Vodafone is a nice network to use mobile, because vodafones call charges and tariff plans are cheap in front of airtel.tata docomo ect.if you want to use 3g services on your mobile you should use vodafone prepaid plans which is very cheap.you have to go to my offers by dialing*123#.which gives you the best offers available for you ton tariffs rates, 3G services, 2G services and full talktime services, i have used vodafone from last 2 years.
I am happy with the tariff plans in comparison to other mobile network plans.I have tat docomos number but its tariff is more in comparison to vodafone, if you need 3G plans for 28 days and good speed and good data you should go and try vodafone.In vodafone you also get 1 day packages, li98ke 15 paise calling vodafone to vodafone for 1 day in just rs 5, vodafone has also launched 4G services which I think would be awesome as 3G and would be cheap in compared to airtel 4G