---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Femtocell is a small range, low power cellular base station. It can be deployed inside the home and small office building. The device communicates with the mobile phone and converts voice calls into voice over IP (VoIP) packets. The packets transmit to service provider through a broadband connection such as DSL, cable and optical fiber. Femtocell and cellular network operate on same licensed frequency band spectrum. So active mobile phone easy interference with Femtocell and macro cell (part of cellular network) and the access method used in Femtocell two-tier networks such as Cross-tier and Co-tier networks. Cross-tier interferes between Femtocell tier and macro cell tier. Co-tier interferes between the same elements of the same tier. In this thesis work, an overview of Femtocell has been undertaken. Femtocell is considered an aim of digital India has to connect with a digital communication network anywhere, anytime, anyone. However, the people live in different types of geographical areas, such as mountain, desert, plain, forest and some people face environmental problems so they cannot connect any communication network. Therefore, the Femtocell is a unique solution of this problem and Femtocell installation cost is very low and easily install according to cellular site. Further, the use new standards Home eNode B (HeNB) is a LTE-A (long term evolution-advanced) and also use the Metro-Femto for increase the number of capacity of active mobile phone, improve the coverage area and quality of service (QOS).