Airtel is the one of best network provider to indain people. I am using airtel from past 8 year I didnt get any problem with the network but compared to the other operators the offers are less and more expensive. see if you consider vodafone they will give 2gb 3g data for 250 but in airtel they give only 1gb since vodafone uses same airtel 3g network so tht there is no vary in the speed . hence I will suggest airtel to give more offers regarding internet . all and all airtel is best sim to buy for .