Reliance Jio Infocomm Ltd, controlled by India's richest man, Mukesh Ambani, opened for business in September and has shaken the Indian telecoms market with its free voice and cut-price data plans spurring a flurry of similar offers from incumbents led by Bharti Airtel Ltd.
That has increased costs, eroded margins and even forced Vodafone Group Plc's Indian unit to talk to Idea about combining their businesses, potentially creating the market's biggest carrier.
Idea, part of the Aditya Birla Conglomerate, on Saturday said it had a consolidated net loss of Rs 384 crore ($57.47 million) in its fiscal third quarter ended Dec. 31, compared with a net profit of Rs 659 crore a year earlier.
The loss was slightly bigger than analysts' expectations of Rs 371 crore, according to Thomson Reuters data.
The core telecom operations loss, without including its stake in a telecom tower joint venture, was even higher at Rs 479 crore on a standalone basis, Idea said, and was the first-ever quarterly loss since June 2006, Thomson Reuters data.
Idea said in a statement it cut mobile voice rates by 10.6 per cent and data prices by about 15 per cent in the December quarter to retain its customers.
Smaller rival Reliance Communications also reported on Saturday a consolidated net loss of Rs 531 crore for the third quarter ended December. It also blamed competition among other factors for the loss.
Bharti Airtel, the top Indian telecommunication carrier, reported its lowest quarterly profit for four years last month, hit by the price war.
($1 = Rs 66.8131)
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