The Windows Phone version of Viber has just received a big udpate. It brought a lot of features to the app, most of which were highly anticipated by the Windows Phone users of the free messaging service.
Version 4.0 of Viber for Windows Phone now comes with enhanced push notifications that alert the user with sounds about any incoming messages. Users can also opt to hide the contents of a Live Tile notification, too.
Viber for Windows Phone has also received the useful feature to display additional information about the status of your sent messages. This means that a "Seen" status will be displayed under your message once the recipient reads it. You can also see if the given recipient is online.