This paper reports on a study examining user-centred design methods by testing mobile phone/GPS interface prototypes with visually impaired users. Visually impaired users were interviewed in order to detect problems with interface and mobile phone design. Although speech interfaces have improved mobile-phone usability, users described several problems when using their mobile phones. Their responses indicated that designers should pay more attention to the physical design of mobile phones. Firstly, the size of the display and keyboard are often too small for elderly visually impaired people. Secondly, surface materials should have more friction to prevent them from slipping and falling. In addition, it appeared that the people interviewed also desired GPS systems with an interface designed specifically for blind and visually impaired users.