Setting a speed dial slot for a frequently called contact on your BlackBerry is easy (easier than remembering which person has which speed dial number, Ugh!). Here’s How:
Select “Address Book”.
Scroll and select a contact (See “Note” at the bottom for a quicker way to select a contact).
Press the BlackBerry menu button.
Scroll and select “Add Speed Dial”.
Choose a number to associate with that contact.