Surely you remember the Samsung GT-i9100, colloquially known as the Galaxy S II? Sammy's been tight-lipped about which US cellular carriers might offer it, but the Federal Communications Commission might have an idea. You see, the Exynos 4210-toting Super AMOLED Plus smartphone just made its way to the FCC authorization database, 850MHz and 1900MHz GSM frequencies in tow -- which just so happen to be the ones required to get a gig at AT&T. Mind y