Bharti Airtel is set to buy 4G network equipment worth around $1 billion (over ₹8,376 crore) from Ericsson, Nokia and Samsung over the next three years, Economic Times reported. The contracts are for 3 lakh additional 4G base station requirements, with Ericsson, Nokia and Samsung supplying around 50%, 45% and 5% of the equipment respectively, the report added.