How to Activate or Deactivate Outgoing Caller ID on Samsung Galaxy S2

1. Press Menu
2. Tap Settings
3. Tap Call
4. Tap Additional Settings
5. Select Caller ID
6. Choose one of the following:
    Network Default (Optus Default Setting)
    Show Number (Manually switch Caller ID on)
    Hide Number (Manually switch Caller ID off)
7. Press the Home Button