3.1.2 unlocked and untethered iphone 3gs
I have a 3gs, 3.1.2, unlocked and jailbroken via blackra1n.
It is an untethered unlock and jailbreak, and i can restart it and retain both the unlock and jailbreak.
I have not stored my 3.1.2 hashes, only my 3.1.3 hashes via cydia.
It is working fine at the moment, but if i ever need to restore it, can I restore to 3.1.2 even though the hashes are not stored anywhere, or can i upgrade to 3.1.3 and retain my baseband using a custom 3.1.3 firmware.
Any help will be appreciated.