ISD/ILD prices have fallen from a peak of Rs90/Minute to less than Rs9.0/Minute now.(Airtel offers @ Rs7.2/Minute to the US/Europe). STD/NLD Tariffs have fallen from Rs40 to Rs1.0 in IndiaOne plan and even less on Reliance & MTNL capital region plans.
Local calls on Landlines have just halved(they should be eventually be free, some telcos provide free calls for dial-up internet users) while that on Mobiles have fallen from Rs14.0/Minute in 1996-97 to Rs0.5/Minute depending on the scheme now.
Check out this graph.