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Technology acceptance research has tended to focus on extrinsic motivation based on sole theoretical paradigm. Building upon and integrating the key findings of four closely related theoretical paradigms (the technology acceptance model, the theory of planned behavior, innovation diffusion theory, and the flow theory), we developed and test a more comprehensive and unified model in the context of Chinese userspsila adoption decision of wireless Internet services via mobile technology. Structural equation analysis demonstrate that perceived usefulness and perceived enjoyment significantly influence the attitude towards using WIMT, which in turn impacts their behavioral intention, reveals that both extrinsic and intrinsic motivations are important determinants of adopt intention. Further more, social influences and personal traits such as individual innovativeness are important determinants of adoption as well. The paper concludes with some important implications.