Actually i bought one mumbai sim card and activated the STD pack RS.32 booster. but, the call charges of the booster is different than i thought. so, for iam in need of cancelling the booster contacted the customer care. i tried to speak with customer care executive for more than 10times, its telling when enter the option to speak, (just *121# for further queries, thank you for calling airtel) this is it. iam soo upset, the call charges of mine gone higher due to this booster. i really dont know how to cancel this..? read full review »