Afzal, Sarwat, Aamir Khan Chandio, Sania Shaikh, Muskan Bhand, Bais Ali Ghumro, and Anum Kanwal khuhro. 2013. “Factors Behind Brand Switching in Cellular Networks”. International Journal of Asian Social Science 3 (2):299-307. https://archive.aessweb.com/index.php/5007/article/view/2417.