From the article, "To that point, Microsoft had forced handset makers to obey strict rules about how they could customize Windows Phone 7, and they wanted the s

From the article, "To that point, Microsoft had forced handset makers to obey strict rules about how they could customize Windows Phone 7, and they wanted the same from Nokia. Not only did Nokia respond that it wanted the right to innovate freely, it asked Microsoft to commit to using Nokia technology as a foundation of the Windows Phone platform, particularly its detailed Navteq maps database."