I live in Europe, but I’m originally from the US. I have a phone plan from my employer that I can use while abroad, so I don’t need data in really any circumstances. I want a way to have a US phone number to tie my messaging, financial and other applications too. Using my work number is not ideal. I could buy another SIM, but some of my US based stuff require a US number.
I know of Google Voice, but I would hope the Linux phone scene keeps moving forward to where I don’t need to be tied to Android or Google anymore.