Where is the SMS blacklist set?

Take the iPhone 6 mobile phone as an example, the setting method is as follows:

First turn on the phone, find the "Settings" item on the desktop, and click Enter.

Second, after entering the settings, find the "information" item and click Enter.

Third, after entering the information, find the "blacklist" and click Enter.

Four, after entering the blacklist, find the "new", click enter.

5. Check the contacts to be blacklisted in the future.