In recent years, smartphone behavior has become a popular topic to study due to its extensive impacts on ordinary people’s lives, especially those on students. Literature has suggested that emotional intelligence and social skills are some of the important factors contributing to addictive behaviors. Therefore, the purpose of this study was to examine whether SI and EI leads to smartphone addictions. The sample consists of 205 participants from University of Finance and Economy in Mongolia across different departments, courses and gender. A survey was done. Data contains measurements of EI, SI, Addictive smartphone behavior and Habitual smartphone behavior scales were collected. The research result shows that SI mediates the relationship between EI and addictive smartphone behavior.