The worldwide smartphone market is forecast to grow 55% year over year in 2011 as a growing number of users turn in their feature phones for more advanced devices.
According to the IDC, vendors will ship a total of 472 million smartphones in 2011 compared to roughly 305 million units shipped in 2010. That figure will nearly double to 982 million by the end of 2015.
IDC claims that Windows Phone 7/Windows Mobile will benefit from Nokia's support. Until Nokia begins introducing WP-powered smartphones in large volumes in 2012, WP7/WinMo will only capture a small share of the market as the release of Mango-powered smartphones aren't expected to reach the market until late 2011. The WP7 platform will overtake the market share of the iPhone by 2015.
Android to grow to more than 40% of the market in the second half of 2011.
Symbian, still, Nokia's commitment to support Symbian devices until 2016.
iOS was the third ranked OS going into 2011 and will remain a force in the mobile phone market throughout the forecast. A small market share decline is expected, IDC expects significant overall shipment volume growth through the end of 2015.
BlackBerry OS is expected to maintain its position as a Top 4 smartphone operating system over the forecast period.