T-Mobile will start offering the Apple iPhone 5 from April 12. The company is currently the only major US carrier not to offer Apple's popular smartphone.
T-Mobile is charging $100 up front, then another $20 per month for two years, on top of the service fees for voice, text and data that start at $50 per month - cheaper than others.
Customers could leave T-Mobile during that time, but would still have to pay the installments.
CEO John Legere said the lack of an iPhone "was such a huge void in our device portfolio".
T-Mobile's network has, until recently, not been able to offer high-speed data service to iPhones. It's now able to offer high-speed data to iPhones in some cities.