Feb 15th, 2011: Google's Android operating system has transformed the mobile phone market with many of the biggest names in the industry joining its rapidly growing family. Mary Watkins, technology correspondent, reports on the effect that Android's runaway success is having on handset makers' margins and what it could mean for consumers. In light of this, we try and find out why Nokia chose to adapt Microsoft's Windows Phone 7 OS over Android, the current market leader.

For more on Google Android and Windows Phone 7, Nokia, HTC and their choice of OS, visit the Financial Times at: http://www.ft.com/video