The unit I'm looking at :
HTC One X 3G Unlocked Android GSM Quad-Core 1.5GHz
Wireless radio: GSM 850 / 900 / 1800 / 1900 MHz
UMTS 850 / 900 / 1900 / 2100 MHz
Data transfer:GPRS, EDGE, HSDPA, Wi-Fi
Listed as compatible are AT&T, AT&T 3G, T-Mobile, Rogers, Fido (but not explicitly Telus...