SHW-M250K swap to international firmware?

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http://forum.xda-developers.com – Hi sorry if this has already been covered but I have a friend who has the korean version s2 currently on 2.3.5 but wants to run unbranded international version of 4.0.4 on it mainly to get past the 90 character sms limit build in, among other things. I attempted to flash the latest unbranded version of 4.0.4 but odin crashes right as it is finishing flashing the factory image. I am back into download mode now, I assume the problem is the korean firmware? ie I can only flash a korean version of ics? is this correct? Thanks for any help (HowTos)