I know it sounds like a well repeated question, but please read on... I've tried to look for solution online, but I don't seems to find people with the exactly same situation as I do. My iPhone 3G (not 3Gs) was bought in Australia, it comes with the career sim-lock, but I've unlock it by calling the career and got the activation code. -it has never jailbroken before -it's on firmware 3.1.3 -its baseband is 5.12.01 I've a few question before I jailbreak: 1. Will I be losing the career unlock if I use any of the jailbreak? 2. Which jailbreak tool should I use? I've tried sn0wbreeze, and it's giving me a error and does not permitting me to jailbreak. 3. Is the itunes 9.1.1 capable in jailbreaking or an earlier version is required? Thank you for reading my post and a simple answer (yes/no/ name of the software) will be greatly appreciated.