T-Mobile 5G goes live: The devices, coverage, and future

The T-Mobile 5G network has gone live in the US, with two new smartphones from OnePlus and Samsung, and the promise of 600MHz 5G service for more than 5,000 cities and towns. The activation, the carrier says, makes it the biggest 5G network in the US, collectively blanketing more than 1 million square miles with speedier service.