When the Apple 13 video came, the SMS prompt tone was very small.

You can turn up the sound in the settings.

Step 1 Enter setting sound and touch, open the phone setting icon, enter the setting interface, and click the sound and touch options.

When you enter the page, you can solve the problem of low volume by dragging the volume slider to increase the volume under the bell and reminder.

Click the audio/video option to enter the page, just open the right button of single channel audio and telephone noise reduction.