After Galaxy S3 have officially received update to android 4.1 jelly bean, now you can update your galaxy s3 to the latest version of android. In this new article I want to write the manual upgrade guide if you haven’t received the long-awaited Update notification via Over The Air. The guide is not very complex, but it is recommended only to those users who have some experience with Flash Rom via Odin. Download Odin to Flash from HERE Download the firmware from HERE Extract the contents of the downloaded package to a folder on your PC Open Odin in administrator mode.”]
Source: https://blooglog.blogspot.com/2013/02/how-to-update-samsung-galaxy-s3-to.html