Hi i have a samsung galaxy S2 and i was wondering how do i udate it for the the new software

Heres the details of what i have at the the moment

Model number - GT-I9100

Android Version - 2.3.3

Baseband Version - I900XXKDJ

Build Number - GINGERBREAD.XWKE2

I only have the phone 2 months so still gettin used to it but i would appreciate any help with telling me excatly how its done and what i benefit from updating

Thanks alot

Stokesy