Apple is planning to launch its own iPhone trade-in program later this month, sources say. The company is reportedly partnering with Brightstar, a phone distributor that already takes care of trade-ins at carriers like AT&T and T-Mobile, as well as some phone makers. Although the program means paying for used hardware, it could encourage people to upgrade to new products; AT&T for example is paying up to $200 for a working iPhone 4 or 4S, which is enough to cover a 16GB iPhone 5 on contract.