How To: Unlock a Car Door Using a Cell Phone and a Faraway Keyless Remote (Faux-To?)

Unlock a Car Door Using a Cell Phone and a Faraway Keyless Remote (Faux-To?)

What if you forgot your car keys and that keyless entry remote banded to them, how are you going to get in your car? Well, if you haven't forgotten your cell phone, too, you can call up someone who has access to that keyless remote, so you can unlock your car or truck via the wireless mobile phone! What?!?

Yes, supposedly, with two phones and the keyless remote, you can unlock your car by having the person who has the remote press the button over their phone's microphone, which transmits the sound to the person's cell phone at the locked car, therefore unlocking the door because of the radio signal.

Okay, this sounds ridiculous. Faux-to? But is it? You be the judge. Whether it's real or not, one thing's for sure— it still doesn't help you when it comes time to driving home.

12 Comments

Call car's nearby From pesron who have remote....!!

Did't work with two phones , one at the car, the other two miles away,used speaker phone on both.... 2017 jeep

will it work on my 2003 ford Taurus? and i have an Android Smart phone 4 ???

I am an ASE certified auto technician. This is bull oney! IURBAN LEGEND !!! The wireless transmitter does NOT use sound. It uses infrared (IR) or Radio Frequency (RF) signal to the Body Control Module (BCM) or the aftermarket alarm module. A beep sound sent over a cell phone will NOT unlock you car.

Well I just tried this today and guess what??? It didnt work!

Roger., youre right. Take it from a Radio engineer...cars are opened with an RF signal. IF it were sonic, you might be able to use cell , but the frequency (ultrasound) would be too high for the mike on your phone to interpret

Here's the problem with the nay-sayers and the fellas over at Snopes. They're correct on one issue but ignoring the actual function at work here. Your phones microphone and speaker do not translate RF, that's correct. But your phone's RF modulators and receivers DO. Phones use more than just one system to detect signal. Especially if your phone is at all internet capable, it's picking up RF and IR and WiFi and Bluetooth and tin cans on strings and all sorts of stuff. That's why phones have airplane mode. It shuts down all the different signals (otherwise they would simply ask you not to make and receive phone calls in flight if the only signal coming or going was sound waves). Ever had a phone make your computer or stereo make wonky noises right before someone called? That's because your phone is set up to receive and send radio frequency signals (in fact your phone converts your voice AFTER the microphone into RF, sends that out and then the other phone translate it back into sound at the other end). Ever been talking to someone in the car and turned your stereo down so low you couldn't hear it, but the other person says it's blaringly loud? They certainly aren't getting that from the microphone ("if you can't hear it, the phone can't hear it", right?). They're picking up RFI (radio frequency interference). Certain phones and carriers have more issue with this than others, depending on if the phone is a GSM or CDMA system. So, no the car is not being unlocked by the "beep noise", it's being unlocked from the RF modulators and sensors. And FYI, I've personally unlocked my sister's car from several states away (Kansas to Florida), which if your key fob has that kinda range without assistance, you might not wanna carry that bad boy in your pocket. Just sayin.

This was happened with me in the market. I simply took a steel wire and give it the shape of key and insert it in the locking place and provide two or three jerks as we open the door with key. My effort was sucessful.

It is funny... it does SOUND plausible. The cell phones work on 800mhz transmitting digital information. The remotes might do the same. The transmitting frequency does not matter if some of the data squeaks through the filtering circuits it would be broadcasted by the tower as sound for the phone to decode... only the phone would reject it as any sort of digital sound codec... but it has already been broadcast to the phone by the tower.... the phone is not unlocking the car I think the tower is.... or the phone would put out a watt or two... perhaps more perhaps it sent it as a bluetooth digital signal...? If the unlocking information was more digital decoding stuff and NOT frequency accuracy and pulse width modulation like the old garage door operaters and such....With the right harmonics this could happen... mmmm

Belief however.... I would have to see it with me alone with the car in the desert and on the cell myself before I believed.... lol

Being a Ham Radio Operator K0emi and from Missouri I say showme.... with better video proof no hands and no other people around...?

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