Facebook to invest USD 5.7 bn in Reliance Jio. Mark Zuckerberg’s Facebook will buy a 9.99% equity stake in Ambani’s Jio. The social media giant targets India’s digital customer base of 1.3 bn users. Facebook also aims to get a foothold in India’s potential SME market. This is the largest FDI in India’s technology sector. Reliance and Fb had agreed to let Reliance Retail use WhatsApp for commercial purpose.