i was a witness when my colleagues tried it. it did work with the given environment.
what one of my colleague did was walk away from the car until he can't open his car anymore with the remote keys. he then called my other colleague and had him put his cellphone near the car's hood. it did not work when he placed the cellphone at the car's door, but it did work when it was placed near the hood.
it was not really a controlled environment for me to say that this "truly" works. i am just giving an account of what happened, and maybe the distance that my colleague walk to is somewhere where the signal could be intermittent.
let me try this myself and give another feedback.
