Karl Olutukun Toriola, who became head of MTN Nigeria, South African telecommunication giant MTN's biggest subsidiary, on 1 March, has every reason to be happy. The annual results published by the company just a few days after his arrival have confirmed that it has held on to its dominant position on the Nigerian market. With 76.6 million users - 12.2 million more than in 2019 - MTN has a market share of close to 40%. The crisis created by the Covid-19 pandemic led, moreover, to a surge in the use