Vodafone’s network in Delhi NCR is good. Their tariff plans are far better than Airtel. However, they should work on their customer service in call centers. Vodafone store service is good. I have been using Vodafone since year 2006 and do not regret for the same. It was vodafone which started combo or bucket plans which had data and free calls within the same monthly rental. Wish the service remains the same even after their merger with Idea.