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California: Smartphones to come with 'kill switch'

27 August 2014 Last updated at 09:25 BST

Over three million smartphones were stolen in the US alone in 2013.

Now, a new law means that smartphones in California will be required to come with a "kill switch" to render them useless if lost or stolen.

However, experts have questioned whether it will solve the problem.

Richard Taylor reports.

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