I use it as my only phone, and I manage about a week of battery on it in good coverage areas. The English keyboard works great, symbols and input are as expected. Text prediction works as expected, I haven't had any issues with it trying to use British predictions instead of American. Maps are just fine (especially if you still use the old maps rpm from the Jolla 1), GPS lock is near-instant, weather updates accordingly. Only major cities listed for timezones, but shouldn't matter as long as you know your GMT offset. OS updates don't need a VPN - though they do seem to be ratelimited or throttled when using a US connection. I often fire up a Finland VPN before pulling updates because it just goes so much faster. Let me know if there are any other use cases you're concerned with, and I'll be glad to check them out and report back.