Read the fine print of the calling card, they often charge for units, not minutes. A unit can be any measure of time they decide, plus they often have minimum call amounts and round up to the next unit. The bottom line is, they have done the math, and it’s going to cost most people more money than selecting a good long distance plan.
Sprint Long Distance
Sprint is a global communications company serving 26 million business and residential customers in more than 70 countries. With approximately 80,000 employees worldwide and $26 billion in annual revenues, the Overland Park, KS-based company is represented on the New York Stock Exchange by the FON group and the PCS group. 
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