The city of Shenzen will likely have more (robust) 5G radios deployed than either Verizon or AT&T for the next year. Robert Clarke reports Shenzen will have 15,000 5G radios in the next few months and 45,000 by August. One Chinese city has more 5G than the entire United States.
Neither Verizon nor AT&T have provided any real information about coverage but their figures likely will be lower. There is no technical reason for delay. The technology now is working for over 10 million people. The limiting factor is the carriers' investment budgets. In the West, investment has been flat to down.
Verizon & AT&T each have 60-70,000 towers and have virtually stopped adding macrocells. Well under half will be upgraded to mid-band or mmWave 5G. Verizon is adding some small cells, but probably not enough to match Shenzen figure.