The iPhone 5S could come with a sapphire crystal capacitive touch home button that incorporates a new fingerprint sensor, according to supply chain sources in Taiwan.
Apple is expected to do away with the traditional physical home button, which has long been one of the most unreliable components on iOS devices. It’s thought that using sapphire crystal, which has a hardness second only to diamond, will prevent the button from getting scratched and ruining the fingerprint sensor.