Here's a reason: With opal you can transfer and store files at 1/8th the cost of dropbox or mega. More people use storage than Voip. You can crowd fund and donate to crowdfunding platforms with colored coins. Why use vior for calling cards when its more expensive and harder to use than normal voip?
Viorcoin VOIP is not harder to use, did you compared the price? You know all these are already implemented and working not a vaporware like most crypto coins including opal drive etc.
With the vior gateway, you can linked your phone number and call any number from the wallet for cheaper rate than skype. A lot of people on the forum can testify to this.
The upcoming feature will allow users to lease a phone number from viorcoin, which can be used to recieve calls too.
Viorcoin already implemented a functional VOIP network; video, voice, missed calls, history (SMS, local phone number are next on the road map)
The rate of viorcoin users are expected to jump up after the release of the mobile wallet with VOIP and POS wallet.
