The method of setting a song as a ringtone for incoming calls on an Apple mobile phone is as follows:

Operating environment: iPhone7, iOS13.3.1, Settings version 4.45.

1. Open your phone and click on the settings icon.

2. Enter the settings icon interface and click Sound.

3. Enter the sound interface and select the card number for the incoming call ringtone.

4. Jump to the page, pull the page to the top, and click Customize Ringtone.

5. Enter the custom ringtone interface, select the song on your phone, and click Finish.

6. The page automatically jumps to the sound interface, and you can see that the song you just selected has become the ringtone for incoming calls.