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4.1 for Developers. Welcome to Android 4.3, a sweeter version of Jelly Bean!
Android 4.3 includes performance optimizations and great new features for users and developers. This document provides a glimpse of what's new for developers. See the Android 4.3 APIs document for a detailed look at the new developer APIs. Find out more about the new Jelly Bean features for users at www.android.com. Faster, Smoother, More Responsive. Developers.