Name a VoIP application besides Skype and share your opinion

Name a VoIP application (besides Skype) and share your opinion on any security or privacy issues you discover with the application.

Solution

Jio from Reliance Telecommunication is offering a secured and dedicated VoIP to its customers. It offers a private channel which is not being shared, and through which they are providing a high quality calling service, and is restricted to be shared only by those network users. And this VoIP is extended as VoLTE network.