How to unblock SMS in mobile phone settings?

If you use a vivo phone, it means that harassment interception is turned off:

Method 1: enter I housekeeper-utility-harassment interception-telephone interception/information interception-turn off all interception options;

Method 2: Enter Settings-(Application and Permission)-(System Application Settings)-Telephone/Information-Disturbing Telephone/Information Interception-Turn off all interception options set.

If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.