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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 Dialling Numbers"
Press the phone icon.
Press the menu icon.
Press Fixed Dialling Numbers.
2. Turn fixed dialling on or off
Press Enable FDN to turn on fixed dialling.
Press Disable FDN to turn off fixed dialling.
Key in your PIN2 and press OK. The default PIN2 is 1111.
3. Return to the home screen
Press the Home key to return to the home screen.