OPPO A57s
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 SIM.
Press On this device.
Press the required ring tones to hear them.
Once you've found a ring tone you like, press the Return key.
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
