Download tango for Windows Desktop. All PC versions: Windows 8, Windows 7, Vista, XP operaring system. Viber for Windows OS lets you send free messages and make free calls to other Viber users, on any device and network, in any country! Viber for Windows syncs your contacts, messages and call history with your mobile device. Some features for Desktop versions are: Best-quality HD voice calls, Video calls, Text & photo & stickers, Full sync between Mobile-Windows and Transfer ongoing calls between devices. The fisrt step is download Viber, second step is enter your phone number and last step is start connecting with your friends. Easy!