The document summarizes key aspects of the mobile ecosystem, including networks, carriers, platforms, manufacturers, developers, enterprises, and types of mobile users. It discusses changes in power dynamics between these groups and provides data on smartphone operating system market shares and worldwide smartphone and tablet sales in 2011. Trends covered include apps surpassing the web, mobile fragmentation, the growth of mobile communities, and the internet of things. The mobile ecosystem life spans of platforms and notable platforms/operating systems are examined. The mobile app development process and importance of user experience are also summarized.