The message of 106 was followed by a reply.

Test whether the number user is active. In daily life, mobile phones often receive short messages from 106. Many short messages will tell users at the end that they can unsubscribe by replying to the letter "TD" or "T". The sender adds an unsubscribe reminder at the end of spam messages, not for the convenience of mobile phone users, but to test whether the number users are active. If so, the next wave of spam messages will flood in. SMS: Text or digital information sent or received directly by users through mobile phones or other telecommunication terminals.