To night my mate showed me a trick, he was in his flat some 200m or so from his car with me by it on the end of a phone. he presses his key fob and to my utter disbelief the car opens! ive been looking online and everyone says its a myth even myth busters busted it, so why did it work has anyone else tried it? it shouldnt work as its radio waves which a phone shouldnt be able to transmit, but it worked!!
who has used phone to open car?
- Thread starter bribrolly
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Anonymous
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I got this from a website:
"Comforting though it may be to imagine you can unlock your car door in an emergency by receiving a distant signal via your cell phone, it can't possibly work — not with the technology as it presently stands, at any rate.
Here's why:
Your remote car key operates by sending a weak, encrypted radio signal to a receiver inside the automobile, which in turn activates the door locks.
Since the system works on radio waves, not sound, the only conceivable way a signal from your spare remote could be picked up by one cell phone and relayed to your car's onboard receiver by another would be if both phones were capable of sending and receiving at exactly the same frequency as the remote itself — which they can't be, given that all remote entry devices operate at frequencies between 300 and 500 MHz, while all mobile phones, by law, operate at 800 MHz and higher.
It's apples vs. oranges, in other words. Your cell phone can no more transmit the type of signal needed to unlock a car door than your remote key is capable of dialing up your Aunt Mary ... though no one can predict what miracles the future may bring"
"Comforting though it may be to imagine you can unlock your car door in an emergency by receiving a distant signal via your cell phone, it can't possibly work — not with the technology as it presently stands, at any rate.
Here's why:
Your remote car key operates by sending a weak, encrypted radio signal to a receiver inside the automobile, which in turn activates the door locks.
Since the system works on radio waves, not sound, the only conceivable way a signal from your spare remote could be picked up by one cell phone and relayed to your car's onboard receiver by another would be if both phones were capable of sending and receiving at exactly the same frequency as the remote itself — which they can't be, given that all remote entry devices operate at frequencies between 300 and 500 MHz, while all mobile phones, by law, operate at 800 MHz and higher.
It's apples vs. oranges, in other words. Your cell phone can no more transmit the type of signal needed to unlock a car door than your remote key is capable of dialing up your Aunt Mary ... though no one can predict what miracles the future may bring"
shidevil your correct ive read that very same article myself but it worked. as z4 beemer said it was in more or less a straight line of sight so i think its possible the phone maybe amplified the signal or something, because as ive said, and your article says a phone cant transmit radio waves.
Im trying it myself tomorrow, ill get the girlfriend to use the spare key when im in town or at least a few miles away.
anyone else feel free to try too.
Im trying it myself tomorrow, ill get the girlfriend to use the spare key when im in town or at least a few miles away.
anyone else feel free to try too.
My Micra remote works from about 100m away, so if you were higher up and had a reasonable line of sight to the car then it could work, but not because of the phone, which as someone else posted, is just an urban myth.
blew my mind when he did it, but aye it was prob just down to good line of sight or something now that ive read a bit, but for sure it opened the car from a distance that it couldnt without the phones. going to test over a few miles.
could be the making of a great iphone app if it does work lol
could be the making of a great iphone app if it does work lol