Open Viber on your Android. It’s the purple speech bubble icon with a phone inside. You’ll usually find it on the home screen or in the app drawer. Tap CONTACTS. It’s at the top of the screen. Tap a contact to call. Tap Free Call. It’s the first purple button. Viber will now place an outbound call to the selected contact. Open Viber on your Android. It’s the purple speech bubble icon with a phone inside. You’ll usually find it on the home screen or in the app drawer. Use this method if you’re not already connected with the Viber user but you have their phone number. Tap CALLS. It’s at the top of the screen. Tap the dial pad icon. It’s the blue circle with white dots at the bottom of the screen. Enter the Viber user’s international phone number. Be sure to enter the country code, area code, and/or any other details as necessary for international phone calls. Tap the call icon. It’s a green circle with a white phone receiver inside. Viber will now place an outbound call to this phone number.