My own experince in airtel network all over good for other telecom service network.I found airtel is best I found airtel is best . network covrage good in all indiane village . you visit airtel.in officially site.now open airtel app lunch in airtel payment bank you have interst rate of 7.25%. .Internet mobile connection is awesome fast 3g & 4g service .airtel suppoter take our problems seriously and tries to solve it as soon as possible. So I rated them the best of all .if you any srvice starts you have pay & charge not more charge for internet, call, roming talk time for anothet service opeator .