Sprint and Cingular today announced expanded roaming agreements with rival Alltel. The Sprint and Alltel 10-year agreement is effective July 1, 2006, and encompasses CDMA voice, data and EV-DO high-speed mobile data services. Alltel also said that it had also expanded a roaming agreement with Cingular Wireless, a venture of AT&T Inc. and BellSouth Corp. until 2012. Roaming agreements are common in the U.S. wireless industry, allowing customers to use rival networks in areas where their own p...

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