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How to cancel the SMS ringtone set on OPPO mobile phone?

Mobile phone model: OPPO R 1 1

1. Turn on the phone, find the setting options on the phone's main screen, and click Enter.

2. In the setting interface, find the options of sound and vibration, and click Enter.

3. In the sound and vibration interface, find the information ringtone option and click Enter.

4. In the information ringtone interface, you can see many system ringtones, just choose one you need.