory unlocked
I have iPhone 4s factory unlocked.
I bought it from Egypt, when I put Vodafone sim card, FaceTime works normally.
Currently I am in Indonesia. When I put any Indonesian sim card, FaceTime disappears from settings, restrictions, and everywhere.
When I put my Vodafone sim card just to test, FaceTime appear again.
Mobile phones providers and authorized apple dealers were not able to figure out the cause of this problem.
I hope anyone can help.
iPhone 4S, iOS 5.1