I had been using Tata Docomo as my Data operator sijce 2014 in Uttar pradesh West circle.
In starting all went fluently for 1 year at that time they were also providing 1 hour unlimited 3g pack in my area that was very good and usually lets me download 500mb in 30 minutes and so 1gb in just 13rs .
After 1 year main problems started to arise, calls started getting costlier and data was matching the price of gold, all those small packs like that 13 rs pack got cancelled by Tata Docomo and now I use to recharge 250 rs for a month.
But in that costlier pack also there was high speed capling and I was not able to download even 300 mb in.30 minutes which is a same on 3g .
ALSO VAS started on my nunber and on contacting customer support they never took any action.
My suggestion dont go with this operator rather just go for reliance its best.