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(Please read the whole question before flaming me)

Today I updated my iPhone 4S (Model A1387) to iOS 9.0.1 from 8.4. Since the Wifi doesn't work with either of these versions I decided to downgrade the software to iOS 7.1.2.

After I downloaded myself a IPSW-File for the iPhone 4S and tried to [Shift]+Update my phone in iTunes I received the error code 3194. After a quick web search I booted the iPhone into recovery mode and tried it again. After that I tried adapting my hosts file in Windows as showed on apples support page. This also didn't work. I also tried downloading the I P S W-File from different providers and also tried to use a third party tool called "The Firmware Umbrella". Then I found out, that recovery mode is not enough and I have to go in DFU mode.

Since the black screen is an indicator of the DFU mode I was sure that it will work this time, since the DFU mode seems to be some kind of ultimate firmware override mode, but after hours of effort I'm still stuck with iOS 9 and nothing has worked out to bring me back to iOS 7.1.2.

So as the title states: How can I downgrade my iPhone 4S to iOS 7.1.2?
(As I am going to jailbreak this device afterwards, you can also show a direct way to load a jailbreaked firmware)

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3 Answers 3

Reset to default
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You cannot downgrade to anything less than 8.4.1 now. Apple signs iOS software, they currently only sign 8.4.1-9.0.1. This means that you can't downgrade to 7.1.2.

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  • 2
    That sounds like a nice way to push old devices off the market to sell newer models -.- how about jailbreak-downgrade?
    – LostPhysx
    Commented Sep 28, 2015 at 13:29
  • 6
    @Paedow nope, jailbreak can't fix this. Apple doesn't allow downgrading because they want to keep people on the latest software, which fixes bugs, promotes their latest software, etc.
    – At0micMutex
    Commented Sep 28, 2015 at 14:24
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Only way you can do this is if you have already saved SHSH blobs from the time when iOS 7.1.2 was current. You can no longer get them, nor can you use someone else's (as they are unique to the device). So unless you already have these blobs you cannot downgrade

More info

Apple signs iOS software and whenever you upgrade or restore, iTunes will first ask Apple servers if the upgrade is valid. At the moment (27th September 2015) only 8.4.1 and above are being signed. This means the only way to go lower is to sign the restore file (IPSW) yourself and this can only be find using valid SHSH blobs

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-3

you can downgrade to ios 6.1.3 without blobs

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  • 4
    Can you please explain in more details how this would work?
    – nohillside ♦
    Commented Oct 31, 2015 at 7:27
  • According to this Reddit thread, it's possible to download iPhone 4S to use 6.1.3. I didn't test it yet, but I'm going to, because iOS 9.2 performance on iPhone 4S is really horrible.
    – Denis Malinovsky
    Commented Feb 6, 2016 at 22:04

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