The rapid expansion of mobile data usage in developing countries necessitates the evaluation of data network performance to enhance service delivery and customer satisfaction. This study evaluates the performance of the GLO 3G data network in Bali Metropolis, Taraba State, Nigeria. The research assesses the network's quality, speed, and reliability, considering their impact on the overall user experience. The study employs a mixed-methods approach, combining quantitative data from network performance measurements and user surveys to gather comprehensive insights. For the quantitative aspect, network performance metrics, such as throughput, latency, and signal strength, are collected using specialized software installed on smartphones distributed across the study area. On the other hand, the qualitative aspect involves conducting surveys to understand users' perceptions, satisfaction levels, and usage patterns related to the GLO 3G data network. The findings of this study will shed light on the strengths and weaknesses of the GLO 3G data network in the Bali Metropolis. The evaluation will identify potential areas for improvement, enabling service providers to optimise their network infrastructure and address customer concerns effectively. Moreover, the research will contribute to the existing knowledge on telecommunications in developing regions, providing valuable insights for policymakers and stakeholders seeking to enhance digital connectivity and bridge the digital divide in Nigeria.