A custom rom for Android developers have successfully ported the latest operating system from Google to the Galaxy S III. OS 4.1.1 Jelly Bean portingan results from the Galaxy Nexus ran very smooth and fast and very stable (little bug). All applications and features of the Jelly Bean Galaxy Nexus runs perfectly on the Galaxy S III including Audio, Video, Camera, Video Camera, Browser, WiFi, 3G HSDPA, Gmail, Play Store, etc., as well as Google Now.
Galaxy SIII got early flavors of Jellybean, now comes a Stable Jellybean AOSP Android 4.1.1, with almost everything working.
In fact, according to reports from some users who’ve tried it say that the performance of the Galaxy S III with Android Jelly Bean is faster than Galaxy Nexus and Nexus 7 itself. Keep in mind because this OS is port of Jelly Bean (AOSP) for the Galaxy Nexus then do not expect the appearance of the TouchWiz UI, the default features such as Smart Stay S III, Pop Up Play, and so forth, and did not rule you will find some bug, but certainly this ROM safe and stable enough for normal everyday use. Click Here for Tread Galaxy S3 ROM