Joke Collection Website - Public benefit messages - I was slandered by a short message. How can I know who this person is?

I was slandered by a short message. How can I know who this person is?

Don't delete messages. Keep the report as evidence for police investigation. The police will definitely ask you. Tell them the person you suspect (that is, the suspect) and they will file a case for investigation. The police can easily find this through the telecom company. Should there be a blacklist function on the mobile phone? Just use this number as a text message to refuse.