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Old Oct 25, 2012, 12:27 PM   #1
hypotc
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Possible to downgrade from iOS 6 to 5.1.1 and jailbreak again? (iPhone 4S)

Hello.

I'm wondering if it's possible to downgrade from iOS6 to 5.1.1 and rejailbreak the phone. I borrowed the phone from my brother, who had jailbreaked it. When I got it I did a fresh reinstall without jailbreak, and later upgraded to iOS6.

Has anyone done this?


Thankful for answers!
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Old Oct 25, 2012, 12:31 PM   #2
Intell
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It is not possible to downgrade an iPhone 4S from iOS 6 to 5.
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Old Oct 25, 2012, 12:37 PM   #3
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I'm fairly sure you can restore an iPhone to any compatible OS providing you have the .ipsw file? I've done it in the past with a 3GS.
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Old Oct 25, 2012, 12:38 PM   #4
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Quote:
Originally Posted by Xcallibur View Post
I'm fairly sure you can restore an iPhone to any compatible OS providing you have the .ipsw file? I've done it in the past with a 3GS.
He's talking about a 4S. And you don't just need the ipsw you also need blobs.
And like intel said its not possible at the moment even with saved shsh blobs.
You're not as educated on the topic so don't post false assumptions.
What worked before with another phone model does not work now.
Apple makes it harder with every hardware and software update.
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Old Oct 25, 2012, 01:13 PM   #5
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Yep, Juice is correct.

Once on iOS6 with a 4S, you cannot go back
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Old Oct 25, 2012, 01:18 PM   #6
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Quote:
Originally Posted by Applejuiced View Post
He's talking about a 4S. And you don't just need the ipsw you also need blobs.
And like intel said its not possible at the moment even with saved shsh blobs.
You're not as educated on the topic so don't post false assumptions.
What worked before with another phone model does not work now.
Apple makes it harder with every hardware and software update.
I realise he was talking about a 4S; hence my point ending as a question, it seemed reasonable to assume it may be possible to do what I did to a newer model.
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Old Oct 25, 2012, 01:31 PM   #7
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Originally Posted by Xcallibur View Post
I realise he was talking about a 4S; hence my point ending as a question, it seemed reasonable to assume it may be possible to do what I did to a newer model.
No. It's not reasonable to assume cause its false.
If you don't know don't respond cause you're giving him false hope on something that cannot be done currently.
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Old Oct 25, 2012, 01:51 PM   #8
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Quote:
Originally Posted by Applejuiced View Post
No. It's not reasonable to assume cause its false.
If you don't know don't respond cause you're giving him false hope on something that cannot be done currently.
I don't see how it isn't reasonable to be honest, its by the same manufacturer, running a newer version of the firmware, host to a new set of hardware, simply an update. Generally updates stay to the foundations of their last versions.

Besides, what is it that stops the downgrade to iOS5 after installing iOS6? Is there a check on the firmware version that only allows the latest iOS to be installed?
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Old Oct 25, 2012, 02:42 PM   #9
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Quote:
Originally Posted by Xcallibur View Post
I don't see how it isn't reasonable to be honest, its by the same manufacturer, running a newer version of the firmware, host to a new set of hardware, simply an update. Generally updates stay to the foundations of their last versions.

Besides, what is it that stops the downgrade to iOS5 after installing iOS6? Is there a check on the firmware version that only allows the latest iOS to be installed?
Yes, many many different things stopping it for happen. Like you said newer hardware, firmware and newer security measures. With each update it becomes harder to JB and to downgrade, restore to older firmware etc...
They dont stay on foundations of last versions, they keep improving security.
You should learn and research more before responding in similar threads.
It would be really nice it if was that easy or simple but its not.
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Old Oct 25, 2012, 02:43 PM   #10
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Quote:
Originally Posted by Xcallibur View Post
I don't see how it isn't reasonable to be honest, its by the same manufacturer, running a newer version of the firmware, host to a new set of hardware, simply an update. Generally updates stay to the foundations of their last versions.

Besides, what is it that stops the downgrade to iOS5 after installing iOS6? Is there a check on the firmware version that only allows the latest iOS to be installed?
It is because unlike the iPhone4 and older devices, the 4S is not susceptible to the Limera1n exploit.

That is the difference.

And I agree, if you are not sure about the procedure, one should not post.
Had the OP tried the downgrade with his 4S, he might have ended up in recovery mode from which there is little chance of escape.

That's why - guesses can ruin a phone !
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Old Oct 25, 2012, 02:44 PM   #11
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^^^^^^^^^^ +1
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Old Oct 25, 2012, 07:00 PM   #12
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2+
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Old Oct 26, 2012, 06:30 AM   #13
hypotc
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Thanks for all the answers.

Anyone know if it will be possible soon? Or should I just wait for a untethered jailbreak for iOS6?
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Old Oct 26, 2012, 06:33 AM   #14
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Quote:
Originally Posted by hypotc View Post
Thanks for all the answers.

Anyone know if it will be possible soon? Or should I just wait for a untethered jailbreak for iOS6?
The 4S has been out for over 1 year
No one has found an acceptable boot level exploit.

I do not believe it will ever be possible.
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Old Jan 17, 2013, 07:09 PM   #15
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Quote:
Originally Posted by ristekocevski View Post
to Downgrade iOS 6 to iOS 5 is posible , i find some info how to make this. This service to Downgrade my iPhone is worck wery good.
not possible on a 4S or with the A5 processor. (still)
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Old Jan 17, 2013, 07:36 PM   #16
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Quote:
Originally Posted by dhlizard View Post
No one has found an acceptable boot level exploit.

I do not believe it will ever be possible.
p0sixninja is apparently working on a bootloader exploit for the A5/A6 chips, but, per planetbeing, it would require a ton of work and there doesn't seem to be much interest in it

(http://www.reddit.com/r/jailbreak/co...e_near/c7x9042)
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Old Jan 17, 2013, 08:51 PM   #17
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Quote:
Originally Posted by ristekocevski View Post
to Downgrade iOS 6 to iOS 5 is posible , i find some info how to make this. This service to Downgrade my iPhone is worck wery good.
That doesn't work on A5 and newer chips. Because the iPhone 4S has an A5 chip, it cannot ever be downgraded from iOS 6 to iOS 5.X.
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Old Jan 17, 2013, 10:11 PM   #18
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When the iOS 6 jailbreak is out, you will be able to. But for now you can't.
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Old Jan 18, 2013, 01:59 AM   #19
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Quote:
Originally Posted by viperGTS View Post
When the iOS 6 jailbreak is out, you will be able to. But for now you can't.
That might not be the case, the devs have to find a new workaround for the current downgrade block by apple. On 5.x it took awhile as well before the A5 devices were able to downgrade
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Old Jan 18, 2013, 07:10 AM   #20
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Quote:
Originally Posted by viperGTS View Post
When the iOS 6 jailbreak is out, you will be able to. But for now you can't.
You should read the existing comments on this thread.
TriJetHero is correct.

A jailbreak does not automatically ensure downgrades to non-signed firmware will be possible.
Those are two very different procedures.
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Old Jan 18, 2013, 08:53 AM   #21
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Quote:
Originally Posted by dhlizard View Post
You should read the existing comments on this thread.
TriJetHero is correct.

A jailbreak does not automatically ensure downgrades to non-signed firmware will be possible.
Those are two very different procedures.
You should read the dev team blog.
He is not correct.

http://blog.iphone-dev.org/post/3186.../blob-o-riffic

Quote:
But once you fall off the 5.x train by restoring to 6.x, you’ll be stuck there until the next jailbreak.
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Old Jan 18, 2013, 09:05 AM   #22
TriJetHero
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Quote:
Originally Posted by viperGTS View Post
You should read the dev team blog.
He is not correct.

http://blog.iphone-dev.org/post/3186.../blob-o-riffic
He (I) is..

Asfand Shabbir ‏@iAsfand
@MuscleNerd will we every get around this iOS 6 security? I do have saved 5.1.1 blobs but cant downgrade why?
Expand
1 Nov MuscleNerd ‏@MuscleNerd
@iAsfand if it helps any, there were "no downgrade" issues way back on FW 1.x.x too (no blobs then either!). It's a cat and mouse game.

What @musclenerd means is that you are stuck on 6.X without a jailbreak.
You cannot go back, his remark does not mean the new jailbreak automatically brings a downgrade possibility.


Btw i think dhlizard has read the DevTeam blog…..
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Old Jan 18, 2013, 11:21 AM   #23
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Quote:
Originally Posted by viperGTS View Post
You should read the dev team blog.
He is not correct.

http://blog.iphone-dev.org/post/3186.../blob-o-riffic
I think you misunderstand that statement. It's saying if you are on iOS 6 then you will have to wait until they release it. It never says anything about downgrading.

Jailbreaking and downgrading are two different things. Just like jailbreaking and unlocking.
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Old Jan 18, 2013, 11:40 AM   #24
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Quote:
Originally Posted by gngan View Post
I think you misunderstand that statement. It's saying if you are on iOS 6 then you will have to wait until they release it. It never says anything about downgrading.

Jailbreaking and downgrading are two different things. Just like jailbreaking and unlocking.
This ^^

Sadly, that poster is misunderstanding various comments.

----------

Quote:
Originally Posted by TriJetHero View Post

Btw i think dhlizard has read the DevTeam blog…..
Thanks ! Perhaps that poster should check my signature
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