<p>Nomophobia (No-Mobile-Phone Phobia), defined as the fear or anxiety experienced when individuals are unable to access their smartphones, has emerged as a growing digital wellbeing concern among adolescents worldwide. Although smartphone access continues to expand across Ethiopia, limited attention has been given to the potential mental health implications of excessive smartphone dependence among secondary school students. This policy brief synthesizes recent international evidence on the relationship between nomophobia and adolescent mental health and examines its implications for the Ethiopian education system. Evidence from cross-sectional and longitudinal studies indicates that problematic smartphone use is associated with anxiety, depressive symptoms, sleep disturbances, reduced academic engagement, and emotional dysregulation. Despite growing digital connectivity, Ethiopia currently lacks school-based digital wellbeing frameworks, standardized screening mechanisms, and comprehensive policies addressing technology-related behavioral risks among adolescents. Drawing on evidence from international school-based digital wellbeing programs implemented in countries such as South Korea, the United Kingdom, and Australia, this policy brief proposes contextually relevant policy actions for Ethiopia. Key recommendations include integrating digital wellbeing education into secondary school curricula, strengthening school counseling services, promoting parental digital literacy, establishing national guidelines for responsible smartphone use, and supporting local research on adolescent digital wellbeing. These measures can help maximize the educational benefits of digital technology while protecting adolescent mental health and educational outcomes.</p>