1. Enter "Settings-Sound" and drag the "Ringtone and Reminder" slider to turn up the volume;

Second, if you can hear the sound of the speaker, it means that the speaker is working normally; If you can't hear the speaker sound, please contact Apple after sales;

3. Determine whether the ring/mute switch is set to ring; If you see orange, it has been set to mute;

Fourth, restart the equipment;

5. Open an app with music or sound effects, and use the volume button or slider in the control center to adjust the volume;

6. Enter "Settings-Bluetooth" and then turn off "Bluetooth";

7. If there is still no sound, please connect headphones. If you can hear sound through headphones, unplug the headphones, and then remove any dust or debris from the headphone jack of the device;

8. If the equipment is in the protective sleeve, please ensure that the protective sleeve will not block the speaker;

Nine, use a brush to gently remove any debris from the speaker and Lightning interface (or 30-pin base interface). Brush should be clean and dry, with soft hair;

X update your device to the latest version of iOS.