Bellsouth Colombia, operating under Mobile Country Code (MCC) 732 and Mobile Network Code (MNC) 102, was a significant mobile network operator in Colombia, South America. While the Bellsouth brand is no longer directly active in the Colombian market, its legacy is crucial to understanding the evolution of mobile communication in the country. Bellsouth’s presence contributed to the initial expansion of 2G and possibly early 3G technologies, playing a role in connecting Colombians across diverse geographic regions. Its infrastructure and customer base were eventually integrated into another prominent network, contributing to the competitive landscape that characterizes Colombia’s telecommunications sector today. Compared to other major Colombian networks like Claro (Comcel), Movistar (Telefónica), and Tigo (Colombia Telecomunicaciones), Bellsouth Colombia once held a considerable market share. Its strategies, service offerings, and investments helped shape consumer expectations and influenced the adoption of mobile technologies nationwide. Examining Bellsouth’s operational history and subsequent transition provides valuable insight into the challenges and opportunities that mobile network operators face in a dynamic market like Colombia, especially within the broader context of South and Central American telecommunications. Its story highlights not only the growth of mobile services but also the consolidation and shifting alliances within the industry.