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Senate Commerce Committee Chairman Jay Rockefeller, D-W.Va., sent letters to...

Senate Commerce Committee Chairman Jay Rockefeller, D-W.Va., sent letters to five wireless billing companies last week asking about their roles in wireless cramming, said a committee news release. The inquiry stems from the committee’s broader investigation into whether and how…

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customers are being charged for weekly text messages, horoscopes, fashion tips and celebrity gossip, the letters said. Rockefeller said AT&T, Verizon, T-Mobile and Sprint told the committee the five “billing aggregators” are responsible for placing third-party charges on wireless customers’ bills. The five companies are: OpenMarket, Motricity, Mobile Messenger, mBlox, and Ericcson, not to be confused with mobile telecom equipment maker Ericsson. The letters ask the companies to identify the parties which they have contractual agreements with to place third-party charges on wireless bills, and provide all documents related to consumer complaints they have received about third-party wireless charges, among other questions.