Band 71 is T-Mobile’s long-range 5G frequency All major carriers—including T-Mobile—use bands in the 700 MHz range for long-distance cellular communication. Since 2017 T-Mobile has also been rolling out service on band 71 in the 600 MHz range .
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Band 71 can distribute Extended 4G LTE and 5G cellular data. T-Mobile set aside about 50% of the total capacity to build out their 5G network. So, it is used for 5G- but only in certain areas .
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