One-time gain, for fourth time in a row, saves day as Airtel falters in war with Mukesh Ambani’s Jio

In a war for the control of India’s billion-plus mobile-services market, tycoon Sunil Mittal seems to be floundering in the face of a juggernaut unleashed by Mukesh Ambani. For at least a fourth quarter in a row, Mittal’s Bharti Airtel Ltd. shored up its profits with one-time gains, masking headwinds posed by upstart Reliance Jio Infocomm Ltd. Jio’s roll-out, after its 2016 debut, has knocked Airtel from its perch in a consolidation that shrank the industry to three players from about a dozen four years ago.

Airtel is struggling to add subscribers in a saturated market after Jio managed to lure more than 300 million users over the past three years — a quarter of the world’s second-largest market. The aggressive expansion of Jio with free calls and cheaper data, backed by the deep pockets of Asia’s richest man, was bad news for highly indebted incumbents engaged in a tariff war that had pushed call rates to less than a cent.