The mobile telecommunications market comes presenting, since its first appearance, technological fast advance and increasing use for the world-wide population. This growth brings great profits to the involved and, as we can see, the number of players in the dispute for the sector increases in the same proportion. In Brazil it is not different. The increase of the competition made prices grow, improved the variety of the devices and diversified the services, focused before exclusively in the voice transmission, fact today rare mentioned in the sales announcements. Therefore, becomes basic the information about the best technology to be used, how to make clients faithful, where and how to invest, in fact, all strategy that could be studied to guarantee the survival in this market.