The update should have been released slightly earlier
It looks like Sprint ran into some troubles and could not release the Android 4.3 Jelly Bean update for Samsung Galaxy S III on November 6, as previous rumors suggested.Today, GottaBeMobile reports it has received some insight that claims Android 4.3 update will arrive on Sprint for both Samsung Galaxy Note 2 and Galaxy S III on November 20.
Both software builds have already appeared on Sprint's website, but the files have yet to be pushed live. Android 4.3 firmware L710VPUCMK3 for Galaxy S III and firmware L900VPUBMK1 are likely to be final versions of the upgrade.
The bad news is even of both updates popped up on the carrier's website, there's no telling when exactly they will go live, so we can only wait and see if the cited source is reliable. Stay tuned for more info on the matter.