There are a lot of advantages to Apple's trade-in program indeed. First of all, it deals with the problem of iPhone sale and market saturation by making new devices cheaper thereby convincing users to upgrade sooner than they should. Second, for iPhones which are still in restorable condition, Apple replaces those, and sells them in developing markets and this way, it provides business in the pre-owned smartphones market providing a gadget that Only once needed to be made. Finally, for those phones which are not even sellable, there is Apple’s special robot Daisy which disassembles the phones for waste the companies goal of a closed loop supply chain. This option also helps in recovering the recyclable material hence reducing the environmental harm.