Samsung has sold 3m Galaxy S II handsets since late April

"Samsung, the South Korean electronics giant, is about to be crowned the new leader in the mobile phone world after selling more than 3m units of its Galaxy S II smartphone since its debut in late April, and around 19m smartphones in all during the past quarter.
Analysts think that the Android-based Galaxy S II could be the company's best-selling model ever, with sales potentially hitting 20m units. Overall, the company could have captured 17% of the world smartphone in the past three months."

Source:  The Guardian, 5th July 2011