What you want is the i9020a...at least, that's what the internet will tell you. Read my reviews at Newegg and Amazon for that exact model. 3g was a no-go. It registered on the 3g network, showed 3g, showed HSPA in settings, but the speeds were so slow. Two different models, two brand new sim cards. Nothing would give me 3g speeds. The i9020a Amazon and Newegg sell is identical as the one from Negeri...the i9020a that was produced and intended for Rogers in Canada.
I don't know what the hell the issue was, but for the life of me in a heavily 3g covered area, I got slower than EDGE speeds and very unreliable data connections. Neither worked reliably for me.
I'd be very curious fo your or others' experience from purchasing the i9020a from Amazon / Newegg. I simply don't buy the fact that they work on AT&T 3g. Period.
That said, what is (if any) the difference from the Negeri i9020a and the Newegg / Amazon i9020a? I mean, as far as I can tell, they are the identical model, but some how everyone seems to glow about the over-priced Negeri one (which is cheaper elsewhere).