Don't listen all this tech oriented guys.
If before you use your iPhone as-is, you don't need any kind of Odins, firmwares et cetera. Samsung Kies found any official updates, and with two mouse clicks you can install this on your phone. Thats all.
Samsung Galaxy II have very impressive tech parameters, but really disappointing with software. It is reason why people looking for another ROMs flashing this trough Odin and so on, but still no one from this ROMs don't resolve all problems and bugs..
And keep in mind - in case of failure - you can brick your phone and/or loose guaranties..
And I agree with qwerty warrior..
Originally Posted by qwerty warrior
stay on the safe side
when u start learning more about android
then move to the next stage