locked your keys in the car?

[beason]

I recieved this in an email today, seemed interesting.


Subject: Car Keys

Locked your keys in your car???? Did you know this??

If you lock your keys in the car and the spare keys are at home,
call someone on your (or someone else's) cell phone.

Hold your cell phone about a foot from your car door and have the
other person at your home press the unlock button of your key fob
(clicker), holding it near the phone on their end. Your car doors
will unlock. Saves someone from having to drive your keys to you.

Distance is no object you could be hundreds of miles away, and if
you can reach someone who has the other "remote" for your car,
you can unlock the doors (or the trunk!).

Editor's Note * It works fine! We tried it out, and it unlocked our
car over a cell phone!)
I have never (knock on wood) locked my keys in the car. I wonder if just the sound will do the trick. Will have to try it.


Mike's Note *

I locked the car had my youngest daughter call me while I was far away
from the car. I clicked open into the phone and I could hear the car
doors unlock through her cell phone.. My daughter confirmed that sure
enough the doors opened.

Pass this one on to your friends





:i havent tried this! can someone try it? i dont have a car with electric locks.

 

[HeartBreak]

I have an alarm with keyless entry. Somehow, I doubt it'll work (because the alarm has an actual antenna on it). It might work with other models tho. I can see it now.... A whole new line of that "can you hear me now" commercial.

 

[SMaxxin]

I have never tried that but I have locked my keys in my car/truck many many times LOL. The only good thing that came out of that is now I can get into most vehicles in under 20 seconds with a coat hanger.

That black is freakin hard to read on the Dark side

 

[itsme]

Dude it actually works i just had my bro call me from his house with my spare fob and sure enough my lights came on and the doors unlocked this freakin cool, nice find Beason.

 

[HeartBreak]

is the fob radio-frquency based, or is it ultrasound?

 

[Revo Rancher]

Must be freq based. The sounds capability of cell phone would net handle the freq of ultrasound. They are of very low audio quality. In fact, I am surprised it works at all. Also, a very few cars were/are infra red, so this will not work on those.

 

[itsme]

You know what I'm calling bullshit on myself i wanted to try this outside our neighborhood so we did and nothing, I'm thinking we were not out of the range of the receiver in my car, my bad! please go easy on me!, I'm going togo try this at a greater distance.BRB

 

[ZANDOR]

I Just did it on my neighbors car and it worked from across the street me being inside my house
And this was on a 2005 thunder bird

 

[jetmechG550]

Man that's been going around for years! Just don't work.

 

[ZANDOR]

Man that's been going around for years! Just don't work.

...
I just did it! Itsme and I are going to try it tomarrow from a few miles away.

But it did work on the 05 bird Hands down.onder2:

 

[truthseeker]

man that is weird. keyless entry usually operates on 315 mhz in the u.s. that's absolutely not going to be picked up on the audio side of a cell phone. the 315 mhz signal must be piggybacking on the cell signal. the fobs are usually kind of an on/off coded pulse so it's not a very complicated signal. strange phenomenon. i wouldn't bet your life on it, though.

damn, thats a nerdy post, eh?

 

[itsme]

Our remote door lock keychain remote works by emitting a low-power radio signal to a receiver in our car. The signal is encrypted specifically to work with our vehicle and is very hard to duplicate. Cell phones use a higher-powered and higher-frequency radio signal (800 MHz and up, whereas our remote locks operate between 300 and 500 MHz). Cell phones transmit voice and data – they cannot "carry" other radio signals I'm A DUFUS!

 

[ZANDOR]

Then how did it workonder2:

 

[4u2nv]

it work for me too. (I had to go try it as well) and that was on a 2000 Chevy 2500 truck. Tomorrow I'm gonna try it from up town 3 miles away..lol.. (Id do it now but its to fricken cold out..lol)

 

[Revo Rancher]

man that is weird. keyless entry usually operates on 315 mhz in the u.s. that's absolutely not going to be picked up on the audio side of a cell phone. the 315 mhz signal must be piggybacking on the cell signal. the fobs are usually kind of an on/off coded pulse so it's not a very complicated signal. strange phenomenon. i wouldn't bet your life on it, though.

damn, thats a nerdy post, eh?

That and itsme's follow up post just after explains a lot. If anything, Zandor, it might be "fielding" the extra transmission range of the phone antenna to get the job done to get a slightly extended remote range, I dunno...

Well, off to e-mail "Mythbusters" with this one!

 

[truthseeker]

now it is possible that a cell phone could transmit a 315 mhz signal if that signal got into the front side of the output amp. it should have all kinds of filtering to prevent that, but i've seen it happen on various kinds of RF equipment. "piggyback" was not the best word to use, i guess. regardless, the chances are freaking slim to none of it happening.
i would say that across the street isn't far enough away to really test the theory. somebody needs to drive at least 1000 feet away to know for sure.

 

[Revo Rancher]

OK, TS, I'll see you in three days and I'll bring my Denali keys and then call my wife...

 

[truthseeker]

bring some dragonfly flies too. it's almost warm enough to fish again. oh yeah, how you gonna get here if you leave the truck at home? i'm not pickin your ass up!

 

[Revo Rancher]

I'll be bringing my home away from home...

And, TS, I am doing some research on those flies. I have never tried anything like a dragonfly. My book has none (?) in it so I am searching the net for an instruction on what materials (fur, feathers, threads) I need for your fly.

 

[beason]

revo what are you doing with truths fly??

oh and if your makina trip to texas you BETTER come see me to. i likfe 6 miles from truth!