In the present scenario, the competition among businesses operative inside the telecommunication business of India has become terribly intense, and currently it's become terribly difficult for firms to sustain within the marketplace. Currently, India has been recognised as the second largest and additionally the foremost potential communication sector within the world. it's usually expressed that a considerable range of the subscriber base of 1.19 Billion is that the crucial issue that has contributed to such rising and development of the Indian Telecommunication business. the present study depends on Reliance Jio Infocomm restricted which is popularly stated as Reliance Jio whose entry has resulted in making a change of the complete telecommunication business of the country. Reliance Jio is to boot thought-about because the game changer within the whole market, and its entry has adversely affected the sales, profits, market share and client base of the present market players like Airtel, Idea, Vodafone and BSNL. The services offered by Reliance Jio are innovative, highly satisfactory and at a similar time, the complete has used a low value strategy. The results of this can be that Reliance Jio has been ready to penetrate the Indian telecommunication business inside a brief span of your time. This paper aims to analyse the impact of jio on telecommunication business in India . the kind of research used is empirical research and a convenient sampling methodology is employed as a sampling methodology. The sample size is 203. From the analysis of the study it may be concluded that declining sales, market share, client base and profits are the problems that brands like Airtel, Vodafone, plan and BSNL started witnessing once the entry of Jio within the telecommunication business.