Hi. Ok here is the thing. I just bought a used iPhone 3GS online and I got it today. It turns out that the iPhone was not factory unlocked, contrary to what seller had said. The seller seems to have vanished and so I'm left with the iPhone. I then updated the iPhone to the latest iOS, 4.3.3 (?). Now iTunes tells me that the sim card is not compatible with the iPhone, i.e. it is locked. Is it correct that iTunes automatically updated the baseband to the latest version they have when I updated the iPhone? Is there any way of unlocking or downgrading my baseband? Is it possible I have some other baseband despite my update? As I understand it, I can not jailbreak my iPhone with Redsnow since it's still locked. Is that correct? What are my current options, if any?