How to send text messages to people nearby?

Sending text messages to people nearby requires downloading special software, but it is risky.

According to the telecom regulations, mass SMS is a value-added communication service, so a value-added telecom business license should be obtained before mass SMS.

No organization or individual may engage in communication business activities without obtaining a communication business license and filing it.

Therefore, it is illegal to send short messages in groups without relevant qualifications.