What is a biometric authentication method that is most frequently used with mobile devices?

The identification of a user's physical characteristic, such as a fingerprint or palmprint, is required for biometric authentication. Your fingerprint is frequently used by mobile devices to verify your identity. Most modern laptops can also recognize you by scanning your face. Although DNA and retina scanners are regarded as a type of biometric authentication, they are not frequently employed with mobile devices today. You don't want your phone to collect your blood or saliva to authenticate you. Although DNA and facial scans aren't yet covered by the CompTIA A+ objectives, palmprint, fingerprint, and retina scanners are. A swipe lock is not a type of biometrics.