Make a Call on WhatsApp 1 Launch WhatsApp from your Home screen or from the app drawer. 2 Tap Calls on the upper left of your screen, or swipe right to view your call log. 3 Tap the phone button at the top right of your screen. It's the little phone receiver with the plus sign. 4 Tap the contact you'd like to call.Tap the red phone button to end the call.Tap the redial button if you'd like to... 5 Tap the red phone button to...