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dual band? |
Xugaa
Joined: Oct 05, 2005
Posts: > 500
From: Great Britain
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where in the world does this work, if i bought a dual band phone in the UK?
i thought for uk phones:
band - uk
dual band - uk+europe
tri band - uk+europe+usa
quad band - world
correct?
sorry, just concerned when thinking about k800 and k790, can't choose between 3g or tri band and edge...?
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masseur
Joined: Jan 03, 2003
Posts: > 500
From: Sydney, London
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(this is from memory so don't quote me)
GSM phones were originally single band and that was 900mhz. This was available in Europe, alot of Asia and Australia/NZ
frequencies were getting filled so a second band was added which was 1800 and so phones were made to be dual band in order to give greater saleability and usability. In UK I recall that Orange and another used the 1800mhz frequency while cellnet and vodafone use 900mhz. Generally you were stuck with the frequency of your network but if you roamed to another country you could usually connect to carriers using a different frequency
then people started to travel more and wanted compatibility with US so tri band phones came along with not only 900 and 1800mhz but also 1900mhz
finally, US (and possibly elsewhere) introduced the 850mhz band and so quad band phones were born to give full coverage.
when 3g (UMTS) became available then we started to see dual mode (as opposed to dual band) phones, which could operate on the UMTS (2100mhz I think) frequency as well as two or more (usually) of the GSM frequencies
I'm not sure about edge but GPRS is carried on the same GSM frequency that you are connected to your network on
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Unless I'm very much mistaken...
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[ This Message was edited by: masseur on 2006-02-28 20:45 ] |
Xugaa
Joined: Oct 05, 2005
Posts: > 500
From: Great Britain
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thanks, very well said!
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jcwhite_uk
Joined: Feb 18, 2004
Posts: > 500
From: Dorset, UK Phone:Xperia Z1
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Quote:
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On 2006-02-28 21:32:43, Xugaa wrote:
sorry, just concerned when thinking about k800 and k790, can't choose between 3g or tri band and edge...?
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K800i is 3G and triband, K790i is Edge and Triband.
Checkout my photos at My Website"Duct tape is like the force. It has a light side, a dark side, and it holds the world together." |
Xugaa
Joined: Oct 05, 2005
Posts: > 500
From: Great Britain
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Quote:
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On 2006-02-28 21:48:23, jcwhite_uk wrote:
Quote:
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On 2006-02-28 21:32:43, Xugaa wrote:
sorry, just concerned when thinking about k800 and k790, can't choose between 3g or tri band and edge...?
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K800i is 3G and triband, K790i is Edge and Triband.
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doesn't the specs say that k950 is triband and edge,
and
k800 3g and dual band???
thats what i read...
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jcwhite_uk
Joined: Feb 18, 2004
Posts: > 500
From: Dorset, UK Phone:Xperia Z1
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From the  website for K800i:
Networks
GSM 900
GSM 1800
GSM 1900
UMTS
For K790i:
Networks
EDGE
GSM 900
GSM 1800
GSM 1900
Checkout my photos at My Website"Duct tape is like the force. It has a light side, a dark side, and it holds the world together." |
Xugaa
Joined: Oct 05, 2005
Posts: > 500
From: Great Britain
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i'm guessing that means triband and 3g...?
sorry don't understand that 
correct me if i've got it all wrong but, on esato it says:
K800i - Dual mode UMTS (2100MHz) - GPRS 900/1800/1900 MHz for Europe, Asia Pacific, Middle East, Africa
K800c - Dual mode UMTS (2100MHz) - GPRS 900/1800/1900 MHz for Mainland China. (Launch dependent on availability of 3G services.)
K790i Tri Band EDGE 900/1800/1900 MHz for Europe, Asia Pacific, Americas
K790a Tri Band EDGE 850/1800/1900 MHz for Americas
K790c Tri Band EDGE 900/1800/1900 MHz for Mainland China
i've probably misunderstood it all, if thats the case sorry.
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cletus141
Joined: Sep 20, 2005
Posts: 119
From: Reno, Nevada
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I was also told by a guy in a local shop whilst researching to see if I could use a w800i here in the states with decent reception (since it only uses the 1900 mhz that we have here, but not the 850) that the 1900 mhz is more suited to clearer reception over long distances whereas the 850 is better suited to building penetration and so forth. It made sense to me since the bass from your subwoofer will go thru walls etc, but the tweeters are a lot clearer.
My w800i does exactly that. good reception all around town, but in large buildings I lose my signal easily.
chris |
$m@rtph0ne
Joined: Feb 28, 2006
Posts: 77
From: new york
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@masseur, very nice explanation. the concept of international roaming gave rise to the demand for multi band phones.
@cletus, the w810 is an inevitable upgrade for w800 users in america. |
cletus141
Joined: Sep 20, 2005
Posts: 119
From: Reno, Nevada
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yes, I plan on getting it as soon as it comes out, i'm looking forward to EDGE too. Hopefully for me it gets picked up by cingular, though I've heard the rumor that they have an exclusive contract with Motorola for candybar phones.
chris |
$m@rtph0ne
Joined: Feb 28, 2006
Posts: 77
From: new york
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i too have read that cingular/motorola/candybar bit right here on esato. if i'm not wrong the w810 is se's 1st quadband/850 phone right ? it should be on all networks in america. |
cletus141
Joined: Sep 20, 2005
Posts: 119
From: Reno, Nevada
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I think that it will work on all networks except sprint (not sure, but they don't use SIM cards).
I'm hoping that they offer it with contract at Cingular so it will only be like @250 instead of $500 |
Sammy_boy
Joined: Mar 31, 2004
Posts: > 500
From: Staffordshire, United Kingdom
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@masseur - the other network that uses the 1800 mhz band is T-Mobile in the UK. Also Virgin do, as they use T-Mobile's network. As a result, if you have a sim-locked T-Mobile or Virgin phone, a sim from the other network (e.g. Virgin sim in T-mobile phone) will work in it
"All it takes for evil to flourish is for good men to do nothing" - Edmund Burke
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masseur
Joined: Jan 03, 2003
Posts: > 500
From: Sydney, London
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yeah, thats now, but I was talking about back in the days when dual band first started and networks like cellnet were around.
I recalled that at that time there were 2 networks on 1800mhz and 2 on 900mhz in UK but couldn't remember the second one on 1800mhz other than orange
was it one2one or something similar? anyway, its not important but if you can remember it might be interesting
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Sammy_boy
Joined: Mar 31, 2004
Posts: > 500
From: Staffordshire, United Kingdom
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Yes, it was one2one, which became T-Mobile. In fact, if you buy an old enough phone and stick a T-Mobile sim in it, it will display one2one on the display!
"All it takes for evil to flourish is for good men to do nothing" - Edmund Burke
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Posted: 2006-02-28 21:32
