I'm trying to upgrade 4.01 to 6.1.2 - can't get past the Blobs!

[Trackr]

So, I have 4.01 on my iPhone 4 and I want to upgrade to 6.1.2 for the untethered jailbreak.

But I'm being told that I need the correct SHSH Blobs, and I have absolutely no idea where to get them.

Advice?

 

[BLiNK]

you had to of been on 6.1.2 in order to save your SHSH blobs (blobs are device specific)

however, since you own an iPhone 4 i think you can jailbreak 6.1.3 (Untethered) can someone confirm this?

 

[natasftw]

He can jailbreak semi-untethered. He'll reboot without jailbreak functionality, but it will boot without being tied to a computer.