AT&T may be held up as one of the world’s most advanced 5G operators, but 5G is only third on its list of priorities for investment and deployment, according to chief of operations, Scott Mair. Mair told an investor conference that the operator’s first priority is currently the build-out of the FirstNet public safety network, which brings new spectrum and a valuable anchor tenant, as well as extending coverage to support other services. The second is expanding the LTE-Advanced network. This is a welcome sanity check – even operators in the forefront of 5G will still see greater returns from expanding their established 4G networks, in nearly all locations, for the next few years. Enhanced coverage and capacity for 4G…