T-Mobile will start carrying nano-SIM cards in mid October to allow owners of unlocked iPhone 5’s to jump carriers and join T-Mobile. They will be carrying unlocked iPhone 5’s in their stores and state that they plan to launch a few iPhone apps of their own. T-Mobile is hoping that with their more competitive priced rate plans this will lure more customers to their service. This also means that the iPhone 5 will now be available to more users. There is, however, a catch that customers should be aware of. The iPhone does not support T-Mobile’s 3G service. This means that if you don’t live in New York, Seattle, Washington, D.C., or Las Vegas, where T-Mobile’s iPhone-friendly 4G HSPA+ service is up and running; then you will only be receiving 2G speeds on your new iPhone 5.