T-Mobile’s second promotion doesn’t take place for another year, but it’s a big deal. If you buy an iPhone 8 on an Equipment Installment Plan right now, you’ll be able to upgrade to next year’s iPhone for free when it comes out. T-Mobile will offer free upgrades to the 2018 iPhone when you trade-in an iPhone 8, 8 Plus, or X that is over 50% paid off.
