There are currently no carriers in UAE supporting LTE on the iPhone. http://support.apple.com/kb/HT1937
Be careful if you are buying a phone from the US with the intent of using it in the Middle East.
The A1429 is not available as an unlocked phone in the US and may not support the 3G frequencies used by some carriers there.
You would be smarter to purchase a phone from an authorized source in your own country.