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Old 02-26-07, 11:06 PM   #16 (permalink)
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This isn't totally related, but here goes:
I've heard a rumor that if you turn the volume all the way up on a cell phone's speakerphone and hold it near the car's RF receiver, and if someone on the other end of the phone triggers that car's remote, the RF signal will actually be transmitted through the phone connection, be picked up by the car, and unlock (or whatever) the car.
Can anyone confirm this? Can cell phone signals even carry that high of a frequency? I personally doubt it, although I have no clue what frequencies those kinds of RF transmitters operate on or what frequency range cell phones have, or even if cell phones can carry any type of RF signal (I have no experience with RF technology, forgive me if this is answered by some fundamental law of RF theory!)
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Old 02-27-07, 09:03 AM   #17 (permalink)
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Originally Posted by aximgeinus View Post
This isn't totally related, but here goes:
I've heard a rumor that if you turn the volume all the way up on a cell phone's speakerphone and hold it near the car's RF receiver, and if someone on the other end of the phone triggers that car's remote, the RF signal will actually be transmitted through the phone connection, be picked up by the car, and unlock (or whatever) the car.
Can anyone confirm this? Can cell phone signals even carry that high of a frequency? I personally doubt it, although I have no clue what frequencies those kinds of RF transmitters operate on or what frequency range cell phones have, or even if cell phones can carry any type of RF signal (I have no experience with RF technology, forgive me if this is answered by some fundamental law of RF theory!)

Ummm.... no. Be about like shining a flashlight on the microphone and expecting light to come out of the speaker of the phone on the other end.

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Old 02-27-07, 09:53 AM   #18 (permalink)
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no way... that is a common troll email. Research that at Snopes.com.

Even the most basic of thinking things out will lead to the conclusion that there is no way an RF transmission can be picked up by a audio microphone, converted into digital, transmitted to a celltower, then multiplexed to trunked phone backbone, converted back to cell transmitter, converted to audio in a cellphone handset, and reconstruct the RF signal in a form that the car remote system would understand.

Completely absurd. Of course people that believe in magic think all sorts of things are possible.

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