OPPO A57 4G
Android 12.0
1. Find "My number"
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press Advanced settings.
Press Additional settings.
Press the required SIM.
Press My number.
2. Turn your own caller identification on or off
Press Show number to turn on caller identification.
Press Hide number to turn off caller identification.
3. Return to the home screen
Press the Home key to return to the home screen.