Sunil Bharti Mittal, Chairman of Bharti Enterprises and founder of Bharti Airtel, has urged the world to invest in Africa, calling it the last continent of hope. Mittal's own experience with Airtel's operations in Africa has given him insight into the continent's potential. Airtel Africa struggled initially, but has since turned around its business through rationalization, debt reduction, and network expansion. The company aims to become the leading player in the African market, benefiting from low user penetration and increasing data usage.