The iPhone 5 supports LTE on Band 4 (all spectrum), and T-Mobile's LTE is Band 4 AWS 1700 MHz. Also the iPhone supports 3G and HSPA+ on the 1900 MHz band (which t-mobile is rolling out now). This means that the latest iPhone can support all T-Mobile airwaves in the future. 


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Please get out of MacRumors, antroll.
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T-Mobile has several 4G phones that are light years ahead of this dated piece of junk.
Please get out of MacRumors, antroll.