Tata docomo is very bad mobile operator .there are no good services and no advantages of tata docomo.it is most worst network of tata docomo .there are no more towers of tata docomo so network problem is a biggest problem of tata docomo.charges and billing are good but it does not matter because of its poor services .customer services are nothing there for customers.overall tata docomo is a worst mobile operator .and it is not used by more customers because of these disadvantages.flop.