How to resume the blacklist SMS interception when it expires?

Blacklist SMS blocking expired, add recovery again. According to the public information related to the investigation, after the blacklist information expires, you only need to add the number again to resume interception. The word blacklist comes from world-renowned universities such as Oxford and Cambridge in Britain. At the beginning of the Middle Ages, these schools stipulated that students who misbehaved should record their names and behaviors on the black book, and whose name was on the black book.