Cingular, the largest wireless service provider in the U.S., has asked the FAA to maintain its ban on cellphone use aboard aircraft in flight. In a June 8 letter to the agency, the Atlanta-based company said it is concerned about the potential disturbance to passengers from “inconsiderate” phone users. “We believe there is a time and place for wireless phone conversation,” said Cingular executive v-p Paul Roth, adding “and seldom does that include the confines of an [airline] airplane in flight.” The FAA and FCC are seeking comments on a proposal to lift the ban.