Reliance Jio, the telecom arm of Reliance Industries, offers a slew of prepaid plans with the choice of shopping for an extra IUC (Interconnect Usage Charges) top-up. IUC may be a cost paid by one mobile telecom operator to a different, when its customers make outgoing mobile calls to the opposite operator’s customers. Last week, Jio announced that it’ll charge customers 6 paise per minute for voice calls made to other mobile networks.