it seems like samsung is busy for this year as the company has plan to release the official 4.2.2 jellybean update for galaxy s3 and note 2 by november. It's late due to release of galaxy s4
read more here-http://androidfunapps.blogspot.in/2013/06/samsung-galaxy-s3galaxy-note-2-official.html
read more here-http://androidfunapps.blogspot.in/2013/06/samsung-galaxy-s3galaxy-note-2-official.html