Your shipment info should say if it’s A, E or T variant (T1 is shipped to Australian orders, if I’m not mistaken, “rest of the world”). Also, if you open the back of the phone, the card has the variant code on in (“MCode BM818-X1” where X marks the spot).
For general specs, see: Choosing the Modem - #26 by BrentMpls and for the differences of each variant (which bands/freqs they support), see: Will my existing SIM card work? What countries and networks will be supported? – Purism (and for comparing to your local area available bands, see frequencycheck.com/). Although, not sure what those specs will help in this particular predicament (you’re probably looking for something else).