From a Home screen, tap Phone (located in the lower-left). If not available, navigate Apps > Phone.
From the Dial tab, enter a 10-digit number then tap the Phone icon (located in the lower-left). To place a call from the Contacts list, tap the Contacts tab then tap the appropriate number from the corresponding contact.
Once the call has connected, tap Add call (located in the lower-left).
From the Dial tab, enter a 10-digit number then tap the Phone icon. To place a call from the Contacts list, tap the Contacts tab (located in the upper-right), then tap the appropriate number from the corresponding contact.