2. Since it is an anonymous short message, as long as you don't know your real name, you can use someone else's mobile phone to send out the obscure information you need to express.
3. Some websites support the function of sending short messages for free. For example, Q coins in QQ can be used to send short messages, so as long as you register a QQ number, you can send anonymous short messages. And Baidu sometimes provides the function of sending short messages, such as on Mother's Day.
4. Using the IP phone on the network allows you to make up your own fake number at will when sending.