How does oppo r9 set the notification ringtone?

OPPO R9 setting system ringtone method:

1. First, we find the setting options in the mobile phone, click Settings, and open the setting options first.

2. Find the sound and vibration options on the phone interface, and click Enter.

3. Find the ringtone option on the mobile phone page, and we click the ringtone again.

4. Find the ringtone you want to set, and then select the ringtone you want to set, and the ringtone will be set.