What is it Cooee or Callcooee is an eSim application helps expatriates and digital nomads around the world to buy and use local phone numbers from multiple countries without a Sim Card (including Australia, United Kingdom, United States and Canada and more). It also includes travel data and international calling credits which make it the ultimate app for anyone on the go who needs to stay connected. Why Cooee Cooee numbers can be used to call, text and roam from anywhere in the world. This includes receiving all your SMS OTPs from banks and subscription services which make Cooee an extremely convenient and affordable solution for freelancers and digital nomads.