The document discusses how low-cost smartphones have enabled widespread use of mobile apps in India. It notes that 40 million Indians access the internet through mobile phones, with 30 million mobile app downloads per week. Most users are aged 18-29. Smartphones have benefited job portals, travel portals, social networking, the film industry, advertisers, e-commerce firms, and government and banking sectors by allowing them to reach a broader customer base. The smartphone revolution untaps rural markets and encourages businesses to diversify into e-commerce.