Thursday, February 21, 2008

Tip 2: You can unlock your remote keyless entry enabled car from a long distance via a mobile phone call

This tip has generated vast amounts of, sometimes heated, debate. A lot of people swear that the trick works while a great many others claim that it does not and is technically impossible. I suspect that at least some of the people who claim that the

technique works have conducted their experiments without realizing that they are actually still within unlocking range of their vehicles. The range of the entry systems may be significantly greater than experimenters realize. Thus, people may actually believe that they have unlocked their vehicle via their mobile phone when they have in fact done so in the normal way via their remote device.

That said, a great many posters claim to have used the technique from many kilometres distance. In truth, logic and common sense compellingly suggest that the trick is not technically possible. Keyless entry systems work on radio waves, not sound, so it is very difficult to believe that the unlock signal could be transmitted via a mobile phone call, especially since mobile phones and keyless entry systems work at entirely different frequencies.

However, the volume of conflicting reports on the issue means that, at this point, it would be premature to state categorically that the trick will never work under any circumstances. Some have postulated that the technique might be possible with certain keyless entry systems and/or phone services or combinations thereof and this may indeed be the case. This scenario would explain why the technique might work for the few but not the many. Coupled with false conclusions made from invalid experiments, these exceptions might explain why so many people so vehemently claim that the trick actually works in spite of the evidence against it.

What I can say conclusively is that I have personally testing the technique with several keyless entry/mobile phone combinations without any success whatsoever. And, even if the technique does sometimes work, it seems clear that in the great majority of cases, it does not, so this tip is actually rather pointless.

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