I have used Tata docomo. due to some good offers I bought tata docomo sim but after some time I found Its service is not good. Call rates are high. Network coverage is very bad, call drop happens automatically if your call goes for a long time.I have raised many complaints to customer care but they did provide any solution. internet speed is very bad for 2g and 3g. internet plans are very coslty. if you go to rural area then you will not find any network, you can not make any call even in emergency.
you will get regular messages even you register DND.
I used this sim. its total waste of money . all time its cant give us a good network coverage .while travelling its network coverage disturbances is high.even at home too.
If you want to use high speed internet and want to chat with your friends it not right choice. don’t buy tata docomo sim please go for another service provider