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Author Topic: % Amazing Things Your Cell Phone Can Do  (Read 15306 times)

Ron

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #30 on: March 10, 2009, 06:11:40 PM »
They say the earth is round anyhow and I can believe that but unlocking the car with my Cell that is a difficult one.
« Last Edit: March 10, 2009, 06:14:14 PM by Ron »
Ron & Sam-home is where we park it. Currently located   HERE

DonTom

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #31 on: March 10, 2009, 10:08:26 PM »
I'm with you 100% on that 0%.  ;)

I wouldn't even waste my time to check it (I've been a radio technician for all my working life). When I saw that on the list of what a cell phone could do, then I thought it was fairly safe to assume most of the entire list was also untrue.

I wonder who comes up with such nonsense to spread around on the internet.

-Don- San Francisco

-Don-   AA6GA

2000 Fleetwood Tioga 24D, 7.4L

Eight motorcycles:
Original owner of:
1971 BMW R75/5
1984 Yamaha Venture
2002 Suzuki DR200SE
2013 Triumph Trophy SE
2016 Versys 650 LT
2016 Moto Guzzi Stelvio
2017 Zero DS ZF6.5
2017 Zero SR 13 w/pwr tank

PancakeBill

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  • Bill & Jolene/USA 97 Southwind 35P
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Re: % Amazing Things Your Cell Phone Can Do
« Reply #32 on: March 10, 2009, 10:30:18 PM »
The incoming RF from the cell tower contains the data (voice and other data) in digital form.

In the duplex mode that same data is re-transmitted instantaneously  in digital form on some frequency. It has nothing to do with whatever comes out of the speaker in analog form/ soundwaves. The key lock on the car receives digital data only.

   Lets assume the keylock code is 67112; when the lock receives that code in digital form during the re-transmit, bingo, the lock opens. It's the carrier frequency (315Mhz or so) containing that code and being acceptable to the lock, that determines whether or not the lock will open. The receiving bandpass on those lock receivers is probably very broad.

  There is a lot of frequency sharing going on in that part of the spectrum.

Neat discussion,


Carson.  The microphone will not pick up RF.  Just as you can't speak RF.  Speakers can't create RF.

Didn't miss the point.

Bill & Jolene W & Koda

Old Faithful, Yellowstone Association Bookstore
1997 Southwind 35P
Toads: 1997 Honda Accord & 1986 Westfalia
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DonTom

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #33 on: March 10, 2009, 10:37:03 PM »
I think you missed the point, Bill.

   The incoming RF from the cell tower contains the data (voice and other data) in digital form.

In the duplex mode that same data is re-transmitted instantaneously  in digital form on some frequency. It has nothing to do with whatever comes out of the speaker in analog form/ soundwaves. The key lock on the car receives digital data only.

   Lets assume the keylock code is 67112; when the lock receives that code in digital form during the re-transmit, bingo, the lock opens. It's the carrier frequency (315Mhz or so) containing that code and being acceptable to the lock, that determines whether or not the lock will open. The receiving bandpass on those lock receivers is probably very broad.

  There is a lot of frequency sharing going on in that part of the spectrum.

Neat discussion,

carson FL

The remote keyless entry receiver can only receive the digital code on a 315 MHZ RF carrier.  There is no 315 MHZ coming out of the cellphone, so you're out of luck.

-Don- San Francisco, CA

-Don-   AA6GA

2000 Fleetwood Tioga 24D, 7.4L

Eight motorcycles:
Original owner of:
1971 BMW R75/5
1984 Yamaha Venture
2002 Suzuki DR200SE
2013 Triumph Trophy SE
2016 Versys 650 LT
2016 Moto Guzzi Stelvio
2017 Zero DS ZF6.5
2017 Zero SR 13 w/pwr tank

scottydl

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #34 on: March 10, 2009, 11:26:30 PM »
I wonder who comes up with such nonsense to spread around on the internet.

Someone who is probably STILL laughing at their own practical joke, since these myths have been around for years and still get discussed and debated regularly on the internet.  This thread is a perfect example.  As long as folks still believe them, the message will continually be passed on via mass e-mails and forums posts.  ::)

Snopes.com as mentioned above, is a great resource for checking the validity of these "too good to be true" types of claims that spread through the internet and e-mail like wildfire.
Scott, wife, 3 boys... and the dog
- 2008 Forest River Wildwood 32BHDS
- 1995 Chevrolet Suburban C2500 tow vehicle
- 1994 Thor Residency motorhome... owned 2007-2012

wkndfun

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #35 on: March 11, 2009, 05:28:50 AM »
1 for 2, Glenn :)  Most people under the stress of a holdup would have trouble remembering the PIN number let alone reversing it.  And it doesn't work, another urban legend.

That's what I thought.  Glad someone else confirmed it.
Glenn and Tamie
Richmond VA.
1999 Winnebago Adventurer 34V diesel

DonTom

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #36 on: April 03, 2009, 05:17:54 AM »
 The receiving bandpass on those lock receivers is probably very broad.

One of my rather new keyless remotes just crapped out.  So I took it apart to see what's inside and to see if there's anything I can fix. The small 12 volt battery is good and there's nothing obviously wrong, so I will just order another set instead of wasting a lot of time trying to troubleshoot something so small and cheap.

Anyway, my keyless entry remotes have a crystal for 303.825 mhz. I assume the receiver is also crystal controlled. Since cellphones are nothing near that freq, there's absolutely no chance of it working by cellphone.

I have not taken the receiver apart, but I assume it is also crystal controlled, which means it's probably not all that broad.

Since these remotes use rolling code technology, I should not have to match up any digital codes with the new set. I just hope they are all (from BullDog) on 303.825mhz. But if not, I can change the crystal as long as the one in my old unit is not the problem!


-Don-  Reno, NV
« Last Edit: April 03, 2009, 11:24:35 AM by DonTom »
-Don-   AA6GA

2000 Fleetwood Tioga 24D, 7.4L

Eight motorcycles:
Original owner of:
1971 BMW R75/5
1984 Yamaha Venture
2002 Suzuki DR200SE
2013 Triumph Trophy SE
2016 Versys 650 LT
2016 Moto Guzzi Stelvio
2017 Zero DS ZF6.5
2017 Zero SR 13 w/pwr tank

gmsboss1

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #37 on: April 03, 2009, 08:28:00 AM »
I give up, I concede. I was wrong.  The whole thing was a scam.  Sorry I ever posted it.

On the other hand, it has been conclusively proven by the best engineers and physicists that Bumblebees cannot possibly fly.......

Peace!

Don
Don and Mary Ann (Pelicanlady) Nesbitt
Cary, NC
2007 Fleetwood Excursion 40X
2012 Jeep GC Overland 4x4 Hemi Toad
Life is not measured by the number of breaths we take, but by the number of moments that take our breath away!

scottydl

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #38 on: April 03, 2009, 08:49:32 AM »
Don't feel bad, that stuff is written to sound very believable and practical.  But for future reference, Snopes.com is really a great site for confirming or debunking any of those mass e-mails that we've all received.
Scott, wife, 3 boys... and the dog
- 2008 Forest River Wildwood 32BHDS
- 1995 Chevrolet Suburban C2500 tow vehicle
- 1994 Thor Residency motorhome... owned 2007-2012

DonTom

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Re: % Amazing Things Your Cell Phone Can Do
« Reply #39 on: April 03, 2009, 11:21:04 AM »
I give up, I concede. I was wrong.  The whole thing was a scam.  Sorry I ever posted it.

Don't be.  It's good for these scams to be exposed.

I would not have reopened this old thread if it wasn't for the fact that one of my keyless entry remotes just crapped out. That made me open the remote to see what's inside.  I  then decided to post the info here.

-Don- Reno, NV
-Don-   AA6GA

2000 Fleetwood Tioga 24D, 7.4L

Eight motorcycles:
Original owner of:
1971 BMW R75/5
1984 Yamaha Venture
2002 Suzuki DR200SE
2013 Triumph Trophy SE
2016 Versys 650 LT
2016 Moto Guzzi Stelvio
2017 Zero DS ZF6.5
2017 Zero SR 13 w/pwr tank

 

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