Joke Collection Website - Public benefit messages - The media volume of my OPPO A57 phone and the volume in the settings are turned on, but there is still no sound on the phone?

The media volume of my OPPO A57 phone and the volume in the settings are turned on, but there is still no sound on the phone?

If the phone has a sound or something, it must be a setup problem.

See if the corresponding permissions are enabled in the settings of mobile phone-privacy authorization.

If it is still silent, please back up the data and restore the factory settings of the mobile phone (Settings-System "More"-Restore the factory settings, please do not check "Clear Completely") or try to upgrade to the latest version.