if you have GT-I9100 model..you can flash ICS 1000 times, no PROBLEM.
Who told you , you cannot install it on your phone?
a STEPT BY STEP GUIDE FOR YOU"
Hold Volume down key+ Home button key and press power on, now you will see this screen, accept it
Connect your phone with USB cable and run ODIN You should get the message “Added! !” under the Odin’s message box in the bottom left.
Check only Auto reboot & F. Reset time in option
Put the files like this in Odin:
PDA = I9100_CODE_I9100XXLPB_CL99600_REV02_user_low_ship. tar,
PHONE = MODEM_I9100XXLPB_REV_02_CL1101286.tar,
CSC = GT-I9100-MULTI-CSC-OXXLP5_RST.tar,
Hit the start button and process will begin
You need to folow those steps...nothing else will happend, you will use your phone as before.
Sure, it will be some issues related to ICS(bugs that are not yet fixed.)..but that's it!
Cheers
