Hello I'm going to share my experience with with tata indicom operator.
My mother use tata indicom network and let me tell you its is the worst network ever. The network is never full we live in a city and I habe never seen more than two singnals on my moms phone.
There is alsso a problem when I tried to find my phone in my home by calling from my phone I received a msg that it was out of reach . And sometimes when you call on your friend or any number it will dial someone else but the number will be same thts weird.
And when we go to our farm house her phone shows no signal om the other hand other company have full signal.
There data packs rates are so high.
Im going to port it on idea now. And will not recommend this.