Done! Android, the open source operating system Google has delighted in the first place Nokia OS for smartphones. Within three years he has managed to establish itself with the majority of smartphone manufacturers and its scope for growth is enormous. Winning bet for Google. Android, the open source operating system for smartphones and mobile handsets rose to Nokia's Symbian. It becomes the world's leading OS for smartphones . Already the first United States in the third quarter, Android has been only three months to conquer the world. In the fourth quarter of 2010, 32.9 million smartphones running Android were sold against 31 million for the Finnish manufacturer. As for its other two main competitors, they are far behind. The iPhone has a 16% market share and RIM peak at 14.6%.