Background: Mobile phones have become an indispensable communication tool. Smart mobile phones having advanced features are more attractive than regular mobile phones among the younger generation. Apart from being an essential communication tool, it is also source of entertainment, information & many others .With increasing utilization of smart phones, several psychological & behavioural problems have emerged.
Objectives: 1. To assess the usage pattern of smart mobile phones among students of a professional college.
2. To evaluate the mobile phone dependence among students of the same college.
Materials & Methods: A Cross-Sectional study was conducted  among 100 Medical & 100 Engineering students selected by random sampling technique at Anil Neerukonda Educational Society, Visakhapatnam, using a pre-designed & pre-tested questionnaire. The Data was analysed using Descriptive & Inferential Statistics.
Results and Conclusion: Majority of respondents were females (52.5%)  in the age group of 19 years. Medical group included 32% males & 68% females and Engineering group included 63% males & 37% females.75% of students in both the groups were using mobile phone for a duration of 1-6 hours daily. While 32% students had addiction scale of more than 31 another 33% students were in the addiction scale range of between 22 to 30. An increased dependence of mobile phone usage among Medical & Engineering students had a negative effect on  their physical and mental health resulting in poor academic performance.                                                                                                                           

Keywords: Smart mobile phone, Dependence