Theft of personal, digital devices is fairly rampant, but thanks to the introduction of kill-switches, those snatching the gadgets of others are now often left with a bricked product that cannot be used or sold at will. It's not much consolation to the victim, but it has made a noticeable difference to smartphone theft in that the numbers have dropped off significantly. Now, a new law has been passed in California that means by 2015, any handset sold in the state will need to be kitted up with its very own kill-switch, and although most top-end devices now ship with such measures right out of the box, this new move will ensure that all new smartphones include something similar.