You may require an overseas calling card for a variety of reasons. One may claim that international calls can be made online with an app like WhatsApp. However, you should note that a stable and dependable internet connection is required for WhatsApp calls. Since your prepaid or postpaid plan does not include mobile data when abroad, you will need to make use of a public Wi-Fi network.You must maintain frequent communication with your colleagues and clients when in India on a business trip. Having access to international calling cards is quite useful in such situations. As an added bonus, having a calling card is really useful whether you're exploring the beautiful European Alps or the exciting New York City nightlife. As a result, you can keep in touch with your family and friends back at home. You are free to contact them anytime to inform them of your location.Because of this, an international calling card is an absolute must-have.