How does vivo mobile phone intercept short messages with blacklisted numbers?

Step 1: Go to the desktop of vivoz3 mobile phone and click Settings.

Step 2: Click on information and click on harassment interception.

Step 3: Click the blacklist and click Add.

Step 4: You can select the nearest contact or add it manually.

Step 5: Enter the phone number and name of the contact you want to block, and then click Finish.