[header] How to use viber [title] Install viber on your mobile device. [step] Once viber has been downloaded, tapping on the app will begin the setup process. Input your device's telephone number and grant access to your contact list, then you'll be sent a text message with an access code. 
[title] Input the access code you receive via text message. [step] You're all set up! Now you'll see a number of options at the bottom of the app including messages, recents, contacts and keypad.