i have a iphone v1.0.2 and its been unlocked by turbosim(the dealer cut my sim card n put some sort of a strip over it)...i have all the 3rd party apps and all..now i want to update the firmware..

1.is it ok to follow the guide mentioned here..about virginizing the phone n all...
2.will i have to remove that turbosim chip after evrythng is done??

plz help..