Airtel is the best mobile operator I have use this sim almost 10 year ago its good.the network of this sim is very strong every erea have a airtel network but after popularity it rise our call rate so I little disappoint but it have a many many tariffe to cut the rate call it is also a one of the best old sim in india it also give a 100 mb 3g data to dial 129 and put the sim no 1 in smart phone. today I am also use this sim its realy realy good to any location the 3g speed is outstanding but the 3g data plaine is very expensive