unlocking your car thru the cellphone??

[geez]

just read this from a forwarded message sa email entitled "things you never knew your nokia cellphone could do". the statement below made me think...possible ba talaga? has anybody tried this!?:innocent:
incidentally this is my first post

II*
* Subject: 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!"*

[chain]

according to other people in this forum, it doesn't work.

haven't tried it personally though, but I figured that the signal carried by the remote won't be able to piggyback through the signal transmitted by a cellphone.

[zman]

according to other people in this forum, it doesn't work.

haven't tried it personally though, but I figured that the signal carried by the remote won't be able to piggyback through the signal transmitted by a cellphone.

Hmmm, my friends and I tried it when we were in Tagaytay 2weeks ago, and it worked with their cars. It didn't work right away though, you'd have to work with positioning the phone at the right spot for the alarm to pick up the signal.

[creepy]

Hmmm, my friends and I tried it when we were in Tagaytay 2weeks ago, and it worked with their cars. It didn't work right away though, you'd have to work with positioning the phone at the right spot for the alarm to pick up the signal.

Really? So how do you "position" the phone?

[zidane21]

wow ok po a, pwede po pala yan! i heard it before pero then i believe myth lang sya imo, pano po ba ang positioning ng phone to the car para ma-receive nya yung signal nung keyless remote?

if possible naman po bka meron pong pic or video demos para mas maintindihan po. thanks po

[CVT]

Hmmm, my friends and I tried it when we were in Tagaytay 2weeks ago, and it worked with their cars. It didn't work right away though, you'd have to work with positioning the phone at the right spot for the alarm to pick up the signal.

This is the item in that thread which I am most interested.

Can you share us how you did it?

Haven't tried it though myself. This provides some degree of encouragement.

[geez]

Hmmm, my friends and I tried it when we were in Tagaytay 2weeks ago, and it worked with their cars. It didn't work right away though, you'd have to work with positioning the phone at the right spot for the alarm to pick up the signal.

and also what car kaya ito?

hmm...maybe it also depends on how strong the signal is? baka sa sobrang trial and error sa positioning ay patay ka naman sa billing ng cellphone

[zidane21]

paki post nyo na rin po kung anong specific brand ng mga keyless car security ang pwede using this method (e.g. Code Alarm, Clifford, Toyota OEM, Honda OEM, etc.) thanks po

[cocoy]

hard to belive that it can actually work. we should asked the Mythbusters to try this out. if they havent already.

[batang_raon14]

weird...same as sir dehadista's post, I couldn't quite figure out how an infrared beam could be transferred a mile away via cellular signals. Nakaka-curious ah. :D

[zman]

trial and error nga in trying to get the car to recieve the signal from the phone. the cars were a 05' sentra and 99' civic.

regarding infrared, though i am no expert, i think infrared requires a direct line of sight to the target. meaning kung naka talikod ka sa tsikot dapat di mag respond yun alarm when you press the button, like the remote of a tv.

[mojojojo]

weird...same as sir dehadista's post, I couldn't quite figure out how an infrared beam could be transferred a mile away via cellular signals. Nakaka-curious ah. :D

Actually, the remote of our alarm units is using RF signal.

I infer that the RF frequency are too high for us to hear but the mobile phone's speaker & mic somehow captured and transmited it over the airwaves. Therefore, what I believe you should do (if this really works) is to place the mobile phone (the one with the car) as near as possible to the alarm receiver for it to work.

[Hayward]

Me and wifey tried it once before but was not able to unlock it. Maybe because of the distance of the receiving cellphone to the alarm control wasn't that near to activate it. Will try it again though to see if it really works for my ride.

[Karding]

http://www.snopes.com/autos/techno/keyless.asp

Relaying remote entry system signals via telephone might work if the signals were sound-based, but they're not. An RKE system transmits an encrypted data stream to a receiver inside the automobile via an RF (radio frequency) signal, a signal that can't be effectively relayed via cell phone. (In any event, RKE systems and cell phones typically operate on completely different frequencies; the former in the 300 MHz range and the latter in the 800 MHz range.)

(More than a few people have inadvertently fooled themselves into believing the cell phone method of unlocking car doors actually works because they tried it and achieved the desired results — not realizing their cars were still within range of their keyless remote devices, and the signals that unlocked the doors were transmitted the usual way [i.e., through the air], not via cellular phone connections.)

It's possible this method might work with cars that use something different than standard RKE systems, but it doesn't work with the vast majority of models.

no need for mythbusters,here comes snopes.com

[SNAKE V6]

I believe alarms are not infrared since there is no infrared receiver on the car, even if you don't have line of sight (which is needed for infrared), you can activate/de-act the alarm. Isa pa, if its a code that is transmitted through RF, the cellphone will not relay that since iba ang modulation na ginagamit ng cell (GMSK for GSM), QPSK for 3G. Also, you can't just modulate the alarm's pulsating RF over the cell's RF signal dahil i-dedemod pa yan sa receiving side, which will filter the signal not intended for the receiver and it requires a modulator to make some signal ride over the other's.

Now you can install a device that could lock/unlock your car using your cell, that's more probable IMO.

[empy]

i-try ko to mamaya as one-man Mythbuster!!

pero huwag lang dito sa work dahil ayokong magmukhang gago sa parking lot :bwahaha:

[StraightSix]

weird...same as sir dehadista's post, I couldn't quite figure out how an infrared beam could be transferred a mile away via cellular signals. Nakaka-curious ah.

Actually, the the remote of our alarm units is using RF signal.

I infer that the RF frequency are too high for us to hear but the mobile phone's speaker & mic somehow captured and transmited it over the airwaves. Therefore, what I believe you should do (if this really works) is to place the mobile phone (the one with the car) as near as possible to the alarm receiver for it to work.

Unless you're talking about the same car, the truth of the matter is not all car remotes use RF. The same way that not all car remotes use InfraRed.

[gregg_g]

Not true in my end, tested it with our Sorento and Picanto, with audiovox RKE's, I was in my office and my wife was at home, did the instruction (that is called her on her mobile-globe to globe call), nothing happened.

2nd or third was with my father's crosswind with its factory RKE, still nothing happened...

Well, at least, somekind of wishfull thinking exists...

[batang_raon14]

Did the same with the stock keyless entries of a lancer mx 2004, optra 2004, and a 2005 sportivo, tried different angles but it nothing happened.

Although, if we're talking about those hackers that uses laptops with rf receivers to detect a signal being released by an RKE of a car so that it could trick out the random RF numbers the RKE creates (if I got it right), then perhaps that could happen. Read this on cnet before, link is:

http://reviews.cnet.com/4520-3513_7-6516433.html

[Psylocke]

And don't forget that voice calls are compressed with the GSM codec.