MTN's Chairman Phuthuma Nhleko

MTN's Chairman Phuthuma Nhleko

Hannelore Foerster/Bloomberg

Phuthuma Nhleko, chairman of MTN Group Ltd., who replaces Cyril Ramaphosa, took over at MTN in 2002 when the company had just over 5 million mobile subscribers and operations in six countries including South Africa and Cameroon.