The guys at iPhoneislam has come up with a tweak to deactivate the iPhone 4 Facetime block in the Middle East. All you have to do is to jailbreak your phone, then open Cydia and add this repo: From the repo, grab the FaceTime Hacktivator.

Use this Article to find links to wireless-carrier support and basic information about the services currently supported. Click the region in which you live to locate your carrier's information.

To install this application, you simply add the source in Cydia iPhoneIslam ( then select and download "FaceTime Hacktivator.

After that, the iPhone will perform Respring, and voila! FaceTime has been successfully activated on the device

Thank You IphoneISlam