Keys

Have you ever locked yourself out of your apartment or lost the key late at night? Well, now there's a service that you can use by just keying in your entry code on your mobile telephone. An adaptor and electronic lock on the door will open with the right call. The company running the service is called 3D, and will start selling the electronic key and 1.2V battery-powered adaptor in June. The price is JPY4,000 for both the adapter and the key.
My problem is that if I stopped using regular keys and instead just relied on the adapter set, I'm sure that I'd forget the the cell phone, or run out battery power... What I really need is a microchip implant in the brain that can be scanned by my apartment locking systems and the TV!