I am using airtel from a year I am happy as they are the best service provider.they are best because their network can be used from any side of india every place there is range so I like it for that.Customer service is the best they talk to us politely and respect us they help us in sim related problems they dont make us wait they work very fast.
The charges for airtel internet and calling are very higher prices because of jio which looks more cheaper bust the network is better than every sim.