I got one Tata Docomo mobile sim with my tata docomo dongle. The experience was really pathetic. Most of the time mobile signal was poor. For every call you will experience at least one call drop. The voice data clarity was also very poor. I had also a very bad experience with the Tata Docomo customer care service. I placed one problem ticket to customer care but they were not able to resolve my issue and asked me to go to Tata docomo outlet to resolve the issue. Even the outlet people were also not able to resove the issue. Finally I surrendered both the dongle and mobile connections.
If you people do not have any alternative option other than Tata docomo for selecting your mobile operator then also please do not opt this mobile operator.