This study investigates the role of Information Systems (IS) and technology in optimizing planning functions within Nigeria’s telecom companies. The purpose of the research is to explore how the adoption of IS, such as Enterprise Resource Planning (ERP), Customer Relationship Management (CRM), and Business Intelligence (BI), can enhance strategic planning capabilities in the telecom sector. Using a mixed-methods approach, the study combines quantitative surveys with qualitative interviews to gather insights from industry professionals. Key findings reveal that IS adoption significantly improves decision-making (85%), resource allocation (78%), and market analysis (71%). However, challenges such as poor infrastructure (76%), skills gaps (64%), and high implementation costs (58%) hinder the full potential of these technologies. The study concludes that while IS plays a crucial role in optimizing planning functions, addressing infrastructure deficiencies and investing in workforce development are essential for maximizing its effectiveness. The research provides recommendations for telecom companies and policymakers to enhance infrastructure, support employee training, and explore emerging technologies to further improve strategic planning and maintain a competitive advantage in the rapidly evolving telecom industry.