When you make a phone call, you can either dial a number directly, or you can use the Smart Dial feature to search and call a stored contact or a number from Call History.
When you enter the first few letters of a name, the digits of a phone number, or the contact’s initials, Smart Dial searches for the patterns including characters that appear after a space, dash or underscore. As you enter more letters or numbers, the list shows only the corresponding matches making it easy to find the desired contact quickly.
As you enter digits or letters, the Smart Dial panel displays matches found.
If you want to call a contact but dial another number of this contact, tap the contact card icon at the right of the contact name and choose another number.