Using Facetime outside UAE in UAE version iphones
If I buy an iphone 12 from Abu dhabi and use it in Bangladesh, can I use facetime in it?
FaceTime has to be supported by the provider:
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FaceTime isn't available in the United Arab Emirates.
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FaceTime may be unavailable if your device originates from this country or region and becomes unlocked or is used in another country or region.
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copied from: Wireless carrier support and features for iPhone in the Middle East and India - Apple Support