They are one of top mobile service provider but for me and for the area I do live there networks are never there . Being honest network with airtel is also not good in my area but with them they are super bad and it is no service most of the time with vodafone . IF you live in rajouri or in near area I will not recommend you to use vodafone because there towers are not anywhere near that is why network is always very low even on the streets .
I do recommend airtel even after having compaint with vodafone as they are still the best .