D.Shanthi, K.SHRINARTHANA, S.ELSIYA, & M.SARAVANAN. (2017). A study on consumers preference and satisfaction level towards various mobile network operators with special reference to erode district . International Journal of Intellectual Advancements and Research in Engineering Computations, 5(2), 2124–2129. Retrieved from https://ijiarec.com/ijiarec/article/view/1697