How to prevent spam messages, harassing phone calls and phone fraud?

It is recommended not to trust strange phone calls or text messages, and 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) Report to the operator to which the number belongs.

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