Vodafone Essar today launched two new ISD Bonus Cards for its prepaid customers in Kolkata. These Bonus cards offer customers reduced tariff options to make outgoing calls to Bangladesh. Priced at Rs 36, Bonus card 36 allows customers to make outgoing calls to Bangladesh at Rs. 2.99 per minute. Whereas Bonus card 42, priced at Rs. 42 allows customers to make outgoing calls to Bangladesh calls at Rs. 0.06 per second. Both these Bonus cards come with a validity of 30 days from the day of activation.