Cell C (Pty) Ltd., South Africa's third largest wireless operator, plans to be profitable within three years as it seeks to gain market share from larger competitors MTN Group Ltd. and Vodacom Group Ltd. The mobile-phone company has added 2.5 million subscribers in the past 12 to 15 months to give it a customer base of more than 11.5 million in South Africa, Chief Executive Officer Alan Knott-Craig said in a phone interview today. Vodacom has a market-leading 30.3 million South African active customers, while MTN has almost 25 million subscribers, according to the companies.