As per my experience with Airtel network it's to bad services provider. Many of time call dropped there and in my area there is always network range problem I always facing problem like calls not come and when any one call me they told your voice is not clear please comes out in your home.
Postpaid billing plan to much high as compared to other service providers. When visit airtel store in my place they did not speak well. So, overall it's bad network service provider