Akbar MA, Soomro YA, Khan S. Analytical Study of Reducing Brand Switching (Number Portablity) In GSM Sector. JISR-MSSE [Internet]. 2017 Dec. 31 [cited 2024 Nov. 22];15(2):31-46. Available from: https://jisrmsse.szabist.edu.pk/index.php/szabist/article/view/119