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This paper presents a mobile services acceptance model, which includes aspects of trust, contextual fit, and personal initiatives and characteristics in addition to perceived usefulness and perceived ease of use from the technology acceptance model (TAM). The proposed research model was empirically tested using data collected from a survey of 25 users of a mobile service called Mobile Student Information Systems (MSIS). The results reveal that the fitness of the acceptance model is quite good. Our findings indicate that personal initiatives and characteristics, trust, and perceived ease of use are key determinants for the users to adopt the mobile service. Context via its influence on perceived usefulness and perceived ease of use has an indirect affect on intention to use. Furthermore, a striking finding is the negative influence of perceived usefulness on intention to use.