Excuse me, what does it mean to add an exclamation point after the information?

Take a short message as an example. There is an exclamation mark before or after the message, indicating that the short message was not sent successfully and failed to send. You need to click the red exclamation mark and send it again.

Short message service (SMS) is a part of unified communication service plan. Users can directly send or receive text or digital information through mobile phones or other telecommunication terminals. The number of characters that users can receive and send short messages at a time is 160 English, numeric characters or 70 Chinese characters. Short message is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.

The inventor of mobile phone short message is Finnish. Because Nordic people are sensitive and don't like to express by phone, they invented short message on a whim. Someone on the Internet said that the inventor of short messages was American Marty Cooper, who was an employee of Motorola. He invented the mobile phone, not the short message.

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