World telecommunication development report 1998

World telecommunication development report 1998

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Prepaid cards are used like standard telephone cards, until there is no money left . With prepaid mobile cellular cards, however, the user installs the card into the handset and is assigned a phone number to receive calls. These services offeranbsp;...


Title:World telecommunication development report 1998
Author:International Telecommunication Union
Publisher: - 1998
ISBN-13:

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