You know airtel is tha largest network provider in india .And it is so costly but you know costly product is perfect for us in any area .
Airtel is only telecom company that gives you a own service by using ussd code. Before some time ago airtel make an android app like my airtel app for his customer for recharge , for airtel money, for any offer running in your airtel number, for take a new postpaid plan by yourself and so on .the size of my airtel app is 5.9 mb approx and it is not more. this app is easy to use for us.