In the picture below you can see the Galaxy S II will be launched on Sprint Wireless, AT&T, and T-Mobile networks respectively. Verizon Wireless seems to be out of the list in the picture. The U.S. Samsung Galaxy SII differs from its rest as it lack of home button at the front. The edges of the T-Mobile and Sprint versions are also rounder than the ones of the Galaxy S II which we know so well.
Source/Image Credit: pocketnow