Android 4.3 that is yet to be released has leaked from a Google Play edition of the Samsung Galaxy S4. The Google Play Editions of the Samsung Galaxy S4 and the HTC One went on sale in the U.S. few days back. It would not be shipped until 9th July, but some got early access to the device. Sammobile obtained the screenshots that revealed the Galaxy S4 running stock Android 4.3. Later they released the stock ROM of the Android 4.3 for the Snapdragon version of the Galaxy S4 (GT-I9505).
The Android 4.3 with the build number JWR66N in the device is a test build firmware for the Google Play Edition Galaxy S4 (GT-I9505G) which is fully functional Snapdragon-powered Galaxy S4 (GT-I9505), says Sammobile. This doesn’t have any changes from the Android 4.2.2 running on the Google Play Edition Galaxy S4. Flashing this ROM will void your warranty, so try it at your own risk.
This has a new camera app that leaked recently, new live wallpaper , Bluetooth Low Energy support and more that are not available on the Android 4.2.2 (Jelly Bean) that was released for the Nexus devices earlier this year. The Android 4.3 is rumored to roll out for the Nexus devices this July.