If you have an older iPhone or other smartphone that you no longer use, there are a few ways to get some cash for it. One option is to sell your phone through a smartphone buy back program. This is a great way to get rid of old products and make room for new ones. If you're looking to cash for my iPhone, there are a few places to turn. Apple makes it very easy to get rid of your old phone by providing a simple online process. In recent years, manufacturers have been doing electronics buy back with their old products.