Mukesh Ambani-led Reliance Jio continues to attract users at  breakneck speed – adding 16 million users in less than a month – Airtel,  the country’s largest telecom operator, is upgrading its wired  broadband network and reducing the cost of voice and data.   To attract new users, Airtel will provide unlimited data for free for three months.   Reliance Jio only provides high-speed wireless internet and is  offering unlimited free data to all its users until December and is  expected to extend the offer.        As part of its Rs 60,000 crore Project Leap, Airtel implemented  ‘vectorisation’ technology that allows it to deliver broadband speed of  up to 100 mbps without replacing the existing infrastructure. It will  change the modem at the user’s home at a one-time cost of Rs 1,000.   So far, this is the biggest technology upgrade in the wired broadband sector involving five million users.   India’s data consumption has risen rapidly as more people buy smart  televisions, use multi...