How do I fix Error 1600 when Jailbreaking my 3GS

[AHDuke99]

If your trying to go from spirit to pwned 4 then yeah it isn't going to work. If you have SHSH's on file for 3.1.2 downgrade, redsn0w then restore to your custom iOS 4.

That's what I plan to do. I downgraded to 3.1.2 last night and Pwned it using PwnageTool 3.1.5 and unlocked. I assume all I do is build a custom 4.0 that is jailbroken and activated and update to that? That's what I plan to do.

 

[0970373]

Hi...I think I'm SOL on this but you know...want to make sure before I give up that I have no options:

On iPhone 3GS
What is your current firmware? 4.0
What is your bootrom (old or new)? Old
What's your jailbreak status? Never (Needed exchange a month ago, got refurb, but confirmed old bootrom)
If jailbroken, how did you jailbreak? N/A
How are you trying to jailbreak your phone? Pwnage, obv not going to work but is it possible to downgrade to 3.1.2 or 3.1.3 if I've never JB's this one before? So no shshwhatever on file I guess.

Let me know if hope if gone...for now.

 

[AHDuke99]

You are, sadly. Apple won't verify a downgrade to anything other than 4.0 and you lack the SHSH file on Cydia. I'm sorry...

 

[0970373]

You are, sadly. Apple won't verify a downgrade to anything other than 4.0 and you lack the SHSH file on Cydia. I'm sorry...

No worries. My fault for jumping the gun to 4.0. Thank you for your help!

 

[still in school]

I'm in the same boat with everyone else. I hope a fix comes out sooon