Theunlockingcompany.com [cracked] -

Depending on the model and carrier, the company provides either an unlock code to be entered into the device or performs a remote unlock (common for iPhones and devices with specific unlock apps).

It makes perfect sense: a locked phone is only useful to people on that specific carrier. An unlocked phone is useful to anyone on any compatible network. By unlocking your device, you instantly broaden your market and boost the asking price when it’s time to sell. theunlockingcompany.com