ORLANDO, Fla. -

T-Mobile will start offering the iPhone 5 on April 12.

The company is currently the only major U.S. carrier not to offer Apple's popular smartphone. At an event in New York on Tuesday, CEO John Legere said the lack of an iPhone "was such a huge void in our device portfolio."

The company is taking a different approach to pricing and requirements.  It's charging $100 up front, then another $20 per month for two years for the device, on top of the service fees for voice, text and data that, starting at $50 per month, are cheaper than others. Customers could leave T-Mobile during the two-year period, but would still have to pay the installments.

T-Mobile's network has, until recently, not been able to offer high-speed data service to iPhones. It's now able to offer the service in some cities.