According to a top Windows Mobile executive, Microsoft shipped some 4.5 million Windows Mobile devices during the first quarter of 2008, up 1.8 million units year over year.
The executive, Andy Lees, cited IDG figures showing that Apple sold only 1.8 million iPhones during the same quarter.
Lees, who replaced Pieter Knook earlier in 2008 at the helm of Microsoft's Windows Mobile business, called Windows Mobile a "gold rush of opportunity."
Lees was delivering a keynote speech at Microsoft's Worldwide Partner Conference.
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