The following wireless carriers are supported and good-to-go:
USA: AT&T, Cingular, Verizon Wireless, and T-Mobile
Canada: Rogers
India: Oasis, Hutch Mumbai, Hutch Delhi, Hutch Gujrat, Hutch Kolkata, Hutch South, Hutch ADIL, Escotel UP, Escotel Haryana, Escotel Kerala, Airtel Delhi, Airtel Punjab, Airtel AP, Airtel Karnataka, Airtel Chennai, Airtel Mumbai, Airtel Kolkata, RPG India, Spice Karnataka, Spice Punjab, Reliance India, TataTele India, Idea AP, Idea Delhi, Idea Maharashtra, Idea MP, and Idea Gujarat
Australia: Telstra and Vodafone
Philippines: Smart and Globe Telecom
Hong Kong: Hutchinson
Singapore: M1 and Starhub
Thailand: DTAC, AIS Thailand
Malaysia: TMTouch and Maxis
Indonesia: Telkomsel and Excelcom
Bolivia: Entel Movil
Argentina: Telecom Personal
Kuwait Wataniya