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Date:      Mon, 22 Jan 2001 13:56:50 +1030
From:      Greg Lehey <grog@lemis.com>
To:        "Michael C . Wu" <keichii@iteration.net>, Brad Knowles <brad.knowles@skynet.be>, freebsd-chat@FreeBSD.ORG
Subject:   Re: Mobile phone coverage (was: VCD (was Re: cvs commit: src/sys/dev/ata atapi-cd.c))
Message-ID:  <20010122135650.Q3066@wantadilla.lemis.com>
In-Reply-To: <20010121211008.A45892@peorth.iteration.net>; from keichii@iteration.net on Sun, Jan 21, 2001 at 09:10:08PM -0600
References:  <KAECKEJJOLGHAFGGNIKMAELICAAA.res02jw5@gte.net> <20010121145018.A73989@citusc17.usc.edu> <20010121165422.A44505@peorth.iteration.net> <v04220821b691222656eb@[10.0.1.2]> <20010121181251.B44819@peorth.iteration.net> <v04220825b6912c57be5b@[10.0.1.2]> <20010121184810.A45428@peorth.iteration.net> <20010122123518.L3066@wantadilla.lemis.com> <v04220829b6914d70834a@[10.0.1.2]> <20010121211008.A45892@peorth.iteration.net>

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On Sunday, 21 January 2001 at 21:10:08 -0600, Michael C . Wu wrote:
> On Mon, Jan 22, 2001 at 03:42:45AM +0100, Brad Knowles scribbled:
>> At 12:35 PM +1030 2001/1/22, Greg Lehey wrote:
>>
>>>  That's not the issue here.  BTW, for the USA you need a three-band
>>>  phone.  That is, incidentally, the only kind of phone which will work
>>>  just about anywhere (I'm not sure about Israel and Korea).
>>
>> 	Uhh, I think you need more than that.  Let's count:
>>
>> 		AMPS/NAMPS
>> 		US TDMA (1900Mhz? 900Mhz?)
>> 		US CDMA (1900Mhz? 900Mhz?)
>> 		US GSM (1900Mhz)
>
> US 1900 and 900
>
>> 		European GSM (900Mhz/1800Mhz)
>
> Asian GSM 900/1800
>
> Greg is right, you only need a tri-band phone to roam across all
> the world's GSM networks.  However, usually the tri-band phones
> are ugly and big.

I haven't seen any big ones.  The one I have is ugly, but it's smaller
than my Nokia.

> Having a dual-band phone will work well enough for anyone.  Simply
> because you have at least 900mhz running.

Nope, it's no good for me.  The rental costs for a single visit to the
USA would pay for the phone and the whole year's phone costs. 

>>>>  Love love 3G+W-CDMA.
>>>
>>>  And where do I get one?
>>
>> 	Damn good question.  I wanna know, too.
>
> The only working 3G W-CDMA network is in Japan.  It will be at least
> two years before other countries have that.  Even then,
> the Asian countries will switch over long before Europe and America.
>
> You can find out more about W-CDMA and 3G phones in
> the Artech House Publishers' "Mobile Communications Series" of books.
> I have the entire collection. :)

I've been looking at web pages, and it doesn't sound to me that 3G is
a new transmission technology, just something that climbs on the back
of one.  Is there any reason why it should be tied to CDMA and not to
GSM?

> There are less regulation and much greater demand for the technology
> in Asia.  In many Asian countries, (.jp, .tw, .hk, .sg), it averages
> to two or three cell phones for the entire population.

Nonsense, I've seen dozens of mobile phones in cramped places.  I'd
guess that just about everyone has one.  Are you thinking of Bhutan or
Aden, maybe?

Greg
--
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