Sony Xperia XZ3
Turning your own caller identification on or off
You can turn off your own caller identification, your number will then not be shown at the receiving end when you make a call. Your number is only hidden when you make voice calls not when you send messages.
Press Phone.
Press the menu icon.
Press Settings.
Press Calls.
Press Additional settings.
Press Caller ID.
Press Show number to turn on caller identification.
Press Hide number to turn off caller identification.
Press the Home key to return to the home screen.