10 of 21Image
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.