With the cost of a new iPhone, it helps a lot if you can upgrade to a new one without having to pay the full price for one. Many of the larger carriers such as Sprint, T-Mobile, AT&T and Verizon will offer great upgrade prices to those who meet specific eligibility requirements. These requirements vary and can sometimes include such things as signing a new two year contact if you don’t all ready have a contract, switching from another carrier and signing up for a contract, have been a customer for a certain amount of time, or choose an early upgrade program.