Telecom tycoon's Bharti Airtel, the world's third-largest telecom by subscribers, is expanding its 4G services in anticipation of imminent competition from Mukesh Ambani's Reliance Jio. Weighed down by losses in Africa, it is in talks with France's Orange to sell its telecom operations in 4 African countries. Simultaneously Mittal is selling Airtel's telecom towers in Africa to pay down the company's $10.7 billion debt.