For many years, the security of the phone depended only on the password, but due to changing technology, even the toughest passwords are being hacked easily. Therefore, smartphone manufacturers have converted traditional passwords into biometric passwords, such as fingerprint scanners, facial recognition, iris scanners, voice recognition, etc. PINs and passwords come in nonbiometric on the phone. If you have enabled these security features in the phone, then no one can use your phone without your permission.

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Voice recognition
'Voice recognition' is also known as speech recognition. This feature takes the words spoken by the person as input and works on it by converting those words into digital form. This feature identifies a person only under these words. This technique is used to run mobile phones, give commands and search through voice. It does not require pressing the keyboard buttons. Voice recognition has to go through many complex stages. Vibration is produced when something is called, which is called analog signals. ADC Translator is used to convert this analog web to mobile and computer digital. It divides the sound into small samples and normalizes the sound to bring the voice to a consistent level, as not every person can speak at the same speed.

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Facial recognition
With the help of this, the user can unlock the smartphone by looking at it. That is why people like this feature as well. If you use social media, then you will know how Facebook offers the option to tag photos based on your friends' faces. That too is a kind of facial recognition. The Facial Recognition System is a mobile feature that can verify a person as a digital image and digitally match the user's face with the 3D picture of the feed subscriber in the Facial Feature Database. It is usually used in security systems. If the facial recognition system in the smartphone misfeeds the identity of a person, then there can be a lot of problems. Face recognition is now available in most smartphones, currently, the facial recognition of premium phones like the iPhone is accurate. The iPhone guides you to rotate your face while registering your face in iPhone X's Face ID so that it can 3D scan your face.

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