Well, That’s a statement that one has to stand behind. Here's why QCONF is the best conference call service for you
Even though Viber feature of group calls is not implemented in the platform, Don't worry. Here a quick, easy and free way to use Viber for your conference calls and group calls
Now you can enjoy the best of both worlds: Initiate a conference call with QCONF and all your contacts in WhatsApp can jump on by way of hyperlink!