jelly upgrade advice please help

veko1962

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Apr 19, 2013
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HI ALL
I need advice on if I can upgrade to jelly bean from gingerbread
I have a Samsung galaxy s2 gtI9100 locked to o2 UK-
-android version 2..3.3
--baseband version I9100xxke7
--kernel version 2.6.35.7-I9100xwkf3-CL276555root@DELL101#2
--GINGERBREAD.XWKF3
with this info can anyone advise me can if I update to jellybean and which is the best guide to use and where do I get the files needed.
do I need to root or unlock before update
THANKS FOR YOUR HELP
 
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