The US operators are in a constant battle to score points for 5G coverage, which shows how differentiation has shifted back to availability and reliability, not just data rates, in the early 5G era (coverage and network quality are part of operators’ marketing campaigns in many countries, in a way that was far less clear in the early 4G days, when peak data speeds ruled supreme). T-Mobile has consistently led the field since turning on ‘national’ 5G services in its 600 MHz spectrum. And while AT&T is chasing it hard for nationwide mobile coverage, and Verizon has entered the race with an iPhone tie-up and dynamic spectrum sharing, TMO’s headstart will be very difficult to neutralize in the near term…