 Network i2i has sold 23.1 million shares in Helios Towers at 1.6 per unit, amounting to a 2.3 stake in the UK tower company. The Helios stake sale proceeds would be used to retire Airtels debt. The latest stake sale comes on the heels of Bharti Telecom, the promoter company of Bharti Airtel, raising Rs 8,433 crore 1.15 billion last month by selling a 2.75 stake in the telco to multiple global investors. 