can any one help me. i upgraded my bb 8300 os to 4.5.0.124 indosat.before one month. but now i am having still higher version with me but it is vodaphone's os. now my doubt is why i am not able to upgrade that os to my bb. wat is the difference between indosat os and other os. after installing vodafone os to my system my loader is not showing that os in install menu.