The company will use 2100 megahertz band, which is used for 3G services, for 4G services.
"Where we have the second carrier of 3G or third carrier then through the flip of software you get incremental capacity on 3G. Most of that spectrum will finally go towards 4G for which we will need to have radio units," Vittal said.
He said that in some telecom circles the company has installed modern 3G equipment which can support 4G services but the initially deployed equipment for 3G services will need to be replaced.
"Some of the older radios are pure 3G which we need to replace. It will take its time. I think that the answer for that will be function of how fast pick up of voice happens on VoLTE (4G voice call network). The moment that happens voice will not be required to be carried on 3G which can help reafrm us 2100 Mhz for 4G," Vittal said.
The telecom major on Tuesday posted a sixth straight quarter of drop in earnings as its consolidated net profit plunged 76.5 per cent to Rs 343 crore for the September quarter compared to Rs 1,461 crore it registered in the same period a year ago.
However, it recorded four-fold growth in the mobile data traffic during the reported quarter in India, and its mobile broadband customers rose by 33.6 per cent to 55.2 million.
An Airtel representative on the call said that revenues will be further hit to the tune of 4 per cent of its consolidated EBITDA or around Rs 300 crore in the ongoing quarter due to a reduction in mobile call connection charges to 6 paise applicable from October 1.
charged 14 paise a minute for allowing a domestic call from a rival operator to terminate on their network before October 1. The Telecom Regulatory Authority of India, the body which determines it, has made it 6 paise per minute from October 1, 2017.
The consolidated revenues for the just-ended quarter, at Rs 21,777 crore, represented a year on year drop of 10.4 per cent ( a reported drop of 11.7 per cent) on an underlying basis when adjusted for Africa and Bangladesh divested operating units and tower asset sale.
In a separate development, Airtel announced the transfer of its optical fibre business to its wholly-owned subsidiary Telesonic Networks for a valuation of up to Rs 5,650 crore.
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