Open the plist file and edit the following values to trick Apple's update server: Change ProductVersion to 5.0 Change ProductBuildVersion to 9A334 Save the file and reboot your iPhone.

Downgrading your iPhone 4S to iOS 5 is a relatively straightforward process, but it does require some technical expertise. If you're experiencing performance issues or simply prefer the simplicity of iOS 5, following these steps can help you achieve your goal. Remember to always backup your data and exercise caution when modifying your device.

iTunes will now restore your iPhone 4S to iOS 5. This process may take several minutes. Do not disconnect your device until the process is complete.

⭐⭐⭐☆☆ (3/5) Target Audience: Enthusiasts, collectors, retro-app experimenters, offline nostalgia seekers. Not for: Daily driver usage, app compatibility, security, or the faint of heart.

Use a computer running macOS or a Linux distribution (Ubuntu is highly recommended). Windows users can use a live Linux USB boot drive. Install (on Mac) to easily manage dependencies.

If you are on macOS, ensure you have Homebrew installed, then open Terminal. Clone the Legacy iOS Kit repository: