Holding company: Bharti Telecom
Main investment: Bharti Airtel
Ranking: No. 1 in India
Mobile subscribers: 256 million in India, nine million in South Asia, 77 million in Africa
Market value: $27.8 billion; listed on India's National Stock Exchange and Bombay Stock Exchange
Focus: Mobile, home services, digital TV, Airtel business and tower infrastructure
Airtel has become one of the fastest-growing operators in the emerging markets since it began operations in November 1995.
It has the largest optical fibre network among private operators in India and India's widest 3G footprint, but is battling with rival Reliance Jio for 4G supremacy.