Telecom regulator, TRAI on Monday allowed operators to provide new kind of recharge coupons for pre-paid connections that will provide dual benefit to consumers. The new Combo vouchers will enable mobile phone subscribers to add monetary value to their prepaid balance, as well as get benefit of special tariffs through a single transaction instead. Earlier rules allowed only three categories of vouchers, namely Plan Vouchers that enrols a consumer into a tariff plan, Top-up coupons for adding monetary value in to pre-paid account of consumers, and Special Tariff Vouchers for getting value added services or discounts on services. Telecom operators will also have to provide option of standalone top up vouchers along with combo vouchers. The regulation says that Combo Vouchers will clearly have to mention the terms and conditions so that subscribers can make an informed choice.