Idea Cellular has introduced a special tariff voucher of Rs.14 for its prepaid consumers in Chennai and Tamil Nadu, to make local and STD calls to any number (mobile or landline) at 30 paise a minute. It has also introduced another plan offering 30 p/min on Idea-to-Idea STD calls across India for a month on a recharge of Rs. 33, says a release. — Corporate Reporter