I was a big fan of tata docomo my fist sim was also from tata docomo network. I used 2g internet from my nokia mobile 4-5 year ego that time I got a very good data pack 2 gb internet data for 30 days in only 48 ruppes than after some time.
I got new data pack from docomo was 2.5 gb internet data from 65 ruppes but in now days dada pack is very very costly having very low data in very expansive price. Now days in 50-60 ruppes I only can get 300-500 mb internet data. So I think it is very costly in term of internet.