Limit the phone numbers that you can call
When you set up and use fixed dialing numbers, you can only make calls and send text messages to the phone numbers
that you added to the fixed dialing numbers list. For example, if you give your BlackBerry device to your child to use, you
can limit the phone numbers that your child can call. To use fixed dialing numbers, your service provider must set up your
SIM card for this feature. Depending on your wireless service provider, this feature might not be supported.
In the Phone app, swipe down from the top of the screen.
> Fixed Dialing Numbers.
Turn on the Fixed Dialing Numbers switch.
Enter the SIM security code provided to you by your service provider.
Tap Edit List.
Type a name and phone number.