The 6g version has 3 t mobile bands. 2, 4, 12.Prices are dropping, just saw aliexpress 8/256 version $623. Interestingly, the 6GB RAM/128 GB doesn't have enough LTE bands to be used in the US, only the higher 8/10 RAM version will do. Good site here(kimovil) for references on almost every phone in the world:
Think it would be worth paying the bit extra, sure you will recover any money on resale.Checked again, it is $623 but I overlooked something else, I think only the 8gb/10gb 256GB storage has extended LTE for US, the other phones show only 7 matching bands out of 14(4G) - vs 12 out of 14 with band 66 included for 8/10gb 256GB, no 71 band which is fine.
I guess, I missed the conversion:
I do not have the source but what I have read (correct me) only the 256gb/8gb version has the B66. I would stick to the international ROM for t-mobile. The reason being is it may (correct me) have volte. You have a better chance of getting that if that is important.