In this paper, we address some sociological and topological issues associated with mobile phone communication. Based on a dataset of a few million users, we use customers' age and gender information to study relation between these parameters and the average behavior of users in terms of number of calls, number of SMS and calls duration. We also study the dataset from a networking point of view: we define different profiles based on the topological properties of the personal network of each individual and study the relations between these profiles and the age of customers.