What will a world without GPS look like? “Sab thapp ho jayega (Everything will stop),” replies Phool Singh Chauhan with a hearty laugh. “Young people completely rely on GPS locations and are clueless about the streets.” Chauhan, 39, has been driving taxis for the past 15 years, well before the smartphone revolution. He bought a car—Swift Dzire—a few months ago and has just begun working with app-based taxi services. Until May, he was employed with a traditional taxi-fleet owner.