Welcome to the Official BlackBerry Support Community Forums. This is your resource to discuss support topics with your peers, and learn from each other. New to the forum? Please visit the ‘Getting Started’ link below.
We tried our best to incorporate our call service on OS6, but it was unfortunately impossible. We wouldn't want to get into the smallest technical details, but as you can probably understand, it was also a great interest of us to bring our calls to all OS version out there. We will still be examining new ways to do that, and if we have news we'll let you know.
An official representative from Viber Media (Viber app.)