Calling Cards and Phone Cards
Calling Cards, Phone Cards, Prepaid Calling Cards, International Phone Cards or Calling Cards are all refer to the same prepaid method of making long-distance or international calls. Typically customers purchase calling card as prepaid block of calling time, which could be used for calls to different countries with different rates. Calling Cards have many advantages comparable with all other calling plans. Calling Cards could be used from any phone, they do not incur unexpected telephone bills, but most importantly calling cards offers much better rates than any other long distance providers. The reason is that customer do not have contract with calling card or calling card provider. If customer is not fully satisfied, he or she may look aground for a better deal. Regular calling or long distance provider locks the customers and prevent from shopping around for a better deal.
Source: Calling Cards and Phone Cards