Mukesh Ambani on Cash-Flow Discipline

Industry-wide average revenue per user collapsed from roughly $2 in 2016 to about half that by 2019, squeezing every operator's unit economics. The shock triggered exits, mergers and fire-sales: Bharti Airtel sold non-core assets and exited parts of East Africa in 2017, while Vodafone India and Idea Cellular merged in 2018 to combine regional strengths into a pan-Indian operator capable of resisting Jio.

By late 2019 Jio's ARPU had fallen for seven consecutive quarters to Rs 128.4 per user, and rivals, in coordination through the Cellular Operators Association of India, agreed to lift tariffs collectively. The price war had reached a stalemate: Jio had acquired customers but at a unit economics that left its own debt, by some estimates, unmanageable absent future monetization.

Reliance entered telecom at a moment when Indian operators collectively held more than $50 billion of debt, making the sector especially vulnerable to a price war. Analysts at Greyhound Research argued that the country needed three to five viable players for prices to stabilize and flagged the risk of a single conglomerate controlling start-ups, content, telephony, mobile and broadband as a structural concern for regulators.