Oppo r9sk has turned off all prompts. Why is there a tinkling sound? Sleeping is annoying. Open the screen.

Hello; There may be the following situations when the mobile phone suddenly appears a prompt tone:

1, software tips, such as QQ, WeChat, third-party software advertisements or information tips, it is recommended to turn off the tips in the corresponding software;

2. The system prompts to open. For example, some unknown program software will automatically send out hints. It is recommended to turn off the system volume in Settings-Sound-Volume.

3, some spam messages or verification code information, games and other media push messages and file transfers. It is suggested to turn off the volume of music, video, games and other media in Settings-Sound-Volume.

4. If you are not sure what causes the prompt sound, it is recommended to choose complete mute in the setting-sound-mute mode;