How to Unlock Your Car Using a Cell Phone
Senior Member
Joined: Feb 2007
Posts: 593
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From: N.E. Iowa
Here you go......might try this as well. You could probably unlock your vehicle from miles away with this method. 
http://www.autoblog.com/2007/06/01/v...ur-head-silly/
I like this guys comment:
"You mean I can increase the range of my car remote AND look like a total buttface at the same time?!?!"
http://www.autoblog.com/2007/06/01/v...ur-head-silly/
I like this guys comment:
"You mean I can increase the range of my car remote AND look like a total buttface at the same time?!?!"
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Joined: Dec 2004
Posts: 891
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From: Lost some where in the middle of the Ozark Mountains!
Originally Posted by KSUWildcat
I know a couple that tried it and told me it worked. I had to hear this, so they told me how they went about with their little experiment. The wife went to the car and had her husband call her on the cell while she held it up to the door, he pressed the unlock button on his remote and viola! the car unlocked.
I suppose it would when he is in the living room looking out the window at the car in the driveway.
I suppose it would when he is in the living room looking out the window at the car in the driveway.
Senior Member
Joined: Jan 2000
Posts: 2,075
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From: Central Florida
Your remote works on RF (radio frequency). RF cannot travel over cell phones. That's like saying you could open your garage door over a cell phone or turn your TV on over a cell phone (if you have an RF remote).
Think about it for at least 2 seconds and you will realize that it is impossible.
Think about it for at least 2 seconds and you will realize that it is impossible.
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Joined: Dec 2004
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From: Lost some where in the middle of the Ozark Mountains!
Originally Posted by BlueFlareside
Your remote works on RF (radio frequency). RF cannot travel over cell phones. That's like saying you could open your garage door over a cell phone or turn your TV on over a cell phone (if you have an RF remote).
Think about it for at least 2 seconds and you will realize that it is impossible.
Think about it for at least 2 seconds and you will realize that it is impossible.
Alright thought about it for a split second then contemplated on it for a while.
Since both cellular service and land lines are both also an RF signal. Once carried by air the other by wire. Since it is possiable to carry data over a radio frequency. (that is how the cell phone works, as well as the remote to the truck, plus also the tv remote, the tv it's self, radios, satelites, wifi etc etc etc.)
While it is unlikely and high unprobable that the information from the key fob would jump to the phones RF, and stay intact through the phone network(s) then be broad cast from the celular tower and the signal be strong enough so that the vehicle could intercept. Plus that the portion of the cellular RF that had that information happened to match the bandwidth close enough that the antenna on the vehicles remote picks it up and gains enough of the data to unlock it......
While all of that is extremely unlikely, I'm talking eleventy kabiliion to a .5 chance. It is not impossible, just improbable.
All the elements are there for it to happen it's a matter if they all happened to line up at the exact right time.
Last edited by PSS-Mag; Jun 2, 2007 at 12:03 AM.
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Joined: Sep 2000
Posts: 568
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From: Tustin,Ca
This is too funny.
First your cellphone uses a vocoder to encode your voice and other sounds into a digital bit stream. It then transmits it to a cell tower reciever. from there it probably goes directly to a land line or handed off until it gets to a land line. It then gets sent to a cell tower on the phone on the other endand it is then decoded by that vocoder.
The vocoder only has a low frequency range for the vocal sound range. The land line won't carry 900 MHz RF. A typical vocoder only goes to 12 KHz.
Go ahead and try it. Just don't let anyone tell you it works. That is total BS and you should beat the crap out anyone who tells you they tried it and it works. Just tell them the fight was on your phone and it came thru, so they should not get too close. It might happen again.
First your cellphone uses a vocoder to encode your voice and other sounds into a digital bit stream. It then transmits it to a cell tower reciever. from there it probably goes directly to a land line or handed off until it gets to a land line. It then gets sent to a cell tower on the phone on the other endand it is then decoded by that vocoder.
The vocoder only has a low frequency range for the vocal sound range. The land line won't carry 900 MHz RF. A typical vocoder only goes to 12 KHz.
Go ahead and try it. Just don't let anyone tell you it works. That is total BS and you should beat the crap out anyone who tells you they tried it and it works. Just tell them the fight was on your phone and it came thru, so they should not get too close. It might happen again.
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Joined: Dec 2004
Posts: 891
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From: Lost some where in the middle of the Ozark Mountains!
Somebody try this....
Step out of range of your trasmitter, (Office, store, anywhere that you know it wont work) activate any function(s) 257 times (just push buttons but the total must be atleast 257 pushes) and tell me what happens when you get back to your truck.
Step out of range of your trasmitter, (Office, store, anywhere that you know it wont work) activate any function(s) 257 times (just push buttons but the total must be atleast 257 pushes) and tell me what happens when you get back to your truck.
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Joined: Dec 2004
Posts: 891
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From: Lost some where in the middle of the Ozark Mountains!
Originally Posted by canyonslicker
This is too funny.
First your cellphone uses a vocoder to encode your voice and other sounds into a digital bit stream. It then transmits it to a cell tower reciever. from there it probably goes directly to a land line or handed off until it gets to a land line. It then gets sent to a cell tower on the phone on the other endand it is then decoded by that vocoder.
The vocoder only has a low frequency range for the vocal sound range. The land line won't carry 900 MHz RF. A typical vocoder only goes to 12 KHz.
Go ahead and try it. Just don't let anyone tell you it works. That is total BS and you should beat the crap out anyone who tells you they tried it and it works. Just tell them the fight was on your phone and it came thru, so they should not get too close. It might happen again.
First your cellphone uses a vocoder to encode your voice and other sounds into a digital bit stream. It then transmits it to a cell tower reciever. from there it probably goes directly to a land line or handed off until it gets to a land line. It then gets sent to a cell tower on the phone on the other endand it is then decoded by that vocoder.
The vocoder only has a low frequency range for the vocal sound range. The land line won't carry 900 MHz RF. A typical vocoder only goes to 12 KHz.
Go ahead and try it. Just don't let anyone tell you it works. That is total BS and you should beat the crap out anyone who tells you they tried it and it works. Just tell them the fight was on your phone and it came thru, so they should not get too close. It might happen again.
The key fob is only sending 40 bits. Unless my math is waaay off, I think the vocoder could handle the data from 1400 key fobs on one wave.
My only draw back was that the vehicle would actually be reciving the signal from the cellular tower and the likely hood of the vehicle being able to capture 850mhz-1.9ghz would be astronmically slim. The myth would be asking the cell phone at the vehicles location to act as a repeater. If the data from teh key fob reached the phone then the phone would be reciving the data from the key fob, but it would not be rebroadcasting it.
Then I thought of one variable that would increase the odds. Still slim to non but slight increase.
If the cell phone at the cars location is hearing aid compatable then it has a telecoil. A telecoil changes the audio wavesand broadcast them as an electromagnetic field to be picked up by the hearing aid. So infact the cell phone ear piece is transmitting the data and could act as a repeater. If the 40 bit data from the key fob happened to be riding on that signal and the computer happened to recive it then it would indeed unlock the car.
Still eleventy kabilion to 1 chance, but thats twice the odds as I first gave the myth
Last edited by PSS-Mag; Jun 2, 2007 at 11:49 PM.
Senior Member
Joined: Sep 2000
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From: Tustin,Ca
Originally Posted by PSS-Mag
12Khz is more than enough to carry 56,000 bits of data (aka 56K dial up)....
The key fob is only sending 40 bits. Unless my math is waaay off, I think the vocoder could handle the data from 1400 key fobs on one wave.
My only draw back was that the vehicle would actually be reciving the signal from the cellular tower and the likely hood of the vehicle being able to capture 850mhz-1.9ghz would be astronmically slim. The myth would be asking the cell phone at the vehicles location to act as a repeater. If the data from teh key fob reached the phone then the phone would be reciving the data from the key fob, but it would not be rebroadcasting it.
Then I thought of one variable that would increase the odds. Still slim to non but slight increase.
If the cell phone at the cars location is hearing aid compatable then it has a telecoil. A telecoil changes the audio wavesand broadcast them as an electromagnetic field to be picked up by the hearing aid. So infact the cell phone ear piece is transmitting the data and could act as a repeater. If the 40 bit data from the key fob happened to be riding on that signal and the computer happened to recive it then it would indeed unlock the car.
Still eleventy kabilion to 1 chance, but thats twice the odds as I first gave the myth
The key fob is only sending 40 bits. Unless my math is waaay off, I think the vocoder could handle the data from 1400 key fobs on one wave.
My only draw back was that the vehicle would actually be reciving the signal from the cellular tower and the likely hood of the vehicle being able to capture 850mhz-1.9ghz would be astronmically slim. The myth would be asking the cell phone at the vehicles location to act as a repeater. If the data from teh key fob reached the phone then the phone would be reciving the data from the key fob, but it would not be rebroadcasting it.
Then I thought of one variable that would increase the odds. Still slim to non but slight increase.
If the cell phone at the cars location is hearing aid compatable then it has a telecoil. A telecoil changes the audio wavesand broadcast them as an electromagnetic field to be picked up by the hearing aid. So infact the cell phone ear piece is transmitting the data and could act as a repeater. If the 40 bit data from the key fob happened to be riding on that signal and the computer happened to recive it then it would indeed unlock the car.
Still eleventy kabilion to 1 chance, but thats twice the odds as I first gave the myth
My point I am making is the device that actually encodes the signal to digital. It just won't decode anything above 12 Khz. A good thing too otherwise you would be hearing all kinds of crap like when you play a data disc on an CD player.
The signal that gets encoded is only in the audible range. Nowhere near the RF region.
Now this thing might work with very a old TV with the old audible remotes that would make a "tink" sound when you pushed the button.
God I must be dating myself and yes I used to even own a 4 track tape player when 8 track was the next greatest craze. I still have a LaserDisc player somewhere.
Oh well I used to work on the technical side of cellphones for a few years and I know exactly how they work.
There is not even an eleventy gabillion chance it would work. So believing it had that chance. I think you need to beat the crap out of yourself and blame it on the cellphone.
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Joined: Dec 2004
Posts: 891
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From: Lost some where in the middle of the Ozark Mountains!
Originally Posted by canyonslicker
I won't go into the math or the various modulation schemes and their limitations. It would take quite awhile.
My point I am making is the device that actually encodes the signal to digital. It just won't decode anything above 12 Khz. A good thing too otherwise you would be hearing all kinds of crap like when you play a data disc on an CD player.
The signal that gets encoded is only in the audible range. Nowhere near the RF region.
Now this thing might work with very a old TV with the old audible remotes that would make a "tink" sound when you pushed the button.
God I must be dating myself and yes I used to even own a 4 track tape player when 8 track was the next greatest craze. I still have a LaserDisc player somewhere.
Oh well I used to work on the technical side of cellphones for a few years and I know exactly how they work.
There is not even an eleventy gabillion chance it would work. So believing it had that chance. I think you need to beat the crap out of yourself and blame it on the cellphone.
My point I am making is the device that actually encodes the signal to digital. It just won't decode anything above 12 Khz. A good thing too otherwise you would be hearing all kinds of crap like when you play a data disc on an CD player.
The signal that gets encoded is only in the audible range. Nowhere near the RF region.
Now this thing might work with very a old TV with the old audible remotes that would make a "tink" sound when you pushed the button.
God I must be dating myself and yes I used to even own a 4 track tape player when 8 track was the next greatest craze. I still have a LaserDisc player somewhere.
Oh well I used to work on the technical side of cellphones for a few years and I know exactly how they work.
There is not even an eleventy gabillion chance it would work. So believing it had that chance. I think you need to beat the crap out of yourself and blame it on the cellphone.
I'll be sure to go beat the crap out of myself....