- Unicall means a universe call and does not ask for personal information. There is no roaming required for international calls and it is free. - Unicall provides free video calls and chats. You can make video calls easily, as well as three-way calls and broadcast. - Unicall is useful for overseas travel and is used with the Tour World app. You can consult with the tour planner for free local travel information. Tour World provides a contact service through Unicall. - Chat call is an innovati