Android Jelly Bean

Android Jelly Bean (Android 4.1, 4.2, 4.3) is the codename for the tenth version of the Android mobile operating system developed by Google, spanning three major point releases (versions 4.1 through 4.3.1). Among the devices that were launched with Android 4.1 to 4.3 already installed are the Nexus 7 (2012), Nexus 4, Nexus 10, and Nexus 7 (2013).

The first of these three releases, 4.1, was unveiled at Google's I/O developer conference in May 2012. It focused on performance improvements to give the operating system a smoother, more responsive feel, improvements to the notification system that allow expandable notifications with action buttons, and other internal changes. Two more releases were made under the Jelly Bean name in October 2012 and July 2013, respectively, including 4.2—which included further optimizations, multi-user support for tablets, lock screen widgets, quick settings, and screensavers, and 4.3—which contained further improvements and updates to the underlying Android platform. The first device with Android Jelly Bean was the 2012 Nexus 7.