Tata docomo postpaid is one of the best mobile operator service.
I am using two postpaid connections of tata docomo
Both are working good
Always I get bill on time on my email
Their daily bill usage sms service is also very good
Internet packs of 3G are very low in cost against other providers
And their latest tata docomo app is like SONE PE SUHAGA. And now I can do most of the related transactions on my docomo app.
So its best.