Why does oppo mobile phone always have the sound of water droplets? What is the reminder? Why can't you tell?

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; None of the above methods can solve it. Please back up your phone data (phone numbers, text messages and photos, etc.). ) and restore the factory settings (Settings-More Systems-Restore the factory settings, please do not check "Clear Completely") or brush the machine for processing.