Before attempting to downgrade your iPhone 4S to iOS 5, make sure you:
The most reliable tool in 2026 for this process is the Legacy iOS Kit . It is supported on and macOS and automates many of the complex terminal commands required for older devices. Prerequisites A Mac or Linux PC. A high-quality 30-pin USB-A cable. Go to product viewer dialog for this item. (jailbroken on iOS 9.3.6 is the easiest starting point). The target iOS 5.1.1 IPSW file from IPSW.me . Steps to Downgrade LukeZGD/Legacy-iOS-Kit - GitHub downgrade iphone 4s to ios 5
Follow the prompts to enter DFU mode again, and the computer will force the iPhone to boot into iOS 5. Why Downgrade to iOS 5? iOS 5 is incredibly fast on the A5 chip. Before attempting to downgrade your iPhone 4S to
Download the latest version of Legacy iOS Kit and unzip it. A high-quality 30-pin USB-A cable