Technology adoption models specify a pathway of technology acceptance from external variables to beliefs, intentions, adoption and actual usage. Mobile phone adoption has been studied from a variety of perspectives, including sociology, computer-supported cooperative work and human-computer interaction. What is lacking is a model integrating all these factors influencing mobile phone adoption. This paper investigates technology adoption models as a strategy to match mobile phone design to user's technological needs and expectations. Based on the literature study we integrate three existing technology adoption models and then evaluate the proposed model with interviews and a survey. The contribution of this paper is a model for representing the factors that influence mobile phone adoption.