Actually multiple. My main line is T-Mobile postpaid (along with the $10 Watch addon). I also have a 6s on H2o Wireless (ATT network), and an SE On Red Pocket (ATT network).
On one iPad, I've also got T-Mobile on the $10/5GB/5mo plan so I can test T-Mobile's network to check if it's good enough to switch. Alas, answer is still no.
Trying out Xfinity Mobile. So far not bad 39.59 with tax. Got the 11 on a 250 discount. I’m on WiFi most of the time so 1GB is fine for me. I guess I can move it to unlimited if I need.
Verizon since 2002.
Hawaii resident with no complaint.
Bonus is free Disney+ for a year and now free Appletv for a year (upgraded from 6s plus to the 11 pro max.
Sprint. Speeds are fine with them never slowing me down even after using 150GB or more each month. Coverage is good for the most part with some dead spots on my commute but it’s in an area that doesn’t really matter anyways for me