They note Windows Phone 7 will benefit from Nokia’s support, scope, and breadth within markets where Nokia has historically had a strong presence.
For 2011, before the Nokia effect kicks in, the IDC expects around 18 million Windows Phone 7 handsets to be sold, taking 3.8% of the market. By 2015 this is expected to grow to 20.3% of the market, overtaking iOS with 16.9% of the share.
The IDC expects a total of 472 million smartphones to be shipped in 2011 compared to roughly 305 million units shipped in 2010. That figure will nearly double to 982 million by the end of 2015.
Read the full report at IDC here.