Alternative smart phones in the USA?

I've been looking into potentially switching to an alternative smart phone, something like the Jolla phone with sailfish OS, the fairphone, etc. I think something like that would be excellent for what I want my smart phone to do, and I'm tired of the one I have. However from what I've read online, they don't really seem to work well in the USA. I am on T mobile which seems to work better than other providers, but I was wondering if any of the fine people on Lemmy have actual experience they can share.