T-Mobile US, serving nearly 73 million customers, the U.S. mobile business of Deutsche Telekom, detailed its plans to roll out a nationwide 5G network, in conjunction with expanding and enhancing its LTE coverage, using a portion of its $8 billion portfolio of low-band 600 MHz spectrum acquired in the recent FCC auction.Under the program, T-Mobile US, the un-carrier, will leverage multiple spectrum bands to deliver nationwide mobile 5G coverage....