When unlocking an apple iphone there is no need for a "unlock Code". The process is done via iTunes once you receive the confirmation of unlock E-mail from us.
Install the last version of iTunes and make sure your iPhone is updated with the lastest version of Firmware (Currently iOS8).
Insert a non-accepted SIM card into your iPhone and switch it on.
Connect your iPhone to your computer using the Original USB Cable and Launch iTunes wait until iTunes detect your iPhone.
Disconnect your iPhone and reconnect it after 10 seconds. Your iPhone is now Unlocked !.