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HTC One M9
Back to Calls & contacts
Activate or deactivate fixed dialling
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 Numbers"
Slide your finger down the display starting from the top edge of your mobile phone.
Press the settings icon.
Press the settings icon.
Press Call.
Press Fixed Dialing Numbers.
2. Activate or deactivate fixed dialling
Press Enable FDN or Disable FDN (depending on the current setting).
Key in your PIN2 and press OK.
3. Return to the Home screen
Press the home icon to end the session and return to the Home screen.