My Card Dialer lication will help you to make international calls using pre-configured various calling card number. How to use Demo in youtube. Steps: 1. Open the app. 2. Click setting icon. 3. Press Add(+) Button to add the card. 4. Select the country and the card. 5. Press sync button to add the selected card. 6. Type the card number(pin number). 7. Press save.