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Samuel Chukwu, A. and Onwudinjo, U.M. 2026. EFFECTS OF LOWER CALL RATES ON CUSTOMER LOYALTY OF THE GLOBAL SYSTEM OF MOBILE COMMUNICATION IN THE SOUTH EASTERN STATES – NIGERIA; A case of Mobile Telephone Network (MTN). GPH-International Journal of Business Management. 9, 1 (Feb. 2026), 65-79. DOI:https://doi.org/10.5281/zenodo.18448282.