There's something refreshing about T-Mobile’s new “un-carrier” strategy. The struggling No. 4 player in the U.S. wireless market has decided to ditch contracts altogether while separating the cost of the device from its new Simple Choice rate plans. Overall, consumers can save quite a bit of money versus AT&T, Sprint and Verizon. However, T-Mobile's plans aren't simple and straightforward as you might think, and there are plenty of caveats for every perk. Here’s a closer look at what subscribers are really getting — and what they’re not.