The screen whether it is mobile, computer and tablet is a symbol of our modern age. For our children the” digital natives” who have grown up surrounded by digital information and entertainment on screens. Screen Time has become major part of contemporary life. There has been growing concern about the impact of screens on children and young people’s health. So, we plan to study the pattern of mobile phone use and reason behind the mobile use along with the various effects of mobile phones amongst the urban children and follow up after 3 months. Physical inactivity and sedentary behavior have been independently associated with wide range of negative health indicator including obesity, poor cardio metabolic and psycho social health. Total sedentary time can be classified by variety of specific sedentary behavior such as reading, playing quietly, watching television. Mobile phones use which comes under screen time takes almost 1/3rd of total sedentary time. Mobile phone use has become the major part of screen time use. Pediatric organizations recommend no more than 1-2 hour of daily screen time for age 2-5 years and discourage screen time below 2 years of age. Our aim is to systematically examine the pattern of mobile phone use and reason behind the use along with the effect on children in urban population and follow up after 3 months either in person or telephonically.