Since few years, mobile phone market is changing radically and many new mobile phones, called smart phones or intelligence phones are entering on the market and have produced a boom. Before, those intelligence phones were only dedicated to professional persons, but mobile manufacturer felt that it could be a potential market and provided additional revenue. So unit sales of smart phones have been growing faster than the overall market for mobile phones. In fact, based upon increased user demand, this trend will continue through 2013. We noticed that smart phone unit sales are poised to grow even faster than the healthy growth over the past few years. Smart phones provide a rich cocktail of features: radio, music, video, network interfaces, gigabytes of storage and powerful processors, games and new applications moreover, they become thinner and cheaper and as a result they entered in the consumer market and they are really appreciated. As we said before, for the past few years smart phones have been aimed at professional consumers and prosumers (they are people who are early adopters with respect to products and have a high passion for news technologies), and it became a new generation of mobile internet devices because a small smart phone that is only four inches long provides sharing of real-time information and knowledge and it can transform lifestyles. The speed of information processing is accelerating, and real-time communication is becoming universal and is no longer constrained by time and space. Smart phones became a real interest for companies and they provide one to each of their executives in order to provide to them an all in one device where they can check their mail and be available twenty for hours a day for their customers. In fact, smart phones changed radically the vision of workers' life because they are now enlisting in a world where work never stops. We noticed that every activity's sector is touched by this phenomenon. However, when workers come back home they are still connected to their job because mail box and other network account stay connected on smart phone and are accessible in one click. The main question is when workers can stop to be alert by their smart phone. Some studies as we saw in the thesis, ask to workers if they stay connected also when they are in their bedroom, and forty four percent of them said yes. When people are not working in their office they are looking at their smart phone every six to twelve minutes. On another hand, thirty five percent of workers checked their mail in the morning and it is the first action they did when they wake up. It is not surprising that smart phone lead to friction in private life of owner of smart phone.
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