How do mobile phones detect spam messages?

1. SMS mode: add the sender's number in front of the content, separate the number from the content with "*" (the basic principles of different provinces are the same), and forward it to10086999;

2. Telephone method: directly dial 10086 to make a complaint, and 10086 will record the content and sending number of the short message you mentioned and submit it to the background for verification. (As you said, this method is recommended when the number is abnormal, but most provinces can't make mistakes in SMS)

Of course, in some provinces, you can call 1 10 to report:

1. Call 1 10 to inform the police officer, and he will tell you to forward the message to the designated number;

2. Just forward it to the designated number according to his request;