Phone number and SMS verification can be used to verify the identity of a user through the confirmation of their phone number. The process involves sending a verification code via SMS to the user's phone number. They are then required to enter into a verification form to verify that they're responsible for the phone number. In order to prevent fraudulent transactions and ensure the authenticity of users using SMS verification, telephone numbers are frequently used in online registrations. This is a great option to create confidence between businesses, users and websites. Also, it helps to protect against account takeovers as well as various other types of fraud.