Originally Posted by fatguy666
Cheers for letting us know.
My girlfriend has the SGS2 and it was acting up a bit, told her she was as well waiting on ICS before doing anything.
Hopefully it's just a case backing up her phone then letting KIES do the rest cause she's gonna attempt it on her own :D
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If kies don't show any update then
Make sure its GT-i9100 model
Backup ur phone using kies, download
this and then extract and flash it through odin(i have given a link on how to use odin) then after update use kies to restore
But people are updating without data loss also but take a backup just in case
And if u are stuck on SGS2 logo after flashing then take battery out, put it back in,press and hold power+home+vol up at same time u will get in recovery, use vol buttons to get up and down and then select the factory reset option and select yes, it will wipe ur phone but u can restore it using kies if u had backed up before...