Samsung SPH-A920 Phone Manual page 130

"Which Number?" and displays a list of options. You can select an option by
saying it or by using your keypad.
Calling Nicknames
Your Contacts list incorporates a field called "Nickname." When you add a
nickname to a contact, you can say the contact's name or nickname when
using the voice features. For example, if you have a contact, "John Smith"
stored in your Contacts list, and you add, "Dad" to the nickname field, you
can call that contact by saying, "Call John Smith" or by saying "Call
Dad."
Tip: If your Contacts list contains a name that you have difficulty using with
the voice features (such as some unusual or foreign names), you can
add a nickname for that contact that spells out the proper pronunciation
of that name.
Calling Phone Numbers (Digit Dialing)
To voice dial a number that is not stored in your contact list:
Say "Call" followed immediately by a valid string of digits to be dialed,
for example, say "Call 555 555 5555."
Speak naturally and clearly and remember to speak one digit at a time—
1-800 should be pronounced "One Eight Zero Zero."
108 Section 2H: Using Your Phone's Voice Services