Before today, using an iPhone on T-Mobile's network meant a compromise on speed: unlocked handsets would get service, but only on EDGE. Thanks to spectrum refarming efforts that started last fall, the operator has been able to suddenly "turn on" 4G (the HSPA+ kind) for that grey market segment. But with Apple now bringing the iPhone 5 officially to T-Mobile's newly launched LTE lineup, the UnCarrier's subscriber base no longer has to trade down. Being the last of the major US carriers to be granted acce
