T-Mobile and Verizon 4G speed bumps hint at a 5G revolution

ANALYSIS: With 5G only months away from debuting in the U.S., carriers have quietly -- and not-so-quietly -- been upgrading their towers to prepare for higher-speed 5G devices. Now OpenSignal is quantifying what those upgrades are already doing for users of current-generation 4G devices, and the initial results are promising.