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Phone cards help people to talk to their friends/relatives who live in other part of the world. With the advent of VOIP technology it is now possible to talk to a person residing in the other part of the world at a much cheaper and affordable rate. Many sites such as comfi.com have sprung up which providing different international calling cards including at&t calling cards, Australia call card etc. One can even use these prepaid phone cards to send SMS messages to their dear ones who live far away. Besides VoIP, web-call, sms-call, pc-to-phone too is also available.