According to me this is INDIA best mobile operator.
I have been using their services from last 14 years.
Talk about their network they are far much better than other brands. Whether it is basement or mountains you will get full network everywhere.
Every month they provide varieties of new plans to choose from.
The customer service is too good for every query to resolve.
You can choose best plan according to your needs.
One most important thing this month they started free International roaming from airtel to airtel