Samsung do not have a Jellybean rom released at the moment, although they will do in the very near future.
It would be better to install a custom rom such as CyanogenMod 9 [Ice Cream Sandwich] or 10 [Jellybean].
CyanogenMod is updated Nightly and is buttery smooth on Jellybean, best of all it is not bloated with Samsung or your providers apps so runs a lot quicker, uses less memory at boot and less storage space is consumed.
However, if you do wish to go back to stock then there is an excellent thread over on XDA here:
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.