Airtel is very old and popular indian mobile network company. I am using airtel sim from last 2 years. I brought this sim after using aircel sim. Aircel have very bad network. Airtel have very good network. I didnot see any disturbance in network. In parking the the network become half but not out of network. The packages of the airtel is very cheap and attractive I always recharge @149 in which I get UL calls and 1GB data per day 28 days. The speed of the internet is very good I saw maximum airtel 4G speed was 66 mbps. But the bad thing about its upload speed of internet its below than 1mbps the messages picture and videos does not send. It takes too much time. But still it is my favourite network.