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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 "Send my caller identity"
Press the Navigation key.
Select Call settings.
Select Send my caller identity.
2. Turn your own caller identification on or off
Select On to turn on caller identification.
Select Off to turn off caller identification.
3. Return to the home screen
Press the Home key to return to the home screen.
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