I am using Vodafone for last 3 years . I subscribed to it because I was not satisfied with the services offered by Airtel and Reliance which I have used earlier. What can I say about vodafone. I have subscribed to vodafone blackberry plan and they have just great service - so helpful and friendly and they gives a call once in a while to check the service levels and for feedback. Hope their service levels wont deteriorate and I would recommend vodafone to anyone who is looking for a new connection
The only other non vodafone service that I am currently using is a datacard from reliance and I hope they will launch that service as well.