Nokia CEO Stephen Elop revealed at MWC 2011 in Barcelona that the company's first priority is beating Android:
The decision to choose WP7 over Android was an easy one for Nokia, which Elop clarified when he later said "We obviously made the decision to go Windows Phone. We made the decision for a whole variety of reasons, but to understand it more, you need to understand how Microsoft viewed this opportunity to make sure there were more than two ecosystems." Which then led him to say "A decision to go with Windows Phone creates a very different dynamic [as opposed to Android]. Windows Phone is a challenger. It becomes a three-horse race."