I live in LA, and when switched to T-Mobile from Verizon (10 years ago). I had better experience with coverage in T-Mobile than I had with Verizon (for example

I live in LA, and when switched to T-Mobile from Verizon (10 years ago). I had better experience with coverage in T-Mobile than I had with Verizon (for example it didn't work in nearby Costco). I'm sure it isn't an issue right now, but basically back then T-Mobile didn't feel at all like a downgrade.