The European Union\u2019s ombudsman has opened an investigation into claims by British mobile phone company O2 that the European Commission denied it its rights of defense in an ongoing investigation into roaming charges, the ombudsman said Monday."The aim of the inquiry is to determine if there has been maladministration by the Commission," said Nikiforos Diamandouros, the ombudsman for the European Union\u2019s institutions, in a statement. He has asked the commission to respond to the company\u2019s allegations by Dec. 31.The commission has been investigating three of Europe\u2019s biggest mobile phone companies, including O2, for more than seven years. It issued formal antitrust charges against Vodafone and O2 in July 2004, and against Deutsche Telekom and Vodafone in February 2005. The groups were accused of abusing their dominant market position by demanding "unfair and excessive" roaming charges, the fees for making and receiving mobile phone calls abroad. In its complaint to the ombudsman, O2 accused the commission of failing to provide proper access to files and information, as well as failing to allow a reasonable time for responding to allegations. Further complaints include the infringement of O2\u2019s right to a supplementary statement of objections and of the right to be heard properly, Diamandouros said.The commission believes it has conducted the roaming investigation correctly. "We don\u2019t think O2\u2019s complaint is well founded," Jonathan Todd, the commission\u2019s spokesman on competition matters, said Monday. "We scrupulously respected the company\u2019s right of defense," he added.The ombudsman cannot overturn a commission decision, but his rulings carry political weight. A ruling against the commission while its probe of roaming charges continues would be embarrassing for Europe\u2019s top competition watchdog. It could also help prompt O2 to lodge a formal appeal against the commission at the European Court of First Instance in Luxembourg.O2 representatives weren\u2019t immediately available to comment, but last month when the company submitted its complaint to the ombudsman, it said it had become "increasingly exasperated with the Commission\u2019s conduct of the case and its disregard for due process and O2\u2019s procedural rights."-Paul Meller, IDG News Service (Brussels Bureau)Related Link:\n\nVodafone to Sell 1st Self-Branded PhoneCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.