The activist says that NSN technology has allowed the Iranian authorities to violate the human rights of its citizens.
According to the lawsuit, the journalist in question was arrested in Iran in the aftermath of last year’s presidential elections after authorities had monitored his use of his mobile telephone.
The journalist said through his lawyers that he had been tortured, and fell ill while in custody. It is hoped that NSN will use its contacts within the Iranian government to free the journalist.
The lawsuit in the US state of Virginia names as defendants Nokia Siemens Networks, and its parent companies, the Finnish Nokia and the German Siemens.