BACKGROUND: The usage of smartphones has become common among adolescents, despite knowing the health‑, related problems of the user. Currently, the availability of electronic gadgets has become economical and this has an impact on society, especially on the behavior of adolescents. MATERIALS AND METHODS: A cross‑, sectional survey design was used to find the pattern of smartphone usage, smartphone addiction, and subjective health problems associated with smartphone usage. The data were obtained from 270 nursing students using the convenient sampling technique using a sociodemographic proforma, semi‑, structured questionnaire on the pattern of smartphone usage, smartphone Addiction Scale, self‑, reported subjective health problems questionnaire, and study habits scale. STATISTICAL ANALYSIS: Descriptive and inferential statistics was used for the analysis using SPSS 16. 0. RESULTS: The study findings revealed that most of the participants 243 (90. 0%) were using 4G phones. The majority 88 (32. 60%) of the participants were using a smartphone for less than 2 hours at a stretch in a day. Most uses of a smartphone were in the night 155 (57. 40%). The main usage of a smartphone was for entertainment purposes 213 (78. 90%). Most of the participants 196 (72. 6%) were moderately addicted to smartphones. One‑, third 109 (40. 2%) of the participants complained of headache, followed by straining of the eyes 83 (30. 6%). CONCLUSION: The awareness of smartphone addiction and health‑, related problems associated with smartphone usage has been shown to decrease its impact. The study concluded that it is very much necessary to identify the pattern of smartphone usage, to prevent the consequences of addiction and health problems associated with smartphone usage.

Background and purpose: It seems that the main source of smartphone addiction in teenagers and young adults is environmental stress such as school and family,The present study was conducted with the aim of smartphone management styles and smartphone addiction: the mediating role of hot executive functions in students. Methods: The research method is cross-sectional correlation. The statistical population of this study consisted of all students of normal schools for boys and girls aged 15 to 18 years living in Tehran in 1399-1400, from which 722 people were selected by available sampling method. In this study, mobile dependency tools (Bianchi and Phillips, 2005), smartphone management styles (Hsieh et al., 2019) and executive functions (Balster Gerrard et al., 2000) were used, all of which have valid credibility and reliability, they were accepted. SPSS-V24 and Amos-V8. 8 software were used to analyze the data. Results: Structural equation modeling was also used to answer the research hypotheses. Findings showed that the model has a good fit. The results also showed that the direct standard path of smartphone management on smartphone addiction is indirect and significant (P=0. 05). Conclusion: The results showed that the effect of direct standard of smartphone management on phone addiction is significant and the effect of indirect standard of smartphone management on phone addiction with the mediating role of hot executive functions is significant. Therefore, paying attention to the mentioned variables in prevention and designing more appropriate therapies will help researchers and therapists.