iphone 3gs already on ios4 - can i jailbreak - old bootrom

[bova80]

with snowbreeze it seems like from what i read you can jailbreak if you already are on ios4 but i can't make heads or tails from everything i read. and when i was creating the ispw snowbreeze says "sn0wbreeze has detected that this device cannot be jailbroken with snowbreeze unless it is already jailbroken"

so i take it that means i can't? i have checked that i'm running the old bootrom and everything.

 

[Imsuperjp]

you can check here to see if it can be jb.

http://jailbreakmatrix.com/

 

[thelatinist]

If you have your 3.1.2 SHSH saved you can downgrade to 3.1.2, jailbreak with redsn0w, then upgrade to a custom 4.0. Otherwise, there is currently no way to jailbreak a 3GS already at 4.0.

 

[bova80]

ok so i did jailbreak back when i had 3.1.2 or 3.1.3 i think and i saved that info to saurik. so all i need to do is downgrade to 3.1.2 then upgrade to 4.0 custom? i can't just restore to my 4.0 custom now?

 

[pixelated]

ok so i did jailbreak back when i had 3.1.2 or 3.1.3 i think and i saved that info to saurik. so all i need to do is downgrade to 3.1.2 then upgrade to 4.0 custom? i can't just restore to my 4.0 custom now?

no, your phone must be pwned to restore a custom 4.0, and it can only be pwned at 3.1.2 or lower

 

[thelatinist]

ok so i did jailbreak back when i had 3.1.2 or 3.1.3 i think and i saved that info to saurik. so all i need to do is downgrade to 3.1.2 then upgrade to 4.0 custom? i can't just restore to my 4.0 custom now?

Yes, assuming it was 3.1.2 that you saved your SHSH for. You will first need to edit your hosts file in order to downgrade using saurik's server.

no, your phone must be pwned to restore a custom 4.0, and it can only be pwned at 3.1.2 or lower

He said that he may have his 3.1.2 SHSH on file.

 

[pixelated]

He said that he may have his 3.1.2 SHSH on file.

yeah, my reply was just to the 'i can't just restore to my 4.0 custom now?' question... I followed it up by saying it had to be downgraded to be pwned.