Primary number
The first number stored with a name is designated as the "primary number,"
and is the number dialed when pressing and holding the roller on the
selected name/phone book entry.
If you have multiple numbers stored in a phone book entry, you can
designate any of the other numbers as the primary number:
1. From the Start screen, press the roller. Scroll to the phone book entry
you want to edit, and press the roller.
2. Highlight the number you wish to designate as the primary number
and press the roller.
3. Scroll to Set as primary no. and press the roller.
Note: The primary number is always the first number displayed when
viewing the details of a phone book entry.