Today Samsung unveiled their highly popular Galaxy S II device for three of the four major carriers. Their event in New York kicked off with a bang as AT&T, T-Mobile and Sprint opened the curtain on what appears to be the biggest smartphone of the year thus far. And when we say big, we mean big. Aside from the AT&T version, which sports a 4.3-inch Super AMOLED Plus display, all other devices are sporting a whopping 4.5-inch display. Check out the slides of the main points in the presentation for the US version of the Galaxy S II and note the new features added which the original Galaxy S II device doesn’t have. Don’t forget to let us know what you think in the comments below. Stay tuned for quick looks and hands on coming shortly.