What it means is, Viber is the closest, and I'll say that again, the closest alternative to Skype that I can see. Simple as that.
It's a simple download, across different device platforms, and is a one stop shop like Skype.
Viber has all the features of Skype. Free voice and video call, pre paid credit / minutes that do not expire, single country unlimited subscriptions, and multiple country unlimited subscriptions.
I did not say Viber was the cheapest. I said it was the closest to Skype that I could find. If you know of something closer, please post it, but it's not MyTello.
MyTello does not offer unlimited subscriptions, and does not offer free voice and video. Many members like to see their kids and grand kids. Not to mention, their calls to Australia are expensive when compared to other providers.