Hi my iPhone 4 is currently on 5.0, tethered jailbroken with the untether fix. Would like to upgrade to 5.0.1, but my only concern is to preserve the baseband so I can keep the phone unlocked (currently with 01.59.00 baseband). Just wonder if it's worthy to upgrade and risk losing the baseband for unlock? Is there any unlock tool available now for jailbreaking 5.0.1 while keeping baseband? Any good experience with such tool. My priority is to keep the baseband so would like to ensure everything is fine before upgrading, otherwise will just stay with 5.0. Thanks for all the help. Have a wonderful day.