This one’s a hoot.  Imagine that your wife has locked herself out of her car.  She calls you on her cell because she knows that you’ve got your keys in your pocket.  Seems there’s an urban legend that you can hold your key fob up to your cell phone, click it, transmit the signal to through your wife’s cell and unlock her car.  AAA engineers put that urban legend to the test.  Turns out it’s bunk.  Myth busted. 

Of course if those engineers had asked anyone who knows that phones are deaf to signals in the frequency range in which key fobs transmit, we could have saved them the lab time.  Still, it’s kind of a romantic notion.  That’s all.