The Airtel logo at a retail store in Mumbai, India. (Photo: Dhiraj Singh/Bloomberg)
When Mukesh Ambani muscled into India’s telecom sector with free services and rock-bottom data pricing, incumbents dug in by cutting tariffs. That didn’t stop Asia’s richest man from storming past them to the No. 1 crown. Still, billionaire Sunil Mittal’s Bharti Airtel Ltd. is in the fight even as things have turned worse for Vodafone Idea Ltd.Ambani’s Reliance Jio Infocomm Ltd. has 33 crore subscribers and the biggest market share b...