Windows Phone OS ajajoon By facebooker_1140334132673686 Jan 1, 2000 Pocket PC 2000 Period: Jan 1, 2000 to Dec 31, 2013 Windows Phone Feb 8, 2002 Pocket PC 2002 Feb 8, 2003 Mobile 2003 Feb 8, 2005 Mobile 5 Feb 8, 2007 Mobile 6.x Feb 8, 2010 Phone 7.x Feb 8, 2013 Windows 8.x