T-Mobile U.S.A. is finally getting Apple’s iPhone

The U.S.'s fourth largest carrier will sell the devices contract-free

FORTUNE -- Six years after Steve Jobs unveiled the iPhone, Deutsche Telekom's (DTE) U.S. subsidiary -- T-Mobile U.S.A. -- announced Tuesday that it has finally cut a deal to carry Apple's (AAPL) line of smartphones, starting April 12.

To differentiate itself from AT&T (T), Verizon (VZ) and Sprint (S) --...