Free calling trick for all operators (2 mins & in Hindi)

1. Call 1800-20-80-2080 . It will disconnect automatically.
2. Almost immediately , you will receive the callback
3. Pick up and follow the instructions
4. Your call will be connected to your friend for 2 minutes.

PS: When I spoke number in Hindi, it was unable to identify. Third time it asked me to type and after that I was able to make call successfully.

I know 2 minutes is a very less time but may help you out in emergencies.
By the way, after so many offers from Freecharge and Paytm, I really doubt if someone would be in ‘emergency’ .
Just posted since it doe not cost anything to try