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