i buy iphone 5 factory unlock .i check no unlock carri att .apple store hep unlock

This is a user support forum, it's not monitored by apple. And I can't imagine posting your IMEI on the public internet is a smart idea. I'm not even sure what you're asking, but you should delete this post and contact apple directly.

http://www.apple.com/uk/support/contact/

If it's locked to AT&T, then you did NOT buy an unlocked phone. ONLY the carrier it is locked to can authorize unlocking it. If it's locked to AT&T, contact them.