If you’ve got a iPhone 5S with a broken touch ID button or flex cable, you’re pretty much stuck! The iPhone 5S touch ID and motherboard are linked specifically to each other and there is no way to swap out the touch ID and still have the fingerprint sensors work.
Don’t ever attempt to change the iPhone 5S home button from the flex cable. The sensor is glued to the sapphire with very strong adhesive. Disassembling the button from the chip will cause irreversible damage. The electronic components will be different if you attempt to connect another button to the touch ID flex and will not function. You can’t recalibrate the sensor and it will never read fingerprints again. It will however function as a home button.
Source: http://www.iphonefixes.com/iphone-5s-tou...