Part of the reason that trade-in programs are gaining momentum for carriers is that the process has become much easier over the years. What was once a low-value, high-friction trade-in experience has been streamlined thanks to new technology.

From a consumer’s perspective, the process of buying a new phone often seems confusing. But in a world of smartphones and constant upgrades, there’s one piece of the process we’re all coming to understand—device trade-ins.