What if the short message is too long and becomes a multimedia message?

If the short message is too long, it will become a multimedia message, which can be sent through third-party software. If the user's mobile phone does not provide the function of preventing short messages from being converted into multimedia messages, or the user wants to send long messages by using the short message application that comes with the mobile phone, you can consider using third-party software to send long messages. These softwares often allow users to choose "plain text" format when sending short messages to avoid automatic conversion to MMS messages, which is called ShortMessageService, or SMS for short. It is a service that allows users to send or receive text or digital information directly through mobile phones or other telecommunication terminals. The number of characters sent and received each time is limited. Users can send and receive 160 English or numeric characters or 70 Chinese characters.