The need to belong to a social group, equality, relationship with other individuals are important elements that constitute the priorities of nowadays adolescent life and the possibility to create and maintain social relations through the mobile phone which seems to be a solution for them. The acute need to be accessible at any time, linked with feelings of fear and loneliness, generated by the fear of being left out, lead to the overuse of the smart phone. Different opinions appear in the inclusion / non-inclusion of the excessive use of the smart phone in the category of behavioural dependencies. It is important to investigate how the manifested need for social interconnectivity can be assimilated as a state of addiction and may be related to problems of mobile phone overuse.