I was a Tata Docomo customer in Aligarh uttar pradeshl but after taking this Tata Docomo SIM I am using it within even 1 month you know why? So I wrote a email to customer care.same response.and nice trick the customer care guy called me . Since few months I am getting zero network on my phone.I am using Tata Docomo network on my mobile phone since 4 years This network provider is just terrible like wherever you go even if you go to your own house they would not be any network you have to go to the roadside make a call and you can’t even receive a call when you are at home I have also use many other sim cards like Vodafone Idea Airtel and much more but really I have not seen this horrible network in my life before and their Customer services are horrible too! And they would be deduct money anytime just by saying you have used Internet or you have made a call or anything they are just unbearable and I would not recommend this service to anyone else please stay away from Tata Docomo that’s all thank you!