How to effectively block harassing calls?

If I use a vivo phone, how to set up harassment interception:

1. Enter Settings-(Application and Permission)-(System Application Settings)-Telephone/Information-Harassment Phone/Information Interception/Harassment Interception Rules-Open the corresponding interception options;

2. Go to I Housekeeper-Utilities-Harassment Interception-Telephone Interception/Information Interception-and open the corresponding interception options;

3. Some models have no harassment interception, so you can enter Settings-Set Blacklist in your mobile phone.

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