Author(s): Noor Firdoosjahan and Hadi Salah Abdurrahman AtiatCommunication has become one of the most important aspects of promotion today in marketing. In the sectors where there is a more competition, it has becomes very important. The importance of communication has increased as a result of the development that has occurred in the telecommunications??? sector in Jordan, as this development has led to the provision of modern communication techniques in order to contribute towards the speed of information delivering to the customers in the right place and at right time. The current study aims to study the impact of Sales Promotion tools used by mobile service provider Companies on customer buying behavior in Jordan. The descriptive and analytical research methods are used to describe the phenomenon in question. Taking into account the limited number of telecommunications companies in Jordan, notably, all telecommunications companies were taken by a comprehensive survey, accordingly, the sample of the study consists of 600 customers selected through convenience sampling method. The study found that there is a significant impact of Sales Promotion tools used by mobile service provider Companies on customer buying behavior and their satisfaction towards the various services provided by these companies in Jordan.