https://arstechnica.com/information-technology/2019/12/t-mobile-touts-nationwide-5g-that-fails-to-cover-130-million-americans/

T-Mobile today announced that it has launched "America's first nationwide 5G network," but T-Mobile's definition of "nationwide" doesn't include about 40% of the US population.

"America gets its first nationwide 5G network today, covering more than 200 million people and more than 1 million square miles," T-Mobile's announcement said.