First of all airtel service is very good.The internet service is also very good, I am using aitel 3G and I got the speed upto 500-1000kbps which is really appreciable, Other companies are not providing the real service like Airtel and also if you are using internet you will also know about the open network which is open by the airtel with this you can easily know about the towers in your location which is very impressive.You can easily found the build in towers in your area and also the signal strength.