I have been using airtel since 2012 but there was not a problem but when I came to mathura region I realized the network coverage is not that good in the outskirt of this city. I recharged my phone with the 4g unlimited pack but the 4 g network isn’t available here. And most of the times it shows the edge network. So i’m a bit disappointed with this. And also sometimes there is a problem of call drops in the village region. It works well inside the city but airtel should look after increasing the network coverage.