The sound of Apple's mobile phone suddenly became very loud.

Excuse me, do you want to ask the reason why the sound of Apple's mobile phone suddenly becomes very loud? The reason for this is the following：

1. System setting problem: Some system settings, such as zoom function and font size setting, are accidentally triggered, which will lead to louder sound. You can make corresponding adjustments on the settings page.

2. Hardware problem: the device has a ringtone and a mute switch. Please make sure it is set to the ringtone position. When the horn rings, make sure that the protective shell does not block the horn, and go to Settings >; Sound, drag the slider to the maximum volume. There is no sound from the speaker, please contact Apple technical support.