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mobile phone car unlocking


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i found this today and was wondering if anybody had tried it

 

Have you locked your keys in the car? Does you car have remote keys?

 

 

This may come in handy someday. Good reason to own a cell phone:

 

If you lock your keys in the car and the spare keys are at home, call

 

someone at home on their cell phone from your cell phone.

 

Hold your cell phone about a foot from your car door and have the person

 

at your home press the unlock button, holding it near the mobile phone on

 

their end. Your car will unlock. Saves someone from having to drive your

 

keys to you. Distance is no object. You could be hundreds of miles away,

 

and if you can reach someone who has the other "remote" for your car, you

 

can unlock the doors (or the trunk).

 

Editor's Note: *It works fine! We tried it out and it unlocked our car over a cell phone!"*

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pmsl :rofl:

 

mate could your sig get any darker and smaller? :D hehe

 

You listen to me my friend, it took me all this time to work out how to put the bloody thing up there and it was the first pic i came across so leave me alone bully.

 

 

Hey I just thought, if you could send me my campaign poster I could use that.

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i was round the other side of my sisters mahoosive house, but i tried it with out the mobile phone first and could not open the car (which was in the garage)

then tried with the mobile and it did actually work.

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I have all the rare bits you can't find :tongue::tongue:

 

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So the phone was acting as an aerial for the keyfob.

 

Doubt it.

 

I'm even dubious about how this would work with an ultrasonic keyfob. Voice down a mobile phone is hugely compressed and concentrates on just the frequencies required, higher or lower than normal speech are unlikely to be transmitted to the other end at all. Standard modem frequencies would probably go, but ultrasonic .... I dunno ....

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iirc the passband on a normal telephone system is 0.3-to 3.4KHz (and i can't see why a mobile would be any different) as this is where the majority of "information" is in human speech. Therefore I would think it highly unlikely that a ultrasonic key fob would work as a human would have to be able to "hear it" in order for it to be transmitted over the phone.

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