How to set the SMS password, I forgot.

Forgot your privacy password:

Go to Settings-Fingerprint, Face and Password/Face and Password-Privacy and Application Encryption-Forgot your password, and then reset your password with a secret protection question.

Forget the privacy secret answer:

If you forget the answer to the security question, you can try to reset the password after turning off the privacy password and the screen lock password. If you forget the screen lock password and privacy password, you need to enter Settings-System Management/More Settings-Backup Reset/Restore Factory Settings-Clear all data-Clear immediately-Enter the password according to the prompt, and the device will return to the initial state after the operation. Please back up other important data before operation.

If the above methods are not effective after operation, you can go to official website /vivo Mall APP-My-Online Customer Service or vivo official website Web Edition-Sliding Bottom-Online Customer Service-and enter the manual customer service for consultation and understanding.