The personal identification number (or password) is the most tried-and-true and simplest form of local security. Android’s face unlock feature falls back on a PIN or other form of locking should the software fail to recognize the user’s face in question. Apple’s iPhone 5S fingerprint scanner is a new feature that was added to Apple’s latest flagship smartphone. The odds of a fingerprint other than the one that was originally enrolled successfully unlocking the phone are 1 in 50,000, according to Apple.”]
Source: https://www.csoonline.com/article/2134185/using-local-security-to-lock-down-your-mobile-device.html