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Introduction: Smartphone addiction among adolescents has become a major public health concern, yet culturally adapted and psychometrically robust tools are scarce in Iran. This study aimed to examine the psychometric properties of the Persian Short Version of the Smartphone Addiction Scale (SAS-SV) in adolescents. Methods: This cross-sectional study assessed the psychometric properties of the scale using data from 320 Tehran-based students selected via cluster sampling. All participants completed the short Smartphone Addiction Scale. Construct validity was evaluated through confirmatory factor analysis (CFA), and concurrent validity was examined to assess the SAS-SV’s effectiveness. Cronbach’s alpha and composite reliability measured internal consistency. Results: CFA supported a three-factor solution with acceptable fit (χ²/df = 2.41; CFI = 0.95; RMSEA = 0.06). SAS-SV scores correlated moderately with IAT scores (r = 0.61, p < 0.001), evidencing concurrent validity. Cronbach’s alpha coefficients were 0.71 for daily-life disturbance, 0.84 for withdrawal, and 0.68 for overuse. Discussion: The results of this study introduce the SAS-SV as a research and clinical tool for researchers and professionals in the field of behavioral addiction. This tool can be useful in identifying and preventing behavioral addiction in adolescents. However, it is important to consider cultural limitations in the use and interpretation of the results obtained. result: The results of the confirmatory factor analysis showed that the model has a good fit (RMSEA&amp;amp;lt;.05). In order to explore the factors of this scale, exploratory factor analysis was applied, and it revealed 3 factors daily-life disturbance, withdrawal, the overuse for each of the items. The Cronbach&amp;amp;#039;s alpha for daily-life disturbance, withdrawal, and overuse was 0.71, 0.84, and 0.68, respectively. Conclusion: The Persian SAS-SV shows satisfactory validity and reliability for Iranian adolescents and can be used for screening and research on smartphone addiction. Availability of a brief, culturally adapted tool may support early identification and targeted interventions.