I have an iPhone 3gs with old bootroom. It currently has jailbroken iOS4 installed with baseband 5.11.07. I have SHSH on file for 3.1, 3.1.2, and 3.1.3. What I would want to know is if its a good idea to upgrade the baseband to 5.12 or leave it at 5.11.07 with iOS4? I have installed blacksn0w to unlock which is not stable if I have 3G switched on. Please advice if I should update the baseband or not?