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It looks like it will be universal, but it isn’t mandatory. All of the major carriers have agreed to this measure, and most of the handset manufacturers, although I did notice that LG was missing from the CTIA press release. Let’s face it, stolen phones generated a lot of revenue for carriers and helped sell a lot of insurance plans. CTIA's position started to change only when people begin to catch on that not only was it easily possible to add a “kill switch”, some carriers were actively disabling kill switches on the few phones that had them. Carriers tried to say they were opposing kill switches to protect customers, but people are not that stupid, and there was finally a push for federal regulation to mandate kill switches. For a business, voluntary compliance is always preferable to legally mandated compliance, after all if they don’t do it properly there is no penalty provision if compliance is voluntary. This is a win for everyone except theives and their passive partners, the carriers.