The worldwide smartphone market is expected to grow 49.2% in 2011 as more consumers and enterprise users turn in their feature phones for smartphones with more advanced features. According to the International Data Corporation (IDC) Worldwide Quarterly Mobile Phone Tracker, smartphone vendors will ship more than 450 million smartphones in 2011 compared to the 303.4 million units shipped in 2010. Moreover, the smartphone market will grow more than four times faster than the overall mobile phone market. There should be around two billion smartphones by 2015 (based on about 500 million smartphones shipping in 2011, 2012, 2013, 2014, and 2015).
There will be about 300 million tablets in 2015 There should be over one billion tablets by 2020.
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