The Pied Piper of the mobile industry is at it again, as T-Mobile CEO John Legere made one of the biggest announcements of his career to date. Today, T-Mobile became the first U.S. carrier to announce plans for a nationwide 5G network. The nation's third largest carrier will use some of the 600MHz spectrum it won during the FCC auction, to carry 5G traffic from one U.S. coast to the ...