Types of SHSH Blobs

[Yeuds]

Hello,

Is it possible to downgrade a 3gs with ERASE or UPDATE's type Blobs ?
Thank you for your answers.

John

 

[Yeuds]

Was my question misconceived or incomprehensible ?

John

 

[bbrks]

To be quite honest .....there is only one sort of SHSH blobs, either you have them or not

 

[darricksailo]

Hello,

Is it possible to downgrade a 3gs with ERASE or UPDATE's type Blobs ?
Thank you for your answers.

John

Fetch your blob using iFaith, redsn0w, or an older version of tinyumbrella (these fetch the latest from Apple directly while older ones are fetched from cydia's server, if they were saved)

These won't be differentiated between "erase" or "update". As said above, you either have them or you don't

Since it's a 3GS, as long as you have valid SHSH blobs, you can downgrade iOS 7 and below. You just need to stitch the blobs into an ipsw for its respective version using iFaith or redsn0w. Put device into PWNed DFU mode and restore with the custom made ipsw

Of course, downgrading too far "down" may also cause baseband problems

And as far as I'm aware of, even older devices CURRENTLY cannot restore to any iOS 8.x firmware