Samsung SPH-M520ZSAQST - Manual (Page 156)

130 Section 2H: Using Your Phone’s Voice Services
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.