iPhone 5S Home Button and Flex Cable with Fingerprint Sensor Black The iPhone 5S features a home button with fingerprint sensor. If your home button is broken, this is the part that needs to be replaced. Here is the How To Guide for this part The original Touch ID sensor cable in an iPhone 5S is tied to the unique logic board inside the phone. Replacing this part will only restore the home button functions of the device, not the fingerprint reader.