I have an iPhone 4 on 4.0.1, never jailbroken. I am wondering if it is possible to JB it to 4.3.3, do I need SHSH to get it there (which I don't have)? If I don't do 4.3.3, can I JB it to 5.0.0 or 5.0.1? I don't mind the tethering but I would like to get it unlocked someday. Will my baseband be updated with the Mac JB? Thanks.