Airtel is a good option among all the networks. no doubt you will get a very nice network coverage due to which I choose this network. I have a sim of airtel being used for more than 10 years. though it is a bit more expensive than other operators but still it is worth it.
It will never leave you with no signal. its internet speed is also wonderful.I am totally satisfied with this network an would strongly recommend everyone for this network with no doubt.