One of the most expensive telecom operator in india.signal strength is very good all over in india but calling rate, data charge, sms are too expensive for common people living in india.airtel is one of the trusted network but the cost of its services makes people cry afterall communication and other services are excellent internet speed is very fine in all over india and also the first telecom network who covered india with its 4G service I would prefer to use airtel mobile operator because of its network strength all cities and villages in india are covered by airtel telecom network.You should try