Vodafone is a good cellular network provider through out India.
3G have been implemented very well
Have their Vodafone mobile Connect
Have their own calling cards for US calling in special offer charges
I went to J&K over their also coverage range was at the max when others cellular network
struggle.
I am using the number from the Vodafone from 2004 last 12 year they have evolved according to the customer need.
They were first as I know known as orange then hutch then Vodafone.
I have worked for the Vodafone Company as a sales executive in the summer vacation
too.
Hence have seen the process of the service and support they provide to the customer and how they keep up .
They also have a mentor who visits the Vodafone Stores who keeps the check on the service the Vodafone Store provide.
You can check the pricing of the call cost on their web site Vodafone.in