How does Apple's mobile phone prevent sales calls and harassment?

It can be handled in the following ways:

(1) Use the interception software or function that comes with the mobile phone to intercept incoming calls or text messages of the other party's number (with the support of the mobile phone).

(2) Third-party software sets interception, such as mobile guards and 360 security guards.

(3) Unicom users can open anti-harassment reminder service.