How is it that there is no sound in mobile phone information?

Common reasons why there is no sound in mobile phone information are as follows:

1. phone mute: turn on mute mode in phone settings. This makes the mobile phone not send out a prompt tone when receiving messages.

2. Sound setting problem: The sound setting may be changed unexpectedly. For example, the ringtone volume can be turned down, or "mute" mode can be enabled.

3. Software problem: If the message prompt tone is sent through a third-party application, it may be a software problem. In this case, reinstalling the application may solve the problem.

4. Hardware problems: If your mobile phone has hardware problems, such as damaged or loose speakers, it may lead to the problem of no sound.