Select (or your preferred iOS 5 sub-version) from the list.
The most reliable, modern method to achieve a true untethered downgrade on an iPhone 4s is using , an open-source script that automates the exploit process. Step 1: Put Your iPhone 4s into DFU Mode
If you find the command-line interface intimidating, or if you still want access to iOS 9 features, you can use . This is an app installed via jailbreak that allows your phone to hold two operating systems at once.
Select your destination iOS 5.1.1 IPSW file within the utility interface. The program will execute the kloader exploit over your local network network, put the device into a temporary pwned restore environment, and push the iOS 5 files directly into the system partitions. Post-Downgrade Optimization and App Selection downgrade iphone 4s to ios 5
: If your iPhone 4s was upgraded to iOS 5 using an Over-The-Air (OTA) update , these downgrade methods may not work.
Use a tool like Phœnix to jailbreak your iPhone 4s on its current iOS 9 firmware. Open Cydia once the jailbreak is complete. Step 2: Install CoolBooter In Cydia, go to the tab.
This uses (Windows) or shsh.host tools (Mac) to stitch blobs into a custom IPSW. Select (or your preferred iOS 5 sub-version) from the list
Open the kDFU app on your iPhone screen. Select "iOS 5" as your target firmware and trigger the exploit. Your device screen will turn completely black, indicating it has successfully entered pwned DFU (kDFU) mode. Step 4: Run the Downgrade Script
If you have an iPhone 4s already on iOS 6 or 7 (and jailbroken), you don’t need to downgrade permanently. lets you dual-boot iOS 5 alongside your main OS.
If you perform a full restore (Method 1), you may encounter an activation error due to Apple's legacy activation servers changing over time. If the phone refuses to bypass the setup screen: This is an app installed via jailbreak that
Method 1: The Legacy OTA Trick & Legacy iOS Kit (Recommended)
Older web browsers struggle with modern security certificates. Install the Let's Encrypt ISRG Root X1 certificate via Safari to prevent "Cannot Verify Server Identity" errors on websites.
No tethered issues. Drawback: Slower storage performance.
Downgrading wipes all data from your device. Take the following preparatory steps to ensure a smooth installation:
To execute the downgrade scripts, your iPhone 4s must currently be jailbroken on iOS 9.3.5 or 9.3.6 so it can enter kDFU mode.