How to change the ringtone of ios 10?

After unlocking the phone, click Settings-Sound-Ringtone, and then select the ringtone that comes with the Apple system. Basic Apple mobile phone users use the classic ringtone that comes with the system. The specific steps are as follows.

2. If you want to set the ringtone outside the system, you can use itunes or auxiliary ringtone software. After setting, you can choose your favorite songs as ringtones.