Infrastructure sharing has emerged as a critical strategy for telecommunications operators to manage deployment costs, accelerate network rollout, and optimize resource utilization in increasingly competitive markets. This study provides a comprehensive analysis of telecommunications infrastructure sharing strategies, examining both passive and active sharing models through empirical investigation and economic modeling. Using data from the Sudanese telecommunications market and comparative analysis with international studies, we quantify the economic benefits of different sharing arrangements and identify key implementation challenges. Our analysis reveals significant cost reduction potential, with CAPEX savings ranging from 20-65% for different infrastructure components and OPEX reductions of 25-60% across operational categories. The study distinguishes between passive infrastructure sharing (towers, sites, power systems) and active sharing (base stations, network equipment), demonstrating that passive sharing offers substantial benefits with lower implementation complexity. Through detailed case studies of successful cooperation arrangements, including fiber optic network sharing that generated savings exceeding $14 million, we illustrate the practical benefits and challenges of infrastructure sharing implementation. The research identifies cost reduction, regulatory policies, and risk sharing as primary drivers of infrastructure sharing, while competitive concerns, trust deficits, and technical complexity represent significant barriers. Our findings contribute to understanding how infrastructure sharing can support telecommunications development, particularly in developing markets where capital constraints and coverage challenges are most acute. The study provides actionable recommendations for operators, regulators, and policymakers seeking to optimize infrastructure sharing policies while maintaining competitive market dynamics.