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Nokia 1100: More than 220 million
Surprise, surprise, a Nokia wins the top spot. The Nokia 1100 may look unceremonially brick-like but its basic features have helped the Finnish phone maker reach global success with this basic, monochrome display phone. Perfect for those on a shoestring budget, it doesn't have a camera or email, let alone a color display, but it sold -- thanks to its extremely low price -- more than 220 million devices by estimates. Launched in 2003, it may not have reached the cumulative success of Apple's iPhone, which has sold more than 300 million, but it surpasses every iPhone iteration by a long shot.