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https://www.telecompaper.com/news/st-cuts-international-calling-card-prices--33294
ST CUTS INTERNATIONAL CALLING-CARD PRICES - Telecompaper
Singapore Telecom (ST) has cut the prices of its international calling card service, a service which provides one access number for customers who travel...
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https://www.airtel.in/blog/prepaid/what-is-international-calling-card-and-how-it-works/
What is an International Calling Card & How it Works?
Jul 27, 2023 - Call an international phone number using international calling cards. Read on to know more Airtel's International plans.
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