T-Mobile has gone live with the first phase of its 5G NR Standalone (SA) network, which relies on a full 5G core. This is the first in the USA and one of the first in the world, though Telstra, China Mobile and others have also switched on some commercial SA elements. By deploying SA in its 600 MHz spectrum, TMO has expanded its 5G reach by 30% and its footprint now covers nearly 250m people in more than 7,500 markets across 1.3m square miles, according to the operator. Verizon has remained focused, so far, on fixed wireless and on a targeted build-out in millimeter wave. It will implement dynamic spectrum sharing (DSS) from later this year, which will enable it…