I am using vodafone since it was bpl mobile i.e. 2008.
Eversince it was giving best service although at high price.
Recently however using vf is a headache. Furst of all it is a myth that it works everywhere in india , go to madhya pradesh and then u would realise how pathetic it is.
Second even in cities, u wont get 3g connectivity inspite u buy a 3g plan. They r just lacking in that commitment. To some it up its not now worth to spend money on vf.