When i put in my grandfather's AT&T Go-Phone sim card into my brothers activated 3G, it works fine, no need to do anything. When I put that same sim card into my Original activated iPhone, it tells me to connect to iTunes, and wants me to set up a plan. Same thing with a t-mobile sim, i put it in my brothers 3G, it doesn't lock up, just no signal, put it in mine, connect to iTunes.
When a 3G/3GS sees an AT&T sim card, it will work, when an Original iPhone sees an AT&T sim card, it will tell you to connect to iTunes for Activation. thats what the Spaz is trying to say. How ever when Spaz put his AT&T sim in his Original iphone, it acted like the 3G iPhone does when it sees a new sim.
Am I right?