Hi all,
I'm excited to announce the Viber 2.1.3 is finally available for download on Market.
First and foremost, this new version is compatible with ICS (Android 4) - so the long anticipation is finally over

In addition, the new version contains bug fixes and small new features for your convenience.

Please try it out and let us know if you encounter any special problems.

Best regards,
the Viber Team

@ratedrkoman -
We got a similar report from another user from Sri Lanka. Please try registering with a different number in order to see if this is a specific problem, and if it still doesn't work, please contact your provider and see what they have to say about it.

@CuriOu5 -
If both sides have the latest version of Viber installed, this message should not appear. The reason for this message is the fact that 2 different voice engines are installed on old-new versions, and sometimes they can't communicate with each other.

@lowlock -
Viber only provides service between 2 Viber users that are connected to the internet. In any other case, the call is simply switched to be a regular, cellular call.