General: How to downgrade from iOS 6 to iOS 5.1.1

[kmj523]

How can this be done?

[cyks]

It can't be done.

But feel free to browse the similar threads:
http://forums.macrumors.com/showthread.php?t=1446195
forums.macrumors.com/showthread.php?t=1392965
forums.macrumors.com/showthread.php?t=1474683

[blair554]

I found a video tutorial on YouTube: http://www.youtube.com/watch?v=sRFLI...layer_embedded.
It has very detailed steps to teach how to downgrade iOS 6 to iOS 5.1.1 on A4 devices.

[NathanA]

Originally Posted by blair554

I found a video tutorial on YouTube:

This is not a universal solution. In fact, there is no universal solution. This only works if you have your SHSH blobs for 5.1.1 saved somewhere for your particular phone. If you don't, you're out of luck.

-- Nathan

[dhlizard]

Originally Posted by kmj523

How can this be done?

It depends on which model you have.

3GS and iPhone 4 - yes with saved 5.1.1 hash file
All other models - cannot be done even with saved hash file

[kmj523]

Where would these saved files be located at?

[NathanA]

Originally Posted by kmj523

Where would these saved files be located at?

They would only be saved if you explicitly saved them, or if you had previously jailbroken your phone and used Cydia.

If you didn't know about these files before and so didn't explicitly make an effort to save them before 6.0 was released, or if you have never jailbroken your phone, then you won't have these files. If you did, then you either should know where you saved the files to, or you can fetch them from Cydia's servers using TinyUmbrella.

-- Nathan

[Rodster]

Originally Posted by NathanA

They would only be saved if you explicitly saved them, or if you had previously jailbroken your phone and used Cydia.

If you didn't know about these files before and so didn't explicitly make an effort to save them before 6.0 was released, or if you have never jailbroken your phone, then you won't have these files. If you did, then you either should know where you saved the files to, or you can fetch them from Cydia's servers using TinyUmbrella.

-- Nathan

How would I save my iPad 2 blobs using iTunes? I want to save them in case I want to JB my iPad 2.

[NathanA]

Originally Posted by Rodster

How would I save my iPad 2 blobs using iTunes?

You can't. You have to use TinyUmbrella, which I linked to in my previous response. TinyUmbrella allows you to download the blobs for your device from Apple for the current version of iOS, as well as any blobs from past versions that you might have saved on Cydia.

Please note that you can't download the blobs directly from your device for whatever version of iOS it is currently running. So for example, if you are running 5.1.1, and 6.0.1 is the latest version from Apple, and you have never saved your blobs in the past, you can't "rip" copies of the 5.1.1 blobs from your device; the only blobs you can get are the ones that Apple's servers are serving up, which currently are the ones for 6.0.1. That is, you can only download blobs for the latest version from Apple at the point in time that you do the download.

-- Nathan

[Rodster]

Originally Posted by NathanA

You can't. You have to use TinyUmbrella, which I linked to in my previous response. TinyUmbrella allows you to download the blobs for your device from Apple for the current version of iOS, as well as any blobs from past versions that you might have saved on Cydia.

Please note that you can't download the blobs directly from your device for whatever version of iOS it is currently running. So for example, if you are running 5.1.1, and 6.0.1 is the latest version from Apple, and you have never saved your blobs in the past, you can't "rip" copies of the 5.1.1 blobs from your device; the only blobs you can get are the ones that Apple's servers are serving up, which currently are the ones for 6.0.1. That is, you can only download blobs for the latest version from Apple at the point in time that you do the download.

-- Nathan

Thanks, so I take it, it's too late for the 5.1.1 blobs? Any other sources which might have them or are they only available on Apple servers?

[NathanA]

Originally Posted by Rodster

Thanks, so I take it, it's too late for the 5.1.1 blobs? Any other sources which might have them or are they only available on Apple servers?

Only Apple knows the "secret sauce" (crypto keys) for making the blobs, so once they stop making them for older iOS versions, it is impossible to get them, and thus impossible to restore back to an older version.

You can't use someone else's blobs because blobs are specific to each phone, based on that phone's serial number. Since they are encrypted, there's no way to modify them.

-- Nathan

[kmj523]

My phone is jailbroken and not updated but people want to downgrade back to ios5 so there has to be a file somewhere

[labman]

Originally Posted by kmj523

My phone is jailbroken and not updated but people want to downgrade back to ios5 so there has to be a file somewhere

Nope!

[Rodster]

I've seen links referring to downgrading without shsh blobs. Is that all BS?

[labman]

Originally Posted by Rodster

I've seen links referring to downgrading without shsh blobs. Is that all BS?

yes

[Applejuiced]

Originally Posted by Rodster

I've seen links referring to downgrading without shsh blobs. Is that all BS?

There's links and youtube videos claiming all kinds of stuff.
Bigfoot, aliens, elvis still alive. You name it
Not everything you will find on the internet is true.

[labman]

Originally Posted by Applejuiced

There's links and youtube videos claiming all kinds of stuff.
Bigfoot, aliens, elvis still alive. You name it
Not everything you will find on the internet is true.

What about mermaids animal planet says there real. So they must be right?

[Applejuiced]

Originally Posted by labman

What about mermaids animal planet says there real. So they must be right?

Mermaids are real

[Siggen]

What if you have an A5 device, all blobs saved (iOS 4.x, iOS 5.x and iOS 6.x blobs), and use the restore function in redsn0w to go from 6.x to 4.x to 5.x ?

[TriJetHero]

Originally Posted by Siggen

What if you have an A5 device, all blobs saved (iOS 4.x, iOS 5.x and iOS 6.x blobs), and use the restore function in redsn0w to go from 6.x to 4.x to 5.x ?

Only for the iPad2 with blobs from 4.x and 5.x

Not for the 4S, once at iOS 6 there is (currently) no going back.

[dhlizard]

Originally Posted by Applejuiced

Mermaids are real

Image

Hey, I grew up in Florida.
Those scales look awfully familiar.
I think I dated that mermaid

----------

Originally Posted by Siggen

What if you have an A5 device, all blobs saved (iOS 4.x, iOS 5.x and iOS 6.x blobs), and use the restore function in redsn0w to go from 6.x to 4.x to 5.x ?

Read this blogpost carefully.
Every nuance about restoring/downgrading is explained.