Back around when AT&T was first making noises about killing 3G and telling me I needed a new phone, I bought a T-Mobile prepaid SIM just to try it out. When I put the SIM in, the phone lit up like a Christmas tree with features that AT&T wouldn't allow (because it was a non-carrier phone). I since switched over and haven't looked back. Course it also helps that I've now got a T-Mobile tower on the same hill as my house, 1/4 mile away, and I live in a pretty rural area. So it's as if I have my own private tower. I regularly get 700-800mbps down on my phone at my house.
Living in a rural area, proximity to tower is just huge. We have the choice of either HughesNet for internet or pointing a Waveform antenna at a T-Mobile tower 7 miles away. We get 40 down and 2 up with the Waveform which is enough for zoom calls and is way more capable than HughesNet. If we didn’t have line of sight to the tower it would be so much worse.
For what it’s worth, I’ve regularly gotten 700-800 Mbps down in a relatively populated metropolitan area when in the US (T-Mobile, 5G), but it’s probably less consistent than your connection.