From a Home screen, tap the Phone icon (lower-left).
If not available, swipe up or down from the center of the display then tap Phone .
From the Contacts tab (lower-right), tap the Menu icon (upper-right).
Tap Speed dial numbers.
From the Name or number field, enter the name or number of the desired contact then select it in the dropdown menu.
As the name or number is entered, a list of matching contacts may appear and can be selected at any time.
To change the speed dial number, tap the Dropdown menu icon located to the left of the field then select the desired number (e.g., 3, 4, 10, etc.).