Sprint is releasing the Android 4.1.1 Jelly Bean update to its Galaxy S III as we speak. The update is carried out over the air to consumers and each device that receives it will download it automatically.
Users will get Project Butter for a buttery-smooth UI, Google Now, expandable and actionable notifications in the Notification Area, the improved widget placing on any icon-ridden homescreen and lots of improvement and tweaks.
Galaxy S III owners in Europe have already received their Jelly Bean updates and now it's time for those in US to get the same treatment. Updates for the other carriers should come in the following weeks, or dare we say, days.
We've got a dedicated review of Jelly Bean on the Galaxy S III, which you should totally check out.