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An all-in-one tool to restore/downgrade, save SHSH blobs, and jailbreak legacy iOS devices
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README.md

iOS-OTA-Downgrader

(formerly 32bit-OTA-Downgrader)

Downgrade/restore iOS devices to signed OTA firmwares

  • Please see the "Other notes" section below to serve as answers/solutions for FAQs and issues

Supported devices:

  • iOS 10.3.3 - A7 devices:
    • iPhone 5S
    • iPad Air
    • iPad mini 2 except iPad4,6
    • iPad mini 3 is NOT supported
  • iOS 8.4.1 - 32-bit devices:
    • iPhone 4S
    • iPhone 5
    • iPad 2
    • iPad 3
    • iPad mini 1
    • iPod 5th gen
    • iPhone 5C is NOT Supported
  • iOS 6.1.3:
    • iPhone 4S
    • iPad 2 except iPad2,4

Prerequisites:

  • A supported device in any iOS version:
    • A 32-bit iOS device (jailbreak needed for kloader, checkm8 A5 or ipwndfu can also be used in DFU advanced menu)
    • An A7 device (jailbreak not needed)
  • An IPSW for the version you want to downgrade to (the script can also download it for you)
  • A macOS or a 64-bit Linux install/live USB
    • See supported Linux distros below
    • A live USB can be easily created with tools like balenaEtcher or Rufus)
  • All 32-bit users must install OpenSSH
  • For 32-bit users using Pangu, install the latest Pangu 7.1.x Untether (deb) or latest Pangu 8.0-8.1.x Untether (deb)
  1. Download or git clone this repo
  2. Open Terminal and cd to the directory where the script is located (example: cd /home/user/iOS-OTA-Downgrader)
  3. Run chmod +x restore.sh

How to use:

  1. Plug in your iOS device
  2. Run ./restore.sh
  3. Select option to be used
  4. Follow instructions

Other notes:

  • You do NOT need blobs to use this, the script will get them for you
  • If the restore process does not work for you, try switching USB ports and/or cables
  • This script will verify the IPSW SHA1sum before restoring
  • For users having issues related to missing libraries or tools, re-install dependencies with ./restore.sh Install
  • For A7 devices:
    • Do not use USB-C to lightning cables as this can prevent a successful restore
    • checkm8 ipwndfu is unfortunately pretty unreliable, you may have to try multiple times (for Linux users I recommend trying in a live USB)
    • If the script can't find your device in pwnREC mode or gets stuck, you may have to start over
  • For 32-bit devices:
    • This script does not modify the IPSW
    • To devices with baseband, this script will restore your device with the latest baseband
    • This script has a workaround for the activation error on devices downgrading from iOS 10
    • This script can also be used to just enter kDFU mode for all supported devices
    • This script can also restore your device to other iOS versions with provided SHSH blobs
    • This script can work on virtual machines, but I won't provide support for them

Supported OS versions/distros:

Tools and other stuff used by this script: