What the world really needs right now is … a way to prevent unauthorised use of mobile phones! Well, never fear – DoCoMo NTT are on the case, and have developed a phone that will lock itself up if its owner strays more than a few meters away from it. And here comes the clever bit: the phone will know where its rightful owner is because they’ll be carrying a smartcard that the phone can detect via Bluetooth! Pure genius – that’ll never be hacked, and no-one would ever lose a credit-card sized bit of plastic, would they?