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Internet is being used extensively throughout the world from last decade. In India internet service has entered into new generation called 4G. Medical students are particularly vulnerable group for problematic internet use on account of the time they spend online. This might have negative effects on their physical, psychological and social health. Hence they are more prone to internet addiction. To compare use and effect of internet service among medical students before and after the availability of 4G service. Institution based cross sectional study. Prede