Although the domain is called unlockiphone5instant.com, this is a website for unlocking iPhone of all models. You can always send your orders and after several hours, your iPhone is unlocked for good. Once you place your order, the server will then process the unlocking of your iPhone. Sometimes, it only takes 1-24 hours to complete the unlock process for AT&T devices. Although the unlocking time varies based on the network provider.
The persons behind this site are Todd and Shawn from Carleton Place, Ontario, Canada. But they have contact all over the world to serve a thousand more customers. In addition, if they fail to unlock your iPhone within the several hours mentioned, you are secured by a money back guarantee. To know if your device is completely unlocked, all you have to do is restore your iPhone with your iTunes. Because the service is called FACTORY unlock, you will be rest assured that it will not void your warranty.