Rishi Yiengar, writing for CNN :
Jamna Devi got her first cellphone about a year ago. It’s one of those with a tiny screen and a numbered keypad, the kind that are becoming increasingly rare in the age of Android and the iPhone. Devi’s village in India’s Rajasthan state is almost completely off the grid. It’s a sleepy cluster of houses in the middle of the desert. There’s one bus a day that passes through, the only connection to the nearest city more than 50 miles away.