Sorry but it looks like according to Big Boss, Apple stopped signing version 3.1.2 for the iPhone firmware on Wednesday, February 3rd, 2010.

I’ve been getting a lot of traffic that last few days on my previous blog post about storing your TSS on Cydia so this post serves to provide updated info as of Saturday February 6th, 2010.

If you didn’t store your 3.1.2 firmware file before last Wednesday, Apple has closed the doors so you can’t roll back to 3.1.2. Not the end of the world but certainly a nice thing to have!

For example, on my 3GS,
I have both my 3.1 and 3.1.2 files stored on Saurik’s Cydia servers:

I was a bit lazy on my 2G so I didn’t store 3.1.2.

This isn’t a big deal as long as you go from one jailbroke version the next. Make sure when you’re creating your .IPSW files that you are VERY CAREFUL to restore the correct one!

This where people make the mistake restore the “vanilla” one versus the jailbroke one. I always name my custom restores in ALL CAPS like:

CUSTOM-iphone3gs-312.ipsw

That way if I’ve had a few on the show while jailbreaking, there’s little chance of me making a mistake.

I will not be upgrading to 3.1.3 and will wait for the iPhone Dev Team to release the next jailbreak.