Mobile service usage has become an important research topic in the field of MIS. In the past decade, research results have important implications for marketing managers with regard to the development of mobile services or advertising content employed to increase a consumer’s intentions to use. In this paper, authors consider that a customer is not only a service user, but also the partner of a firm. Therefore, they focus on two determinants of customer recommendation behavior, namely, overall satisfaction and flow experience. They also propose a number of hypotheses related to the constructs of overall satisfaction, and test them using data provided by 3G mobile service subscribers.