QUOTE(Jet23sky @ Mar 9 2012, 12:48 PM)
Wow thanks, may I know is there any efficient way to backup all my contact list and other information? I worry once i update it, my contact list disappear. Thanks sifu.... 
If not mistaken before you update your firmware, Kies will prompt you to backup your data, you can then backup with Kies.For contact I suggest you sync with Google Contacts.
SMS and so on you can download MyBackup Pro in Google Play, but whether will it be compatible to restore in ICS I'm not sure.
QUOTE(ian913 @ Mar 9 2012, 12:53 PM)
I would suggest to wait a few days until our XDA developers come out the Odin flash-able version. Watch out in Intratech thread.If you update through Kies you might get a new bootloader.
Kies is well known to cause problem as well.
Mar 9 2012, 12:56 PM

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