04-17-2014 06:01 PM
Are you in Egypt? I'm not sure but the service could be blocked. Others you know are using it on your carrier? I'm in the US so I am taking my best guess.
The downoad for viber is here: http://appworld.blackberry.com/webstore/content/85
and the 9320 is on the list of supported devices.
04-18-2014 03:31 PM
Are you getting the same error if you try to install it from the link above? Try the link from a computer and scan the barcode.
04-18-2014 04:57 PM