Cell Phones

Sup Guys,

I am by no means an expert on cell phones but can someone here tell me if it's true that cell phones are near impossible to use above 8000 feet in an airplane?....thnx in advance

 

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See here

 

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thnx alot for that link

 

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cellphones also dont work at your house, no matter where you live, the house next door wil always have 3 times more signal than yaur house

 

I have just always been curious about what kind of cell phone calls (they were said to be personal cell phones not the ones supplied by the airlines) were passengers using on 9-11 that could make calls from such high altitudes

 

What reason would there be for cell phones not working at altitude or speed?

 

well #1 the metal bedy of an airplane would stop most signal in my view, and #2 in order to make a call you need to have your cellphone relaying with a transmitter, if you are flying so fast that you are using different transmitters constantly ther must be some problem with making a call

 

That's fascinating. I had no idea that metal resisted a radio transmission more if it were higher up.

 

I would imagine that flying at most at about 600mph makes no difference to the signal. Its travelling at 186,200miles per second. :m:

 

I think vslayer's talking about moving between different transmitter regions, nothing to do with red/blue shift. I don't think the plane would be travelling fast enough to cause transmitter problems either though.

 

ok, so a tower has 5km range, so thats a new tower every 10km, a plane travelling 13km/minute is therefore changing transmitters every 7 1/2 minutes, i guess it wouldnt make that much difference

 

Actually... it's more like once every 46 seconds, but I still think that's easily slow enough for a phone to handle.

 

airliners go much higher than 5km if memory serves

 

no, 5km sounds about right

 

Well, they go as high as 40,000 feet. That's about 7.5 miles or 12 kilometers.

 

I've been to 4x kilofeet on a 777, or prob even 5x.

 

Did you fall out?

 

It's the nature of metal. You'll lose signal inside a metal framed building, right? Figures you'd lose signal in a giant aluminum tube.

 

Yeah 50kfeet sounds about right

 

when you take off and land you're lower. but they tell you you can't use them then. how ironic

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