Assessment of International Roaming Service Management and Bilateral Agreement Effectiveness for Nigerian Operators

International roaming services enable Nigerian mobile subscribers to access telecommunications services abroad and attract inbound roaming revenue from foreign visitors, with the quality and cost-effectiveness of roaming arrangements reflecting both technical and commercial management competencies. This study assesses the management of international roaming services by Nigerian mobile network operators, examining bilateral roaming agreement structures, settlement rate negotiations, technical interconnect quality, and roaming fraud management. A professional study combining structured interviews with fourteen roaming operations managers and network interconnect engineers at MTN, Airtel, and Glo, review of sample roaming agreement structures, and analysis of roaming quality complaint data from NCC's consumer records was conducted. Results indicate that Nigerian operators maintain bilateral roaming agreements with networks in over 180 countries, but agreement quality is highly variable. Roaming quality-of-service standards specified in bilateral agreements are rarely enforced, with testing conducted on an ad hoc basis. Outbound roaming charges to Nigerian subscribers traveling within ECOWAS member states were found to substantially exceed the ECOWAS Common Market directive thresholds, representing potential regulatory non-compliance. Subscription roaming fraud, primarily synthetic identity fraud enabling unauthorized roaming access, accounted for estimated losses of 3.1 billion naira annually across the three operators reviewed. Recommendations include adoption of a standardized GSMA bilateral roaming agreement template, automated roaming fraud detection system upgrades, and NCC engagement with ECOWAS partners to enforce regional roaming tariff directives. Keywords: international roaming, bilateral agreements, roaming fraud, Nigerian operators, ECOWAS.