Is there absolutely any way (hook or crook) to listen to ATC in India, especially Bangalore?
In principle you can listen to ATC of VOBL (Kempegowda International Airport, Bangalore) using a VHF air band radio receiver on the following frequencies:


Tower: 124.35 MHz
Ground: 121.65 MHz
Approach: 121.25 and 127.75 MHz


It is however illegal to own such a receiver in India:


  
  Prohibition of possession of wireless telegraphy apparatus
  without licence.—Save as provided by section 4, no person shall
  possess wireless telegraphy apparatus except under and in accordance
  with a license issued under this Act.
  


(The Indian Wireless Telegraphy Act, 1933, emphasis mine)

There used to be coverage of Mumbai ATC on liveATC.net, but according to this thread on pprune.org it was shut down, presumably because it is illegal to pass on ATC transmissions in India.

See also:


Is it illegal for Joe Public to listen to ATC in the UK?