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When fixed dialling is turned on, you can only call selected numbers and do emergency calls. Incoming calls aren't affected.
1. Find "Fixed dialing mode"
Press the Left selection key.
Select Call settings.
Select Fixed dial number.
Select Fixed dialing mode.
2. Turn fixed dialling on or off
Key in your PIN2 and press the Left selection key. The default PIN2 is 1111.
3. Return to the home screen
Press the Home key to return to the home screen.