The company had reported a net profit of Rs 1,536 crore in the year-ago period.
"Net interest costs of Rs 1,603 crore have risen from Rs 1,053 crore in the corresponding quarter last year- largely due to increased spectrum related interest costs," Airtel said in a statement.
Net debt at the end of the quarter stood at Rs 81,480.3 crore. It divested telecom operations in Burkina Faso and Sierra Leone over the last two quarter to pare debt.
"The Board of Directors of the company...Has authorised committee of directors to evaluate option for monetisation of significant stake in Infratel," Airtel said in a BSE filing.
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Airtel holds around 72 per cent stake in Bharti Infratel.
Also, free mobile services of Reliance Jio Infocomm impacted growth of Bharti Airtel's mobile business in India.
Total income increased by 3.4 per cent to Rs 24,671.5 crore against Rs 23,851.9 crore earlier.
Airtel said consolidated revenue growth was muted at 3.3 per cent due to devaluation of Nigerian currency.
India revenues during the quarter ended September 30 grew by 10.1 per cent to Rs 19,219 crore on year-on-year basis.
"This is primarily due to the strong performance of our non-mobile businesses which grew in aggregate at 18.8 per cent Y-o-Y, albeit our mobile business has experienced a slowdown in growth due to free services being offered by a new operator," the firm's MD and CEO (India, South Asia) Gopal Vittal said.
Consolidated mobile data revenues grew by 21 per cent y-o-y to Rs 4,536 crore. India mobile data revenue grew by 23.6 per cent y-o-y to Rs 3,576 crore with 22.8 per cent increase in mobile data subscribers.
Mobile data revenues contributed to 24.7 per cent of total mobile revenues (21.5 per cent in year ago period).
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The company also saw reduction in return on capital to 7.4 per cent during the reported quarter from 9.1 per cent in the corresponding period a year ago.
As part of its expansion, the company launched 4G service across select cities in Bihar and Chhattisgarh.
Airtel reported 4 per cent increase in its Africa revenue at USD 898 million from USD 866 million earlier.
"Underlying Africa revenue growth for the quarter was 4.7 per cent Y-o-Y, backed by our focus on profitable topline growth, led via localised distribution, stronger data networks and our war on waste program," the company's Chief Operating Officer (Africa) Raghunath Mandava said.
The total customer base of company stood at 36.3 crore, which comprised 25.9 crore mobile service subscribers in India and 7.8 crore customers in Africa.