I have an iPhone 4 on 4.1 that is jailbroken and unlocked. Is there anyway I can upgrade to 5.0.1 and if so can I still unlock it? Unlocking it is not an absolute necessity, but need to upgrade and Jailbreak. Any advise on how to go about it will be greatly appreciated, especially since 5.0.1 is no longer the official iOS. Thanks in advance.