Forgive me for being so ignorant but I am very confused about the terminology associated with "unlocking" the iPhone. If someone would be so kind to explain the differences between Hacking Unlocking SIM unlocking When I get my iPhone, I want to attempt to (insert correct verb here) it so that I may use all of the features of the device except the phone. I want the email, the calendar... all of the rest of the features... minus the phone. And once my current cellular plan runs out, I want to be able to restore it and sign up with AT&T. So what is the correct term for what I want to do? Thanks!