Reliance Jio may be busily trying to disrupt the Indian mobile market with its free promotions and data-only offers, but market leader Bharti Airtel will take a lot of catching. The company said it has deployed 180,000 mobile sites in the past two years, equivalent to the total number it rolled out in the previous 20 years. This scale of build-out is rare even in this era of densification and Airtel’s Project Leap – like rival Vodafone’s Project Ocean – should enhance the MNO’s business model more permanently than sharp pricing. Bharti Airtel now claims the widest 3G and 4G network coverage in India, reaching all the country’s 22 operating circles, and it has also been rated the fastest network…