Digital Trends – Yesterday, Samsung unveiled three new models of its flagship Galaxy S II phone, each variant destined for a different carrier (Sprint, AT&T, T-Mobile). We were on hand and took the time to try out both the AT&T and Sprint versions of the S II, which are, oddly, different from one another in a few ways. Samsung is clearly trying to build a universal brand with its Galaxy S phones, but it looks like each wireless carrier made a few of its own design tweaks to the phone. The Sprint model, for example, has a 4.5-inch screen, while the AT&T model is closer to resembling the 4.3-inch original Galaxy S II weâve been seeing at trade shows all year. T-Mobile is withholding information on its own version, but from behind the plastic we noticed that it has more rounded corners and a brushed plastic back instead of a textured back like every other version. All three versions run Android Gingerbread, which is nice considering âIce Cream Sandwichâ is about to come out.Â