Samsung proudly announces the sales units of Samsung Galaxy S II as 3 Million units in just 55 days. The Android Smartphone Samsung Galaxy S II was the fastest selling smartphone in the history of Samsung. The earlier record held by Samsung Galaxy S, where the phone makes a record selling 3 million units in 85 days back in 2010.Samsung Galaxy S II I9100 was announced at MWC (Mobile World Congress) 2011 held at Barcelona. This device was the first iteration of the flagship phone Samsung Galaxy S. Apparently, this device was the most advanced smartphone from Samsung till date and successful. Samsung Galaxy S II brings a fastest Dual-core processor and a large display. This smartphone runs the latest Android OS v2.3 Gingerbread and Samsung TouchWiz 4.0 UI.