How to turn on lgv30hifi: Plug in the original earphone of the mobile phone, enter Settings-Sound-hifi-turn on the HiFi function switch of qq music player, and the HiFi sound effect will only take effect in earphone mode.

The method of starting the game HiFi: Go to the mobile phone-game box-game sound quality and sound effect-HiFi settings to start the game HIFI corresponding software.