these bands also work
- FDD LTE:B1/B3/B5/B8
- TDD LTE:B38/B39/B40/B41
If you are meaning that you want LTE in the US, the PAR-LX9 should be good as it supports T-Mobile's B2, B4, and B12. The other devices may get you some 2G-3G, but that's the only one that has the capacity to get LTE. Of course, your mileage may vary and T-Mobile does not guarantee service to any non-T-Mobile phone.
(Granted, I'm still pretty green at the networking side of things, compatibility and bands and whatnot, I pray that if I'm steering you wrong, one of our wise community members will chime in!)
There is a handy website that can point you in the right direction when purchasing a new phone.