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Prompted by concerns about a proliferation of illegal and untraceable SIM cards, the directive is the most visible step so far in Pakistan's efforts to restore law and order after Taliban militants killed 150 students and teachers at a school in December. Officials said the six terrorists who stormed the school in Peshawar were using cellphones registered to one woman who had no obvious connection to the attackers.
In major cities, the Wi-Fi-first network makes sense. People use smartphones frequently while sitting around their offices and apartments, and Wi-Fi can handle the job just fine. But once people start moving around, it is not so simple. The benefit of a cell service is that your phone can switch among multiple towers while you are on the go which wi-fi is not designed to handle. Google may be experimenting with a hybrid approach similar to the small companies'. A person briefed on Google's plans, who spoke on the condition of anonymity because the conversations were private, says the company wants to make use of the fiber network it has installed in various cities to create an enormous network of Wi-Fi connections that phones could use to place calls and use apps over the Internet. In areas out of reach, Google's network would switch over to cell towers leased by T-Mobile USA and Sprint. Still many wonder if even the biggest companies could make a Wi-Fi-based phone network work. "There are just so many places where Wi-Fi doesn't reach," says Jan Dawson "and the quality of Wi-Fi that you can find is often subpar."
ACLU lawyer Nathan Wessler says, "What is most egregious about this is that, in order for local police to use and purchase stingrays, they have to get approval from the FBI, then the FBI knows that dozens of police departments are using them around the country. And yet when members of the press or the public seek basic information about how people in local communities are being surveilled, the FBI invokes these very serious national security concerns to try to keep that information private."