[iPhone] Is Apple still signing 6.0.1 for 3GS?

I have an old bootrom 3GS that was jailbroken untethered and unlocked on iOS 6.01 and also I had 6.0.1 blobs saved.
I got adventurous and upgraded to iOS 6.1. I was able to jailbreak untethered again using Redsn0w 9.15b3 but when I went to unlock it didn't work because I guess ultrasn0w fixer for 6.x does not work with 6.1 yet.

Anyhow, I thought no problem, Apple is probably still signing 6.0.1 so I will just restore, but no go -I get 3194 error. I guess this means 6.0.1 is no longer being signed- is that correct?
I have 6.0.1 blobs in cydia so I also tried a restore with an edited hosts file, but get error 1394 or error 1600 or error 21 in iTunes. No matter what I do I can't seem to go back to 6.0.1 (tried pwned DFU, DFU, regular shift restore).

Is this because I have an old bootrom 3GS and SHSH aren't handled properly or something??

Source: http://forums.macrumors.com/showthread.php?t=1534329&goto=newpost

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