Verizon is adding 4x4 MIMO and I expect all of the US providers will be doing so because spectrum is a scarce and very expensive resource and at least in the ca

Verizon is adding 4x4 MIMO and I expect all of the US providers will be doing so because spectrum is a scarce and very expensive resource and at least in the case of Verizon, use is increasing substantially. While the 4x4 MIMO requires the 4 antennas, the 256 QAM can be provided by a firmware upgrade without the 4 antennas.