In this paper we describe a case study of Universal Design applied to mobile phone physical devices. Using a user-centered design process, we tried to integrate visually-impaired, hearing-impaired and elderly peoples' needs to design mock-ups adapted in terms of usability and design style. Keywords Universal Design, user-centered design process, disabled people, mobile phone. ACM Classification Keywords H5.2. Information interfaces and presentation: User Interfaces ? ergonomics, user-centered design.