T-Mobile has once again reaped the benefits of its Sprint merger synergy as it received the July 2022 award for operating the best 5G network in the US. The score is given by the independent research agency Umlaut whose last report found T-Mobile with the largest 5G coverage and the most stable next-gen network.
T-Mobile vs AT&T vs Verizon 5G network quality

T-Mobile vs AT&T vs Verizon 5G network passive and active speeds
With the recent deployment of the C-band intermediate frequencies by Ma Bell and Big Red, the equation may change, but the process of catching up with T-Mobile will be slow and painful for them. The only category in which Verizon’s fast but very limited 5G network shines is overall latency.

T-Mobile vs AT&T vs Verizon 5G network latency, stability and coverage
Fortunately, AT&T and Verizon are ahead of T-Mobile in more important 4G LTE coverage, especially in rural areas, but the rapid deployment of the 5G network, enabled by the mid-band frequencies it inherited from Sprint, has now Made Big Magenta. the current market leader in places where it provides signal.
Umlaut’s tests are crowdsourced, ie done by people who tend to congregate in cities and especially in their more central areas where T-Mobile has coverage comparable to the best of them.