How to completely hack the other party's number so that the message he sent can't be received.

Take OPPOr9s as an example, you can blacklist the phone number of the other party, as follows:

First, turn on the phone, find "Settings" and click to enter;

Second, find the "phone" and click to enter;

Third, find "harassment interception" and click enter;

Fourth, find the "blacklist" and click to enter;

5. After entering the blacklist page, click the "+"sign at the bottom;

6. Select the contact to block, and click "OK" to completely block the contact.