While T-Mobile USA has one of the world’s earliest nationwide deployments of 5G Standalone with the 5G core, its two larger rivals have missed several self-stated deadlines to deploy SA at scale, and are now just getting started, about two years after their original target dates. Executives have blamed shortage of devices and the wait for mature cloud-native core technology for the longer-than-expected timescales, though some observers have also pointed to uncertain demand for the high end, largely enterprise services that would justify the investment in rolling out 5G SA. AT&T, of course, took a radical step in June 2021, when it handed its network cloud, and the 5G core, to Microsoft Azure to develop and operate – and to…