Android (operating system) top-selling platform in April 2011, overtaking BlackBerry OS with a 31.2% smartphone share, according to "comScore". By the third quarter of 2011, Gartner estimated that more than half (52.5%) of the smartphone sales belonged to Android. By the third quarter of 2012 Android had a 75% share of the global smartphone market according to the research firm IDC. In July 2011, Google said that 550,000 Android devices were being activated every day, up from 400,000 per day in May, and more than 100 million devices had been activated<ref name="i/o 2011 stats"></ref> with 4.4% growth per week. In September 2012, 500
Windows Mobile Windows Mobile's share of the smartphone market grew from its inception while new devices were being released. After peaking in 2007, it saw decline year-on-year. In Q1 2003, Windows Mobile was the third largest operating system in the smart handheld market, behind Symbian and Palm OS. In Q1 2004, Windows Mobile accounted for 23% of worldwide smartphone sales. Windows Mobile was projected in 2005 to overtake Symbian to become the leading mobile OS by 2010. In Q3 2004, Windows Mobile (CE) surpassed Palm OS to become the largest PDA operating system. In Q4 2005 Microsoft shipped 2.2 million PDAs, which