He 2G spectrum scam involved officials and ministers in the Government of India illegally undercharging mobile telephony companies for frequency allocation licenses, which they would use to create 2G subscriptions for cell phones. According to a report submitted by the Comptroller and Auditor General based on money collected from 3G licenses, the loss to the exchequer was 176,379 crore (US$39.16 billion). The issuing of the 2G licenses occurred in 2008, but the scam came to public notice when the Indian Income Tax Department investigated political lobbyist Niira Radia and the Supreme Court of India took Subramaniam Swamy's complaints on record [With Case type:Writ Petition (Civil),Case No:10, Year:2011]. The case details of the main PIL filed with the supreme court is Type:Writ Petition (Civil),Case No:423, Year:2010.
Former Telecom Minister of the NDA government Arun Shourie was the whistleblower who helped uncover the scam and also exposed many loopholes in the UPA government'