How to set the ringtone of oppoa8?

I want to change my ringtone and my mood today. The method is simple:

1, enter "Settings >"; Sound and vibration >: ringtone, you can select the system ringtone, or click "Select from file" and "Online ringtone" to customize the ringtone.

2. When a dual-card mobile phone is inserted into a dual card, you can select the corresponding SIM to set the ringtone: enter Settings > Sound and Vibration >: select the corresponding SIM card and ringtone to set it.

Tips:

After upgrading to the system version of ColorOS 5.2. 1, _ _ _ _ _