Mobile technology has evolved exponentially interms of contents and subscriber growth within the past few decades. This evolution has come with its numerous value added services that are delivered to customers via legacy mobile communications networks that have little or no services within confined areas, homes and offices. This limitation together with high demands for services within indoor environment, have thrown a challenge to mobile operators and manufacturers to come up with solutions for addressing the poor Quality of Service (QoS). The concept offemtocells has been considered to be one of the available techniques for improving the degraded QoS within indoor environment. Femtocell is a compact portable low power home base station that can be connected via home internet access such as home digital subscriber line (DSL), fiber opticbroad band connection or any other available broadband connectivity to extend and improve mobile signal reception and also provide other wireless applications such as data, movies and pictures transfer. This paper provides an overview of femtocell technology applications and deployment scenarios for indoor environment that are characterized by multipath and attenuation which affects the performance of received signal hence degrading the QoS available to customers. Security and handover with in femtocell are also addressed.