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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 "phone"
Slide your finger downwards starting from the top of the screen.
Press ALL SETTINGS.
Slide your finger left on the screen to find applications.
2. Turn fixed dialling on or off
Press the indicator next to "Fixed Dialling (FDN)" to turn fixed dialling on or off.
Key in your PIN2 and press enter. The default PIN2 is 1111.
3. Return to the home screen
Press the Home key to return to the home screen.