I have been using a Pine Phone on and off. I'm on USMobile, currently using their T-Mobile network though I have also used their AT& T network.
It works! Pretty reliably. I got a lot of help from Roger. I do wish I'd gotten the Convergence Edition with 3gb RAM rather than 2.
Actually the most annoying thing for me right now is that I don't have swipe typing on it, which I can't live without. But it seems that someone ("earboxer") has at least worked on something related; the other day I was thinking of contacting him to see what the status of that is.
I would love to have a little community of PinePhone (or other Linux phone) users in the Milwaukee area.