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In this study, interviews were conducted to derive user-centered guidelines for the interface design of mobile applications. These guidelines cover general design issues in input, display, navigation, and feedback. They address five out of seven elements that describe effective mobile commerce interface design proposed by Lee and Benbasat [7]. Compared to guidelines obtained in prior studies, the guidelines derived from this study are user-centered and can be apply to multiple form factors. The comparison between e-commerce and mobile commerce design guidelines suggest that the mobile context plays the most important role in designing mobile commerce interfaces.