Nokia Lumia 520
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.
1. Find "settings"
- Press the phone icon.
- Press the dots in the bottom right corner of the display.
- Press settings.
- Press the field below "Show my caller ID to".
- Press everyone, no one or my contacts.
- Press to return to the home screen.