Viber announces HD voice-support exclusively for Nokia Lumia Windows Phones | Windows Central
T-Mobile introduces first Nokia Windows Phone in US
Viber - Viber for Nokia Windows Phone with voice is now LIVE. Currently, on Nokia Lumia devices only. This is a separate application from the previous Viber for Windows Phone that was
Viber for Windows Phone - Download Viber Free
Viber for Windows Phone 8 gets a fresh UI, better integration with Viber Desktop | Engadget
Viber install to Nokia Lumia 520 - YouTube
Viber Launches Free Calling App For Windows Phone 8