Older devices—specifically those with the A11 Bionic chip or older (iPhone 5S through iPhone X)—have a permanent, unpatchable hardware vulnerability known as the checkm8 exploit. This allows tools to manipulate the bootloader regardless of the iOS version.
Understanding why this happens is the first step toward finding a working solution. Why iRemove Tools Shows "Device Not Supported" iremove tools sorry your device is not supported
The most common culprit is your device's processor. Apple completely changed its security architecture starting with the . Older devices—specifically those with the A11 Bionic chip