I have an iPhone 4 with iOS 4.3.5. and a baseband of 04.10.01, which I jail broke with RedSn0w. I don´t know if the base band upgraded after the jailbreak, as I didn´t remember to check it before doing it I´d like to jailbreak it and unlock it, being able to update it to iOS5 and other future updates. Have tried myself with Pwnage, and RedSn0w - can´t check if Pwnage works as the jailbreak appears unlocked and I don´t have the original carrier SIM anymore to activate it after, and RedSn0w can perform a jailbreak, but tethered, to iOS 4.3.5, and can´t unlock. Is it possible to unlock? If so, how can I do it? Worried about actually this been possible - for what I read this based band is complicated - took it to a shop for extra support but wanted to charge 130 euros for doing it. Does GSym cost that much actually? Would appreciate any advise Thanks!