: Major carriers frequently offer aggressive trade-in promotions when you upgrade your plan. T-Mobile has been noted for consistently offering high trade-in prices regardless of your previous carrier.

: Walmart hosts ecoATM kiosks in over 3,000 locations. These self-service machines can inspect your phone and provide instant cash in about 7 minutes.

: If you are staying within the ecosystem, Apple offers credit toward a new purchase or an Apple Gift Card . While convenient, their trade-in values may be lower than market resale prices.

: One of the largest electronics retailers, Best Buy allows you to trade in various devices for a Best Buy eGift Card . You can get an Online Quote before visiting a store to lock in your value.

For those who prefer a physical location over mailing a device, several major retailers offer immediate trade-ins or cash payouts.