What is mobile phone intelligent interception of short messages?

The reason why mobile phones intercept short messages intelligently is because they are judged as spam messages, which may be intercepted by mobile phone system intelligent identification or intercepted by operators. If the website frequently sends short messages, or is marked as a bad number by multiple users, the mobile phone system will intelligently identify and intercept them as spam messages. Operator interception means that the operator recognizes that there are frequent outgoing calls and incoming calls for individual numbers, and will also set interception for that number.