U.S. prosecutors call for phone makers to install a “kill switch” to discourage smartphone theft. Apple and Samsung will provide handsets whose security features will be put to the test. The smartphones will be tested for security features and “attempts will be made to circumvent” anti-theft features. The initiative is part of the “Secure Our Smartphones” initiative announced in June. Around 30 percent to 40 percent of all robberies are smartphone theft, according to prosecutors. About 1.6 million people were victims of smartphone theft in the United States last year.”]