This is a new variation of the Samsung Galaxy S II, which supports 850MHz and 1900MHz GSM frequencies.
If you’re thinking, that you have already seen the AT&T ready S II, well.. you did. But this model is different. It comes with a model number -- GT-I9103.
The bad news is that you can’t pick it up at the local AT&T shop, if it’s not situated in St. Petersburg Russia.