It’s easy. If the person you wish to call is an illumy user and you are connected as a Smart Contact, find their name in Contacts, and then click the Voice Call or Video Call buttons. You can also call from within the conversation thread with that person using Voice Call or Video Call buttons. If you want to dial a landline or mobile number, simply navigate to the person’s name in Contacts, or click right the arrow in the Widgets Panel to reveal the dial pad, and start dialing.