Apple is reportedly still signing the SHSH blobs for iOS 4.1 on the iPhone 3GS and the iPod 2G, according to an iDB user.
I’ve found out awhile ago that Apple was still signing off firmware 4.1 for my 3GS , I’ve used SHSHit app to test this a few times now for the last 3 weeks and Apple is still signing it off..so if i’am right if you get a iPhone on 4.3.4/4.3.5 there is a very good chance that you could downgrade your device to 4.1 and have a untethered jailbreak..and you will be able to save those SHSH’s
This is great news for those users who are stuck with the tethered jailbreak on either 4.3.5 or 4.3.4. You will now be able to downgrade to the 4.1 and get yourself an untethered jailbreak, however Apple is only signing these firmwares for the iPhone 3GS and iPod Touch 2G, no love for the rest of the devices. We will advise all users to backup their SHSH blobs as soon as possible if you haven’t already before the window closes.