2G Scam: An over view of what happened in 2G spectrum case till now

Following is the chronology of some important developments related to the 2G spectrum case.

May 16, 2007: A Raja appointed as Minister for Telecommunications for the second term.

October 25, 2007: The Centre rules out the possibility of auctioning 2G (second generation) spectrum for mobile services.

September-October 2008: 2G spectrum licences given to telecom firms.

November 15, 2008: The Central Vigilance Commission in its initial investigation report finds lapses and recommends action against certain Telecom Ministry officials.

October 21, 2009: CBI registers a case to probe 2G Spectrum case.

October 22, 2009: The CBI searches offices of the Department of Telecom in connection with the case.

October 17, 2010: Comptroller and Auditor General of India (CAG) indicts the DoT for multiple violations of policy in handing out second generation mobile phone licences.

November, 2010: Opposition rocks Parliament demanding ouster of Telecom Minister A Raja.

November 14, 2010: Raja resigns.

November 15, 2010: HRD Minister Kapil Sibal gets additional charge of the Telecom Ministry.

November 2010: Parliament stalemate over the Opposition demand for a JPC probe into 2G spectrum allocation.

December 13, 2010: DoT notifies the terms of reference of retired Supreme Court Justice Shivraj V Patil committee to look into the spectrum allocation procedures and policies. It is asked to submit its report to the Telecom Minister.

December 24 and 25, 2010: Raja questioned by CBI.

January 31, 2011: Raja interrogated by CBI for third time.

January 31, 2011: The one-man Patil Committee submits its report.

February 2, 2011 : Raja, former Telecom Secretary Siddartha Behura and Raja's former personal secretary R K Chandolia arrested by the CBI in connection with 2G spectrum case.

February 8, 2011: CBI arrests Managing Director of Dynamix Balwas (DB) Group Shahid Usman Balwa.

March 16, 2011: A close aide of former telecom minister A Raja Sadiq Batcha dies in mysterious circumstances in Chennai.

March 29, 2011: CBI arrests two more persons - Asif Balwa (Shahid Balwa's brother) and Rajeev B Agarwal.

April 1, 2011: CBI tells Supreme Court that it is set to take over the probe into the mysterious death of Sadiq Batcha, a close aide of former telecom minister A Raja.