The document provides an overview of the major mobile operating systems including their market shares, features, and updates. It discusses iOS and its evolution with iOS 6, the beginnings of Android 1.5 and its update to Android 4.2 Jelly Bean, Windows Phone 8, and the late entry of Blackberry 10 to catch up with competitors. It concludes that significant changes in the mobile OS market have occurred with new players like Apple disrupting the market and occupying over 50% share, with continued innovation driving the space.