“…When positive attitude is formed by enhanced PU and PEOU, users are more likely to show stronger behavioral intention (IU) to use the technology. theoretical model especially in exploring user acceptance of various mobile-based technologies and services, including smartphones, 9,10 e-book readers, 11 mobile TV, 12 Internet, 13,14 games, 15,16 learning, 17 banking, 18 chatting, 19 and long-term evolution (LTE) services. 20 Therefore, TAM is a logical framework for empirically studying the role played by screen size in determining user acceptance of smartphones.…”