Vodafone is the best operator in India as I am using the same with airtel I e I have dual Sims and speed of the internet is much faster than airtel and even the signal strength is always full in Bangalore and if you go out of station ie when the network is roaming the signal strength is good but if you use the internet you won’t get that too after putting in the roaming and international roaming mode it’s not working other the network is awesome with so many good internet packs.