The document discusses the fall of Nokia's mobile dominance and its partnership with Microsoft. It notes that in the 2000s, Nokia had over 35% of the global mobile market and over 73% of the smartphone market, but that its market share declined rapidly after 2007. In 2011, Nokia's CEO acknowledged in a memo that the company was "standing on a burning platform" and not innovating fast enough. Shortly after, Nokia announced a partnership with Microsoft to use its Windows platform instead of Nokia's own Symbian software. In 2013, Microsoft fully acquired Nokia's mobile business for $7.2 billion.