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Apple iPhone 3GS: ~35 million
A minor update to Apple's breakthrough iPhone 3G, the Cupertino, Calif.-based technology giant may have sold as many as 35 million iPhone 3GS' since it first launched in 2009. Apple doesn't break down its iPhone sales by version, but according to analysts and preliminary sales of 1 million in the first weekend, sales remained high even into the December 2011 holiday season.
Samsung Galaxy S III: ~50 million
During the iPhone 5 and Samsung S III race to the top of the sales charts, Samsung breezed through the 30 million mark in September 2012. Then, Samsung came back to reporters only two months later to say that it had pushed through the 40 million mark. Three months later, the Korean smartphone maker would have likely added another 10 million to that total, making it one of the best selling phones in Western markets during 2012.
Image: CNET Asia
Apple iPhone 4: More than 50 million
Sporting a brand new design, Apple is estimated to have sold more than 50 million iPhone 4 handsets since it was first released in June 2010. With 1.7 million iPhone 4 handsets sold in just three days of availability, sales were boosted by the December holiday quarter. It remains on sale even today, three years later, adding to its continued success.