Ktoonz, you know me. I always format /system 3 times and clear cache/dalvik 3 times. Only issue i had was music. I would play from the app and the screen would go black no album cover or anything and just reboot. I tried clearing data for that app and no go. Replacing the music.apk did the trick. As far as mms mine is gtg. I have the sensation rom hellraised on my work comp. Ill upload it monday. If you want ktoonz tool makes it so easy to do it maybe easier to try it yourself. You can have the rom hellraisef within 2 mins.
My SGS2 is Faster than yours.
S4 Golden Eye Rom