OPPO A78 5G
Turning call waiting on or off
When call waiting is turned on, you can answer a new call without ending your ongoing call.
When call waiting is turned on, you can answer a new call without ending your ongoing call.
Press the call icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press Operator-related settings.
Press Additional settings.
Press the indicator next to "Call Waiting" to turn the function on or off.
Press the Home key to return to the home screen.