FINALLY MADE IT WORK! After experimenting things, I don't really know what's the real solution.. I just flashed it again, didn't return the GUPDATE.gcd and selected Singapore as Locale. Is it safe not to return back the original GUPDATE.gcd? Cause I think that's the one that makes it crash again after flashing FW.. Also, for future FW updates, do I still have to do those things all over again?