How to prevent advertising SMS harassment?

Hello, telecom users can open anti-harassment service, and China Telecom's Tianyi anti-harassment service can be opened directly through Tianyi anti-harassment WeChat official account, as follows:

1. Users search for Tianyi anti-harassment WeChat official account

2. After paying attention, they will receive a reply message, and then click "Click here to log in and open Tianyi anti-harassment" to fill in the information according to the guidance. 3. After submitting the information, Tianyi anti-harassment can be successfully opened.