On 11 February 2011, Nokia announced a "strategic partnership" with Microsoft, under which it would adopt Windows Phone 7 as its primary operating system on smartphones, and integrate its services and platforms with its own, including Bing as search engine, and integration of Nokia Maps data into Bing Maps. Elop stated that Nokia chose not to use Android because of an apparent inability to "differentiate" its offerings, with critics also noting that his past ties to Microsoft may have also influenced the decision.
On 11 February 2011, Nokia announced a partnership with Microsoft that would see Nokia adopt Windows Phone as its primary smartphone platform, and Symbian would be gradually phased out, together with MeeGo. As a consequence, Symbian's market share fell, and application developers for Symbian dropped out rapidly. Research in June 2011 indicated that over 39% of mobile developers using Symbian at the time of publication were planning to abandon the platform.