iPhone4Down

iPhone 4 downgrade script for Linux (uses ch3rryflower)

• This script uses an older Linux compiled version of ch3rryflower and automates the downgrade process for the iPhone 4
• Linux and macOS are supported by this downgrade script/tool
  • Windows users can create a Linux live USB (see Requirements)
  • macOS users should use cherryflowerJB or powdersn0w instead for more support
• This supports the iPhone 4 GSM (iPhone3,1) only
• iPhone4Down will not and cannot be updated for iPhone3,3 support. Look forward for updates to powdersn0w instead
• The downgrades have the option to jailbreak
• You do NOT need blobs to use this, the script will get the needed 7.1.2 blobs for you
• 8GB models may not work with downgrades below iOS 6
• Newer models may not work with downgrades below iOS 5
• Use an Intel PC/Mac as entering pwnDFU may be a lot more unreliable on AMD devices
• If you want to go back and restore to iOS 7.1.2, you need to disable the exploit
  • From the menu, select "Disable/Enable exploit" > "Disable exploit" while device is in DFU mode
  • If disabling the exploit did not work, try these steps
• iPhone4Down can be also used to restore back to iOS 7.1.2 with the option to jailbreak the install

Supported iOS versions

• This script supports downgrading to any version from iOS 5.0 to 6.1.3
• You are on your own if you attempt to restore to any version above or below this range (except 7.1.2)

Requirements:

• iPhone 4 GSM (iPhone3,1)
• IPSW of iOS 7.1.2 and the version you want to downgrade to (Links in ipsw.me) (ignore the signing statuses in the site)
• A 64-bit Linux install/live USB or a supported macOS version
  • See supported OS versions and Linux distros below
  • A Linux live USB can be easily created with tools like Ventoy

Usage:

1. Download iPhone4Down here and extract the zip archive
2. Plug in your iOS device
3. Open a Terminal window
4. cd to where the extracted files are located, and run ./restore.sh
   • You can also drag restore.sh to the Terminal window and press Enter/Return
5. Select options to be used
6. Follow instructions

Supported OS versions/distros:

• Ubuntu 20.04 and newer, and Ubuntu-based distros like Linux Mint
• Arch Linux and Arch-based distros like EndeavourOS
• Fedora 33 and newer
• Debian 11 Bullseye, Testing and Unstable
• openSUSE Tumbleweed and Leap 15.3
• macOS 10.13 and newer

Tools and other stuff used by this script:

• cURL
• bspatch
• ch3rryflower - dora2ios
• libimobiledevice - libimobiledevice
• libirecovery - libimobiledevice
• imobiledevice-net - libimobiledevice (macOS binaries)
• idevicerestore - LukeZGD fork
• ipsw tool from xpwn - LukeZGD fork
• tsschecker - tihmstar
• partial-zip
• evasi0n
• p0sixspwn
• unthredeh4il