News MTN South Africa introduces virtual top-up solution By Oluniyi D. Ajao - 8th September 2005 MTN South Africa has introduced a virtual airtime top-up solution that allows the sale of airtime to prepaid customers from a cellphone, anytime, anywhere. RelatedMastercard and Ukheshe to Launch Virtual Card SolutionOPPO introduces Reno7 5G Premium smartphone in South Africa