The lower the frequency, the better the indoor coverage...

Remember those annoying maps that Verizon used to show with all of the red for them and a little magenta for T-Mobile? Well, they can no longer show those because T-Mobile caught up with coverage. The biggest benefit that AT&T and Verizon had was ownership of 700mHZ while the other guys had 1700mHZ and above. Well, last year T-Mobile spent $435 on 700mHZ bandwidth. They now work in doors far better. Earlier this year, they won the 600mHZ spectrum auction with an $8 billion purchase. They are building out their 600mHZ network and both LG and Samsung already have devices on the market that support it. Next year, when Apple joins the 600mHZ party and adds "Band 71" support, AT&T and Verizon are going to be in deep trouble...

Here are the current USA frequencies being used. T-Mobile will be the only major carrier with 600mHZ so next year, they should surpass all of the carriers for coverage. They already win for data speeds in most markets.