I work in a cell phone refurbish/repair shop. Lately I’ve had a lot of customers come in asking me how to unlock an iphone 4. I always respond to them the process I do in order to unlock their iPhone. Every customer I’ve spoken with has chosen to do it themselves once they learn how simple and easy it is to do. I believe the term “unlock” scares a lot of people and makes them believe it’s something complicated to do, when really it’s as simple as downloading music onto your phone!