I purchased an unopened 3.1.2 iphone 3gs a few weeks ago so I don't have any 3.1.2 shsh blobs. I have been using blackra1n since then. However, I would like to start using an untethered jailbreak. I don't care about having an unlocked phone as that is not a requirement. So do I need to upgrade to 3.1.3 and then run spirit or is there any other way for me to keep my 3.1.2 firmware without having any 3.1.2 shsh blobs?
Any help is appreciated.
please note that the phone needs to be ACTIVATED before running spirit.
it seems you can keep you 5.11 baseband and still upgrade to 3.1.3, that is if you need an unlock, as you cannot unlock (ie run blacksn0w) on 5.12 baseband (which is for 3.1.3). http://www.hackint0sh.org/f247/129972.htm
If you do not need or rely on an unlock you just upgrade to 3.1.3, activate then run spirit.