I am using Mint Mobile’s unlimited plan and paying peanuts compared to my partner’s Verizon plan. But their signal is often completely fine where mine even an hour or two outside of a major metro is bad to unusable. Doubly so in large buildings.
Then Verizon bought them and forced everyone on their network. My in-city speeds went down significantly (as in, over 75Mbps slower) in the city, and the coverage in rural areas was not any better than my spouse who's on AT&T.
Verizon missed the boat on 5G, they are no longer the one stop shop for coverage that they were.
Verizon certainly have but have an excellent network and brand name. At the moment, T Mobile have the most amount of spectrum bandwidth available