What is Zoptax and what problem it solves? Zoptax is truly decetralized VOIP application which provide complete security for its user when they are connected to each other using Zoptax Network. Becuase of blockchain there is no possiblity of centralized authorities to intercept between a connection. First live version of zoptax app is also available on Google Play Store. https://play.google.com/store/apps/details?id=com.zoptax&hl=en Zoptax Coin will be used to make calls and the coins will be rewarded/paid to the node holders running Zoptax Bone (VOIP Algorithm) as a network fee.