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With 96 percent of the world connected, organizations are using mobile phones to deliver, via texts, water, energy, financial services, health care, even education.

“The number of such initiatives seems likely to increase. “The development community is eager to learn more about how to use mobiles effectively,” said Nick Martin, a founder of Tech Change, a social enterprise based in Washington that educates development practitioners via online courses.

Mr. Martin said his most popular course has been Mobiles for Development. In the last three years, TechChange has taught the course eight times to nearly 400 participants from over 60 countries.”