Swipe to the right on the main panel to access a panel for your Contact shortcuts and call history access.
Tap one of the 12 shortcuts, then tap the contact you want to set. Tap a shortcut's Call icon to call its number. Tap a shortcut's image to select Make voice call, Make video call, Send message, or Remove shortcut.
Tap Call logs to open the Phone app with the Recent tab displayed. It lists all of your recent calls. You can change tabs to access other Phone app information.