Don't know much about data needed ...but I previously(before JIO came) used IDEA 's dongle of 1GB monthly plan which give me 20+ days unimterupt use of NEST & NOW RTD data to ami etc.....after that JIO came am using it since its start...
Vijay, I think he is asking about the bandwidth needed to run GDFL data. I would reckon atleast a 1 mbps line for smooth functioning. I remember 5 years ago I used to have a 1 mbps line and trading on nest was fine. In todays world I think no one offers anything less than 1 MB bandwidth. This should cost you no more than 500-600 Rs per month.