Wafula, J., Msanjila, S. and Chali, F. 2024. On Development of a SIM-Based Prototype for Enhancing the Usability of Mobile Value-Added Services. East African Journal of Information Technology. 7, 1 (Sep. 2024), 240-262. DOI:https://doi.org/10.37284/eajit.7.1.2174.