With many school leaders now using so-called "smart phones" to keep in touch with the central office as they travel from school to school or patrol the hallways, the emerging threats that are targeting these devices--such as cell-phone viruses and mobile spam--should be of growing concern to schools.

Consider the example of Sedef Onder, owner of an advertising firm in New York City.

Late on many Friday evenings, her mobile phone goes off, signaling receipt of a text message announcing the time and place of a hot club


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