Samsung Galaxy S4 and Galaxy S III getting Android 4.3 in October
Bluetooth Smart, earlier called Bluetooth Low Energy or Bluetooth LE, is intended for communication between low-energy devices like smart watches.
It's worth pointing out that the Samsung Galaxy S4 comes with Android 4.2, the previous version of Android, while the Galaxy S III is still stuck on Android 4.1, lacking features like lock-screen widgets, Daydream and wireless screen mirroring which were introduced with Android 4.2.
Android 4.3 includes features such as restricted profiles for limiting access to apps and content for different users of a device, dial-pad autocomplete, enhanced access to notifications, and a new camera app, among other user facing features. However, it brings many major changes, under the hood, including Open GL ES 3.0 high quality graphics in games and other apps and making Android devices Bluetooth Smart ready enabling support for low-energy Bluetooth Smart accessories like smart watches, heart rate monitors, pedometers, thermometers and many others.
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