Yesterday Google officially presented Android 4.3 together with the new Nexus 7, which will ship with the newest version of Android.
http://www.notebookcheck.net/Android-4-3-revealed.97810.0.html
This has gotta be wrong. Android 4.3 is called Kit-Kat. And my Jelly bean Galaxy S4 says Android 4.2.2 and it was just updated. So what are you talking about? There is no 4.3 Jellybean.