You can either dial a number directly, or use
Smart dial to quickly place a call.
Smart dial searches and calls a stored/synced contact or a number from your call history.
On the Home screen, tap .
Enter the phone number or first few letters of the contact’s name.
From the list, tap a contact to call.
To choose from other phone numbers associated with the contact, tap
beside the contact name.
Tap the call button that corresponds to the card you want to use.
To hang up, tap