JEK
Senior Insider
Discovered a big difference with the 3G iPad over the iPhone. One must first authorized a 3G data plan through AT&T and wait for 24 hours after signing up for the service to be initialized with the local carrier. With the iPhone one can blunder abroad and run up a bill without any action other than turning International Roaming to ON. Seems like a safety net for travelers, but it took me some fine print reading to understand what was going on.