All four Tier 1 U.S. carriers are offering a mobile 5G service in parts of select markets. Of those four, AT&T, T-Mobile US and Verizon are all using high-frequency millimeter wave spectrum; Sprint is using its 2.5 GHz portfolio, which covers more than 100 metro areas. While the current focus is on millimeter wave deployment, there’s consensus in the industry that 5G will require a low-, mid- and high-band approach to provide coverage and capacity.
This week the U.S. Federal Communications Commission voted to open up the 2.5 GHz band for mobile services.
