An intense tariff war initiated by Reliance Jio since its commercial launch on September 5 last year has dented Aditya Birla Group’s Idea Cellular’s revenues for a second consecutive quarter. For the quarter ended March this year (Q4FY17), its revenues fell to an “unforeseen level” of Rs 8,126 crore — a sequential quarterly decline of 6.2 per cent. This was the second quarter of decline in revenues for Idea.

Its consolidated loss for the quarter was Rs 328 crore. The company had posted a profit of Rs 452 crore in the same period a year ago. Idea’s ...