iPhone Upgrade Program customers can now trade in phones through the mail
https://www.theverge.com/2017/9/11/16290644/apple-iphone-upgrade-program-customers-trade-in-kit-mail
Apple seems to be making it easier to trade in iPhones through the iPhone Upgrade Program with a new mail-in kit option, as spotted by John Angarano over at the MacRumors forums.
Apple launched the iPhone Upgrade Program two years ago alongside the iPhone 6S as an alternative for customers looking to upgrade their phone without being tied to any one carrier. But if you were looking to upgrade your phone to a new model, you had to schedule an appointment in an Apple Store to trade in the old phone, something that seems to finally be changing with the new mail-in kit.