OPPO's mobile phone was hacked by the other party. I sent him a short message. How can he get to know each other?

1, ColorOS 7 and above: "Settings >; Security > harassment interception "Click the blacklist, you can select the number you want to intercept from the address book, or you can enter it manually.

2.Coloros versions 3.0 to 6.2: "Settings >; (system application) > telephone > harassment interception > blacklist "to add or delete blacklisted contacts;

Precautions:

After adding, you will not receive calls and messages from blacklisted numbers.

This answer applies to all OPPO models.