Now what tell about tata docomo network, as everyone knows that the network comes when come, then it does not come or else it has to catch on the roof of the house. Go from one city to another, then shows roaming on mobile screen. The village, farm, mountain expanse, as such a place, it does not get its network.
Customer service is absolutely irresponsible. Those people do talk but all the work is going to be done as if the force is talking rigidly.
Charges and billing have little to do with their work, but not very cheap.