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Is the new OS from android Jelly Bean be available for the Galaxy S3. If so How do you upgrade to it
The next iteration in the Android mobile OS - Jelly Bean - will indeed come to the Samsung Galaxy S3 but only in the 4th quarter of 2012, so you'll probably be getting it this fall. Samsung Galaxy S3, being Samsung's flagship phone, won't have any problems running the new operating system and it will bring new features like:
On the matter of actually installing the OS, you'll probably get the update from your mobile carrier when they receive it. Or if you have rooted your phone, once it comes out you can install it yourself. Either way, you'll enjoy the new Android 4.1 Jelly Bean soon enough.
I hope this helps.