@vignesh_venkatesan i was travelling in train around Coimbatore,Salem, Erode Vodafone was good with CA Band 3 10+Band 1 10Mhz
TBH Jio is better in Chennai than other networks Airtel is congested in Chennai like Jio in other places and Vodafone Idea is good in some parts of Chennai where the networks are merged and other places network fluctuates a lot.Its a bad situation to be in. In some areas, Airtel is horrible in Chennai, so some people are sticking with Vodafone and in fact they are asking if Vodafone is better and whether they can jump to Vodafone - I am not sure what to say any more