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Objectives The present study sought to assess (1) phone use habits and awareness of listening aids in adult cochlear implant bearers, and (2) objective and subjective benefit of listening aids for cell-phone communication. Material and methods A questionnaire was sent to 17 cochlear (Cochlear ® ) implanted adults to assess phone use and awareness of available listening aids. Speech perception without lip-reading was assessed in silence and in noise using Fournier dissyllabic word lists recorded on an iPhone 5C ® , with and without listening aids. Subjective benefit was assessed according to listening aid system. Results Sixty-five percent of adult cochlear implant bearers regularly used a phone with all kinds of correspondent. Eighty-eight percent phoned only in quiet conditions; 53% did not answer unknown callers; 71% never used listening aids. Speech discrimination scores for disyllabic words recorded on the phone were respectively 69%, 63%, 45% and 16% in quiet and 50, 60 and 70 dB SPL noise. Speech perception in quiet and noise was improved by listening aids; the Roger system was the most beneficial, followed by the FM system, then the inductive system. Conclusion Listening aids are effective, but little known by adult cochlear implant bearers. [ABSTRACT FROM AUTHOR]