It's been a little while since we saw the international Samsung Galaxy SIII (S3) receiving an Android 4.1 Jelly Bean update in Poland, and now it seems that the Galaxy S3 on the Now Network is poised to get its own update. A 4.1.1 build for the device has leaked out and packaged up for users to test their luck flashing over at the XDA forums, bearing the build number JRO03L.L710VPBLIF. Both Odexed and DeOdexed versions of the ROM are available, and as is usually the case with leaks like this, users are reporting mixed results using it as a daily driver.
If you're interested in doing some tinkering and want to try Jelly Bean on your Sprint Galaxy S3, hit the source link below. As always, flash at your own risk and do your self a favor by backing up first!
Source: XDA Forums; Thanks everyone who sent this in!