Let's play Mythbusters!

I would stake a thousand quatlous on this being complete bunkum...

Maybe if the key worked on audio it might work.

The microphone on a phone isn't going to pick up anything above about 15-20khz and that is probably being generous...they are designed to pick up speack so probably cut off quite low.

If I felt so inclined I could probably think of another 'n' reasons why it is daft.

Del

Caveat - The person on the cell phone is standing next to you near the car.

What if the microphone and speaker were piezo devices and responded to a few hundred KHz or more? Naw. I think it's rubbish too, but instead of talking about it, everyone should try it - would only take a few minutes - then we'd know. Darn, I was hoping to use that idea one day. Regards John

I think your kiloquatlous is/are safe - I've never heard of an audio keyless entry system, they're RF, and far from cell phone frequencies.

Personally, I never lock my car. Anyone who wants in that bad will break a window, and they cost too much to replace. Then, I'm not only out what they took, but the price of the window installed too. I just don't leave stuff in it that would tempt theft.

"while you hold your phone towards your car...viola. door opened from remote location."

Somebody was behind the grassy knoll with a third RF key.

I tried it the other day and it did not work. my phone was the away station.

I was thinking it, one can prerecord it as a ring tone.

Even better if one can install it under a voice tag. Imagine saying sh...t and beep beep open the locks.

On a positive note

I have Bluetooth on my cel and a budgie ear piece, then I have a Bluetooth / USB adaptor in the PC. Nice for downloading photos when I can't find the USB cable and download SMS's (all 3 of them). A Bluetooth in the car should work.

I also have infra red but nowhere to use it (my prehistoric laptop use floppies).

one can prerecord it as a ring tone

'Did that once upon a time.

While attending a seminar in a room that was right beside the parking lot, my phone sounded off (forgot to put it on silent mode). Several heads turned towards the windows .

Bhankii, this is from an old email chain letter, it is total rubbish...

Please see this link for a true explanation of chain emails...

www.breakthechain.org/

John.

I'm seeing a lot of exposition, but no experimentation.

No cable TV show for you!

What is there to experiment Bhankii?

It will not work full stop!

John.

Go back and read the link you provided. It provides plenty of evidence that people have made this work. Your job, as a Mythbuster is to try to make it work, and only after exhausting all your good engineering skills on it, then declare it a fraud. Talk is cheap.

Ahh, this old chestnut.

http://www.snopes.com/autos/techno/keyless.asp

Busted!

I still like the Mythbusters episode that involved unlocking a key-lock car door using a half of a tennis ball placed against the lock and hit, creating a pressure difference (and popping the lock). Oh people will believe anything they see on You Tube. This was busted also. No prizes for guessing how they faked the video of this "key-less entry device" working.

And back to you Jamie.

snopes:

It's possible this method might work with cars that use something different than standard RKE systems, but it doesn't work with the vast majority of models.

That's still not a categorical "no".

I guess there's no Mythbuster spirit in this group. Where's the pyramid guy?

How about rather than trying it you have a close look at how the key-less entry transmitter and receiver work, and how the cell phones work. You may be able to find a solution that may just do the trick (with a specific car alarm and a little modification of course).

Personally I would just boost the amplification of the key-less entry transmitter so that only the horizon was the limiting factor in the range. The more practical side of me says, just have a spare transmitter handy.

Let me know if you can prove it will work (and by prove I mean not have someone stand within key-less entry transmitter range of the car while using the cellphone to (supposedly) open the car, which is where I believe the confirmation came from in the first place).

It works, but only works if the person over the phone is within the emitter range from the car.

Mine works almost every-time.

It almost worked on Monday.

It almost worked on Tuesday.

It almost worked on . . . . .

There are certain areas where my key fob won't work at all, like my Drs office parking lot, let alone over a cell phone. Personally keyless entry is one option I could do without on my car.

The only thing that comes out of a telephone receiver is sound. If the keyless entry system operates on sound waves (which I have never heard of one that does) then there is a possibility that it would open the door over a telephone line. Other than that, I would conclude that the myth has been busted!!

Mine worked ( 2006 Chrysler 300 ) Just hooked the door locks to a CLAPPER-- "as seen on TV". CLAP ON-CLAP OFF. Clap lock-clap unlock.

If, in fact, you did, indeed, hook your Chrysler door locks to a clapper and it succeeded in unlocking the doors, then re-read my comment #23. You have just proved it. The clapping is sound. Right?

Seems like after all is said and done that it's easier to carry a spare key in the wallet or purse.

The concept is not unworkable except in this example it is unlikely to succeed...

It is unlikely that the audio part of the cell phone would pick up and send the key code. The rf signal from the key transmitter could be picked up by the rf stage in the cell phone. If this interference was then transmitted, the code could be transmitted, possibly as breaks in the carrier. On the receive end, the if stage could transmit the code to the keylock.