Downgrading

[Chazz08]

I was wondering if there's a way to downgrade to an iOS not being signed any longer. I found some sites that walk through some steps to downgrade without iTunes, but it doesn't say if it will work with unsigned versions. If not, is there a way to get the signature hash for it? I have seen the ways to get those to downgrade, but my iPhone is already past the iOS I want.

 

[TiggrToo]

I was wondering if there's a way to downgrade to an iOS not being signed any longer. I found some sites that walk through some steps to downgrade without iTunes, but it doesn't say if it will work with unsigned versions. If not, is there a way to get the signature hash for it? I have seen the ways to get those to downgrade, but my iPhone is already past the iOS I want.

In a word, no.

The longer answer is that it's possibly possible to downgrade if (and only if) your device is already jailbroken.

 

[Banglazed]

It is only possible if you had saved SHSH blobs which you will need to restore or downgrade to said firmware again in the future even if it is not signed anymore.

 

[Chazz08]

It is only possible if you had saved SHSH blobs which you will need to restore or downgrade to said firmware again in the future even if it is not signed anymore.

That's what I was afraid of. I'm guessing the SHSH blobs are specific to each phone? I didn't know if I could get another iPhone X that hasn't been updated to the latest OS and use those blobs or not.
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In a word, no.

The longer answer is that it's possibly possible to downgrade if (and only if) your device is already jailbroken.

Well bummer. haha. Thanks! Guess I'll be waiting a lot longer.

 

[eyoungren]

I'm guessing the SHSH blobs are specific to each phone?

Yes. It's an encrypted hash between the specific device and Apple. Which also means you cannot use anyone else's blobs to downgrade.

Well bummer. haha. Thanks! Guess I'll be waiting a lot longer.

Yeah, the whole process has to start with that because it all relies on the phone already being jailbroken.

Or put another way, you can't do what you want until you first break out of Apple's jail.

 

[Chazz08]

Yes. It's an encrypted hash between the specific device and Apple. Which also means you cannot use anyone else's blobs to downgrade.


Yeah, the whole process has to start with that because it all relies on the phone already being jailbroken.

Or put another way, you can't do what you want until you first break out of Apple's jail.

Well, here's hoping the next jailbreak comes out sooner rather than later.