Xiaomi Mi A1 - How do I get LTE on this phone with TMO/ATT in the US? READ

[thetrickster213]

I have heard mixed things about the LTE bands that the Mi A1 supports. Can anyone clear this up for me - will the Mi A1 work on T-Mobile or AT&T or any of their prepaid or MVNO counterparts WITH LTE? I seem to only get 4G at best.

TIA, cheers!