According to research firm Canalys, Apple’s iPhone OS accounted for about 15% of smartphones sold last year, running third behind phones using Nokia’s Symbian OS and Research in Motion’s OS.

Those own 47% and 21% of the market, respectively, according to “TheStreet” ( While Apple has grown much faster than those two brands, it still lags by almost 10 million units, the article adds.

Nokia’s Symbian is selling more than twice the units of its closest competitor. But given that sales growth is in the low single digits, the big movers could overtake it sooner rather than later, says “TheStreet.” Research in Motion and Apple could overtake Nokia in about three years based on current growth rates.