I am in the US, still have my N9 and N900, but I have some of the same issues as the OP. I'd love a Jolla phone, but the US compatibility is just not there very much. Right now, the option of porting Sailfish OS onto an Android phone seems closest to being available to someone like me.

I went the BlackBerry route for the time being, getting both a Z10 (~$200 USD) and a Z30 (~$345 USD). I'd highly recommend either phone, but if you can afford the Z30, get that because the higher specs make for a smoother experience. The BB10 OS has come a long way and version 10.3 and 10.3.1 are now available as leaks for the techies on Crackberry.com and will be official starting next month over the air.

I hope that there is more information about Jolla2 phone and that it has 4G LTE compatibility with T-Mobile USA.