My secondary sim is airtel and trust me the internet speed is pathetic and network gets lost anytime, in between a call or in between a meeting anytime.
The package cost is almost the same for all brands be it jio or voda or airtel, the internet speed of jio is way better than airtel.
I have my office in basement where jio network comes though a single line but calls can come on the other hand as I move to the basement all the tower of airtel gets lost and I cannot receive any call.
I am planning to switch my connection from airtel to jio only I dont know I can do that or not as my airtel no is given to a lot of places.
I If you are planning to buy an airtel sim please dont as they have the worst network connectivity.