Altered phone cards?

Anybody heard of this before, or know how it's done? "And "Mr Tanaka" has good reason to be wary. He and his three friends are illegally selling phone cards that have been altered so they can be re-used." http://english.aljazeera.net/NR/exeres/671844D1-95C9-4BEF-903C-155B2E948C59.... -- Harmon Seaver CyberShamanix http://www.cybershamanix.com Hoka hey!