There are many Mobile Operator present in the Indian Market but I’m sure vodafone is very best mobile operator, its my personal experience for 8 year’s(2009 to till now), it’s better network provide you to very clear sound on your phone call, it’s network strength is very good in both arias urban and rural. even on the mountain it’s work properly also internet speed of vodafone 3g/4g both are good.
Customer Service: Vodafone Customer service is very good its customer care executive are best and problem solving and very helpful executive.
Charges and Billing: vodafone provide service in both type, prepaid and postpaid. overall service of vodafone are very good but it is very costly compare with other mobile operators, it’s tariff plans is very costly.
Overall if you looking for a best mobile operator you can choose vodafone.