There are countless communication options, including Yahoo's new Livetext app. Livetext allows users to send a message accompanied by live video but no audio. James Boast/Getty Images/Ikon Images hide caption

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The Google logo is seen at the Google headquarters in Brussels. This week, Google is changing the way its influential search engine recommends websites on smartphones and tablets in a shift that's expected to sway where millions of people shop, eat and find information. Virginia Mayo/AP hide caption

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More than 600 Porto city buses and taxis have been fitted with routers to provide free Wi-Fi service. It's being touted as the biggest Wi-Fi-in-motion network in the world. Sérgio Rodrigues/Veniam hide caption

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Nuala O'Connor, president and CEO of the Center for Democracy and Technology, testifies on net neutrality issues before the Senate Judiciary Committee on Wednesday. Win McNamee/Getty Images hide caption

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Teachers are incorporating mobile technology and a digital sensibility into classroom lessons with assignments such as this one: to caption a historical photograph for teacher Nicholas Ferroni's high school history class in Union, N.J. Courtesy of Nicholas Ferroni hide caption

toggle caption Courtesy of Nicholas Ferroni

Employees of a petroleum company in Liberia help to curb Ebola's spread via a public health awareness campaign Monday. West Africa is facing its first Ebola outbreak, so questions abound. Abbas Dulleh/AP hide caption

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Inspector Mohammad Saleem Taqi takes a photo of sanitation workers as they clear out debris in sewers. The government feeds the photos into a map to track the city's effort to stop dengue fever. Beenish Ahmed/NPR hide caption

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Nokia was the only large phone manufacturer in the world to commit to selling phones running Microsoft's operating system. Now Microsoft is buying Nokia's mobile phone business. Timothy Clary/AFP/Getty Images hide caption

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Men look at mobile phones at the Adjame market in Abidjan, Ivory Coast. The market for mobile telephones in developing countries has grown quickly, and now Facebook and Google are trying to get users to use the Internet on their devices. Issouf Sanogo /AFP/Getty Images hide caption

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A phone booth serves as a free Wi-Fi hot spot in New York City's Columbus Circle. Anna Solo/ hide caption

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