The global use of smartphone has had tremendous social, environmental, and economic impacts in the last decade, and continues to grow impressively. In order to comprehend customers' purchase behavior, it is crucial to understand the driving force behind their choice of one specific brand among various competitors. A few prior researches have demonstrated that not only the optimal experience of flow, but also identity features (i.e., self-identity, social identity, brand identity) facilitate a customer's purchase intention. Previous studies also indicate that brand-related constructs (e.g., typically brand image but sometimes also brand personality and communication) predict purchase intention. As the first study combining flow, which focuses on investigating the consumer purchase behavior through identity and brand-related constructs, we propose a conceptual model that combines flow theory, brand image, brand communication, brand identity, and brand personality to investigate purchase intention. We have empirically tested the conceptual model based on the data collected from 1377 Chinese smartphone users. Results via the structural equation modeling with AMOS software indicated that flow experience, brand image, brand communication, brand personality, and brand identity all directly or indirectly explain purchase intention. Flow experience serves a critical role in mediating the path from brand communication, brand personality, and brand identity to purchase intention. The research focuses on the strategic implication of the various brand features management and aims to harmonize economic, social, and environmental sustainability.Sustainability 2020, 12, 3391 2 of 22 to maximize immediate economic profit with little care for its long-term sustainability in terms of economic, environmental, and social impacts. This is a common global phenomenon that affects the global world community, irrespective of culture, language, latitudes, geography, religion, policy, etc. Meanwhile, the levels of analyses for such phenomena encompasses all STEM (Science, Technology, Engineering and Mathematics) and SSH (Social Sciences and Humanities) disciplines. However, one of the keystones of this global contemporary phenomenon is the interface among this technology and its users, which are responsible for its universal adoption. The psychological level of analysis is a key to better understand the behavior of smartphone users. Furthermore, there are other inputs that are important to understand consumers' purchase driving force. For example, the motivations behind individuals' choice and purchase intention of a specific brand among various brands of smartphone needs to be further explored on both the psychological and economic level. Therefore, acquiring deeper knowledge at the psychological level could contribute ideas and insights for developing strategies to better cope with the various negative consequences by finding new ways to harmonize social, environmental, and economic sustainability, and, consequently, to develop strategies...