i can not operate lte in me new iphone 5 ,and i try it with all sim card that saudi has.
You are not talking to Apple. Apple does not provide support via email.
Per this article: http://support.apple.com/kb/HT1937?viewlocale=en_US&locale=en_US
There are no supported carriers in KSA that provide LTE support for the iPhone at this time.
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