GSM 850

Posted: 01-26-2005, 09:43 PM

Paul Busby

Posts: n/a

Isn't it about time SE & obviously other manufacturers apart from Mot
started producing more quad band GSM phones if much or some of the expansion
in the Americas is going to be in the old 800MHz band as GSM 850? I presume
there will also be more 1900MHz coverage as well, depending on carrier
though. In principle at least, designing in 850 shouldn't be too difficult
(low pass/band pass filters that don't cut that frequency, RF amps with
sufficient bandwidth etc). Same IF, so it's just the front end & only ~50MHz
lower.

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Responses to "GSM 850"

Lina & Niall

Posts: n/a

Re: GSM 850

Posted: 01-27-2005, 06:03 AM

"Paul Busby" <me@privacy.net> skrev i meddelandet
news:35qh83F4picgqU1@individual.net...
> Isn't it about time SE & obviously other manufacturers apart from Mot
> started producing more quad band GSM phones if much or some of the
> expansion in the Americas is going to be in the old 800MHz band as GSM
> 850? I presume there will also be more 1900MHz coverage as well, depending
> on carrier though. In principle at least, designing in 850 shouldn't be
> too difficult (low pass/band pass filters that don't cut that frequency,
> RF amps with sufficient bandwidth etc). Same IF, so it's just the front
> end & only ~50MHz lower.

Its still a bit of a compromise with antenna design etc. SE quite often
release two Tri-band models: 850/1800/1900 and 900/1800/1900. I have roamed
in the US and Canada with a number of 900/1800/1900 phones and got
reasonable coverage within urban areas, it would be interesting to know how
much better (if at all) ut would have been with the addition of the 850
band.

Anyone had much experience coming from the other direction? I wonder how
much difference not being able to use GSM900 would make in Europe. Comments
anyone?

Hiram Hackenbacker

Posts: n/a

Re: GSM 850

Posted: 01-27-2005, 08:43 AM

Lina & Niall wrote:

> Anyone had much experience coming from the other direction? I wonder how
> much difference not being able to use GSM900 would make in Europe. Comments
> anyone?

Not having access to GSM900 in parts of France and Spain can be a
problem - the GSM1800 networks in both Countries have poorer coverage
than say the two GSM1800 networks in the UK.

In my experience a dual (900/1800) phone is essential when travelling in
Europe.

Stuart Friedman

Posts: n/a

Re: GSM 850

Posted: 01-29-2005, 03:38 AM

Motorola isn't the only quad band phone out there, but there are still a
relatively small number of quadbands out there. Check out phonescoop.com.
You can generate a listing of all known quadband phones.

Stu

"Hiram Hackenbacker" <holiday@pagemoy.com> wrote in message
news:1106815401.31057.0@echo.uk.clara.net...
> Lina & Niall wrote:
>
>> Anyone had much experience coming from the other direction? I wonder
>> how much difference not being able to use GSM900 would make in Europe.
>> Comments anyone?
>
> Not having access to GSM900 in parts of France and Spain can be a
> problem - the GSM1800 networks in both Countries have poorer coverage than
> say the two GSM1800 networks in the UK.
>
> In my experience a dual (900/1800) phone is essential when travelling in
> Europe.

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GSM 850

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