Apple and T-Mobile have just now pushed the Carrier Bundle (ipcc) that enables T-Mobile LTE for the iPhone 5 (and just enables general service for all the other iPhones). If you have an iPhone 3GS/4/4S/5, this update will be available to you by going to the About Phone page in Settings.
Update: As some of you have mentioned, there is no mention of LTE specifically in the body of the image below. Word from our sources is that this carrier update will enable LTE and it makes sense, given that seven LTE markets are live and a carrier .ipcc update is all that’s required to do so. As T-Mobile customers using unlocked AT&T or unlocked iPhone devices have had some lingering questions regarding … [read full article]