On Tuesday, introduced its nationwide 5G network. The nation’s largest carrier already has its fast Ultra Wideband service powered by high-band mmWave spectrum. The problem with mmWave is that the signals don’t travel far and can’t penetrate structures that well. But what they can do is deliver zippy fast download data speeds. Meanwhile, T-Mobile and AT&T have been able to deliver coast-to-coast nationwide 5G thanks to low-band spectrum. For example, T-Mobile’s 600MHz signals travel far but do not offer the data speeds that mmWave does.
