But Mark Li of Sanford C. Bernstein, a research firm, suspects that its handsets do not make the sort of double-digit margins earned by Apple.
This case involving a purported breach of security is not the first time Citadel has come down hard on those whom the firm suspects of compromising its highly secret system.
A cascade of questions followed about his judgment as a public official, not least that he had inappropriately lobbied city officials on behalf of Interstate Industrial, a construction firm suspected of links to organized crime.
The advance comes as the F.B.I. has made little headway in the anthrax case, with no firm suspects, and plans at a news conference this week to raise the reward for information about the case.
François Detavernier, the marine manager for France Shipmanagement, the parent company of the owners of the Limburg, said that the firm suspected all along that terrorism caused the explosion.
Nearly a week after 15 Christian worshipers and a police officer on duty outside their church were gunned down in the southern city of Bahawalpur, Pakistani officials say they have no firm suspects in the killings.
Mr. Kuriansky, a former special prosecutor, knew that Mr. Kerik had intervened on behalf of a firm suspected of mob ties and that the commissioner's brother and best friend worked for the company.
In one case, an S.E.C. official, asked about the agency's lenient treatment of an equity firm suspected of fraudulent practices, said he had probably given the company "the benefit of the doubt" because it was represented by a former S.E.C. official.
In an interview with The Associated Press in New Hampshire, Mr. Giuliani said that he had erred in not thoroughly vetting Mr. Kerik, who is now under a federal investigation for accepting free renovations while he was working for Mr. Giuliani from a construction firm suspected of having links to organized crime.
