Originally Posted by GR33N D3M0N
Actually, viper makes an iPhone remote start system, it basically calls the car to start it/unlock it...$500 system, $30 a month...
It doesn't call the car itself. It calls a module installed in the vehicle.
As manufacturers expand the vehicle management capabilities to smartphone applications (as some new vehicles have the ability to be managed via the phone), this will become possible, but will still require cracking the authorization codes or the owner's password. Regarding our Grand Cherokees, though, the only thing you can do with a phone is connect to the audio system via Bluetooth. You can't start it without doing some serious hacking. Considering how easy it is to carjack, you're better off just liberating the key from the owner.