This research investigates students' use of smartphones, and their attitudes toward the use of smartphones for learning. The research employs a quantitative approach. All respondents who participated in the study were selected from a degree course in marketing and public relations at the Hong Kong Polytechnic University. From the quantitative study, we collected 116 responses from a total of 140 students. Of the 116 students who responded to the survey, 105 students owned a smartphone. A regression analysis was performed to investigate the factors affecting smartphone usage for learning purposes. The research shows that learner aspects, online interactions, device features, and sharing are the main factors that affect mobile learning intentions in a project-based environment.