Objectives: To know the profile of smartphone use and dependence of adolescents in full-time schools. Method: Cross-sectional study carried out in six State Schools of Professional Education (EEEP) in the city of Fortaleza, Ceará, Brazil, developed between September and October 2019. 286 adolescents (15-19 years old) participated who answered two questionnaires (sociodemographic data, use and smartphone depende...