"We took the bold step of rationalising reserve prices and on the first day itself you have bids worth Rs 40,000 crore," Sibal said on the sidelines of a function to launch cloud computing services for public departments.
The government set a pan-India rate of Rs 1,765 crore per MHz as the start price for spectrum in the 1800 MHz band, which is about 26 per cent lower than the base rate in the March 2013 sale, where there were no takers for GSM airwaves.
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For the 900 MHz band, it approved a rate that is about 53% lower than the March auction price.
The Telecom Regulatory Authority of India had recommended a minimum price of Rs 18,000 crore for 5 MHz of pan-India spectrum in the 2012 auction, Sibal had said at the time.
This followed the Supreme Court order of February 2012, asking for the procedure in the 3G auction to be followed.
However, even after the government cut the recommended reserve price to Rs 14,000 crore, the November 2012 auction ended in two days, with bids of about Rs 9,407 crore received for airwaves worth Rs 28,000 crore.
"If you have an irrational reserve price, the market will not be attractive. I have been saying that. Now people should realise how irrational it was at that point in time for media and everybody to shout that the government is losing revenue," Sibal said.
A report by the Comptroller and Auditor General of India, which was tabled in Parliament in November 2010, pegged the revenue loss to the exchequer on account of allocation of 2G spectrum in 2008 at Rs 1.76 lakh crore.
The controversy over the spectrum allocation also led to cancellation of 122 licences by the Supreme Court in 2012.
In the current auction, eight firms, including Bharti Airtel, Vodafone and new entrant Reliance Jio Infocomm, are in the fray.
The government received bids of about Rs 39,300 crore at the end of the first day yesterday, according to Telecom Secretary MF Farooqui.
"I just think that may be we got it right, that's all," Telecom Regulatory Authority of India Chairman Rahul Khullar said without elaborating when asked to comment on the response to the auction.
TRAI had suggested a pan-India reserve price in the 1800 MHz band that was 37% lower than the March 2013 auction. For the 900 MHz band, it had recommended a base price that was up to 62% lower.