 The use of Smartphone has been adopted faster than any other device in the history of digital electronics. Hence it is estimated that in 2016, 2.1 billion were found registered Smartphone users in the world and Pakistan was ranked 10th in the list of top 10 countries with largest number of mobile phone subscribers. Despite of its useful and timely utilization, the excessive use of Smartphone coerce the Individual to be dependent on the use of Smartphone psychologically and even physically. Furthermore, among the users, adolescents and young adults used Smartphone 90 more than any other age groups. Moreover, this prevalence is expected to rise in the future due to the easy availability and swift changes and addition of new applications to Smartphone technology. Subsequently, the excessive and irrational use of Smartphone leads to Smartphone addiction which impact on individual mental health, physical health, and disrupt social, economic and educational functions. So, this study aims to assess the effectiveness of Cognitive Behavioral Therapy CBT as an evidence based remedy in the treatment of Smartphone addiction. The study will comprise of two groups; one will receive CBT intervention group and the other one will be on Treatment As Usual TAU. The aim of the study is to assess the effectiveness of CBT primarily by measuring the addictive smartphone usage assessed by Smart Phone Addiction Scale SAS and also on secondary outcomes including time management, academic performance and social functioning of adolescents. These assessments will be conducted before intervention on the baseline assessment sessions, during the Intervention and after the intervention on follow up assessment sessions. A total of 120 students were calculated on the basis of 80 statistical power required to detect the effect as indicated by previous study and will be selected from different educational institutions. SPSS 23.0 will be used for data analysis. The primary analysis will be mixed ANOVA to compare the between group and within group means differences on measures used in the study. Multiple Hierarchical Regression analysis will also be used for the prediction of outcome variables from the demographics. The total duration of the study is one year. 