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Cellphone Remote Key Entry


akewlguy

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Recently I received an email stating if one is locked out they could use their cell phone and someone with key on other end to get in.

The idea was to press the key button on the other end and door would unlock. I tried and it did not work, but it seems possible. I suspect its a frequency and the signal would go through the phone?

Just something stupid and interesting..

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Frequencies from the key is a noise that a human cannot hear.

So can a cell phone acuratly recreate the exact same frequencie signiture?

Just ask your self the one logically answer, how do you always know when someone is calling from a cell phone over a landline?

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