According to the FCC, the 920 CAN support tmobile USA

check out the FCC docs. AWS Band 4 support for WCDMA HSUPA and LTE.

What's up with all the discrepancies out there? Can someone settle this once and for all?

Not saying ATT won't be nimrods about it and disable AWS somehow, but that's what int'l unlocked phones are for, thank goodness.