Smartphone is the most wanted gadget of this era and smartphone addiction is the association with its use. This research aims to find the role of craving, social relationships, and overuse of smartphone as determinants of smartphone addiction and its influence on students' academic performance. This study uses purposive sampling (nonprobability) technique and survey method was adopted. The data was collected through online questionnaire via Google Forms from 300 students of Bachelor of Education (hons.) studying in the Department of Teacher Education, Shah Abdul Latif University, Khairpur Mirs'. For hypotheses testing, structural equation modeling was used.