Mobile and web-based apps utilize phone number and SMS verification to confirm the authenticity of users. These services send a code or password by SMS to the user's mobile and they need to enter on the site or application to verify their identity. Phone number and SMS verification will help stop fraud, spam, and abuse through online platforms by verifying that the user is a real person with a valid phone number. Many websites and mobile applications require verification of SMS and the phone number to prove that users are legitimate. This is done to safeguard their platforms.