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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 "settings"
Press the phone icon.
Press the dots in the bottom right corner of the display.
2. Turn fixed dialling on or off
Press the indicator next to "Fixed Dialling (FDN)" to turn the function on or off.
Key in your PIN2 and press enter.
3. Return to the home screen
Press the home icon to return to the home screen.