I have been using tata docomo as my primary sim’s network over 6 years. the call rates are cheap you can get 1p/2s on tarrif. The mobile netpack is also not very costly. The call quality is average, not much noisy but its clear. the main problem which I face is the network issue. most of the places.
I receive no network such as buildings, malls, hospitals where I can get the signal of other companies easily. also the network fluctuates a lot. many of the text messages I dont receive on time. So that is the only issue. it does not deducts any of the amount from my account as reliance does.