Starting today, T-Mobile will begin pushing Android 4.1.1 over the air and through the Samsung Kies app.
If you run into trouble, T-Mobile provides documentation to help you through the process.
Among other changes, Android Jelly Bean offer richer notifications, an improved Search app that also includes Google Now, and much more powerful Android Beam functionality.
When you get it, tell us how you like the update! Chime in below.