send it back!! i was going to buy a blu phone i think i'll get this instead https://www.amazon.com/dp/B071YC3G5V/ref=br_imp_ara-3?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=detail-ilm&pf_rd_r=A9QKSRP8AB3Q614ESGFH&pf_rd_t=201&pf_rd_p=3080950002&pf_rd_i=B071YC3G5V
They don't auto shift between carriers, but if you have solid T-Mobile signal near you, they work well with the Fi SIM cards.
Good holdovers till Pixel 2 or the new Fi compatible Moto.
Also - The Amazon versions work fine with Fi as well.