OPPO A78 5G
Select ring tone
You can select the ring tone you want to hear when you get a call.
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Sound & vibration.
Press Ringtone.
Press the required ring tones to hear them.
Once you've found a ring tone you like, press the Return key.
To use a different ring tone than the default ones, press On this device and follow the instructions on the screen to select the required ring tone.
Press the Home key to return to the home screen.
1. 1. Find "Ringtone"
2. 2. Select ring tone
3. 3. Return to the home screen