Vodafone Idea (Vi) on Thursday said its board has approved raising ₹4,500 crore by issuing shares to its promoters on preferential basis. The firm will issue up to 3.39 billion shares at ₹13.30 a share, 20% premium to its current market price, to Vodafone Group's Euro Pacific Securities and Prime Metals and Aditya Birla Group's (ABG) Oriana Investments.