This document shows smartphone operating system market shares in percentages for various countries from the first quarter of 2012 to the first quarter of 2013. Android saw significant increases in market share across most countries, ranging from 1.4 percentage points in Australia to 16.7 percentage points in the US. iOS market share increased in some countries like Australia and Spain but decreased in others such as Japan and China. The market shares of other OSes like RIM, Symbian, and Windows decreased substantially in most countries over this period.