This report provides information about the Market Share of Windows Phone, IPhone, Android phone and other Mobile OS products in United States comparing two quarters 2014 Q4 and 2015 Q4. In the last period, 2015 Q4, the largest presented item is Android phone with Market Share of 59.1%. The fastest growing participant in our report is Android phone with 24.16% growth in Market Share over 5 quarters between 2014 Q4 to 2015 Q4. The topic that suffers from the biggest downturn is Windows Phone with 57.89% decline over the same period. This report represents data points consolidated from 2 sources: Kantar Media and StatCounter