How does Apple change the custom ringtone? Ask for recommendation.

1. Select the open setting option on the mobile phone, as shown in the figure below. Here, take Apple's iOS mobile phone: 12.4. 1 as an example.

2. On the phone settings page, select the option to open the sound menu, as shown in the figure below.

3. Enter the sound setting page, and select the option to open the ringtone menu, as shown in the figure below.

4. Enter the ringtone setting page, and select the added custom ringtone option in the ringtone list, as shown in the figure below. Complete the renderings.