Unlock car with cell phone

I'm an FCC licensed radio tech and have a hard time believing the unlocking feature can work because my understanding is the key fob is a radio transmitter utilizing different sub-audible tones to activate a certain function such as the door unlock, trunk unlock, and emergency horn. RF waves cannot be transmitted over the air through a cell phones audio system.

I searched www.snopes.com to see what it had to say. Here is the article

http://www.snopes.com/inboxer/household/cellphones.asp

Sorry brother Speedy but I think you just got one of those fun e-mails that people with too much time on their hands make up.:-\"