If you're owning a Locked HTC Phone, I think you already understanded. When you try to insert a non-accepted SIM card to your HTC Phone, it will ask for "SIM Network Unlock PIN"
So what we do is helping you to find your HTC Unlock Code from HTC Factory Database! We're the direct source for this service so our system works automatically to find your Unlock Code as fast as possible and then send you the Unlock Code immediately to your email!
Unlike other providers who are just able to unlock some models of HTC, here we support all HTC phones. You don't have to select your phone model, just provide us IMEI number, that's enough.