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What's the reason behind this? I understand if you're releasing a handset to a specific region(China, Japan) only but, the larger % of the world uses the same technology. What I'm asking is it really that hard to make a handset that would work optiminally in Europe, U.S., S. America...
Is it a hardware issue? Can a phone only support so many bands/frequencies? Is it a money issue?


I have seen the BB Storm unlocked with support for both cdma and Gsm, so it seems possible...
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Posted: 2009-04-21 06:14:41
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I just wish that they could make EVERY phone Quadband and have all 3G/HSPDA frequencies...sigh.
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Posted: 2009-04-22 22:46:09
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Maybe it's to keep that phone exclusive to a certain region for a time,
sales etc I don't know, but whats the point in the whole world having the same handset? you just have to wait till it comes to you if it's available to your region
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Posted: 2009-04-24 17:02:59
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Doesn't really make sense, it must be something to do with cost.
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Posted: 2009-04-24 17:09:39
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its to do with interference in different countries.

in the uk its ok but in another country it could intefere with an emergency service or radio channel etc so phones generally are limited in frequencies used.

Is also down to chipsets being used... not many around that can do all the frequencies in one go... plus they would eat power unless u could choose on the phone which ones to use and not use.

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Posted: 2009-04-24 17:54:42
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@voda_jon

You're a mine of info. Thanks.
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Posted: 2009-04-24 17:57:01
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It's because the lovely people at GSM decided on frequencies while America was in the toilet, and so, they got themselves a dodgy one.
But yeah, as Jon said, interference, and in some cases, environmental constraints also have to be taken into account.
Higher frequencies are better, though. Carry more data, if I'm not mistaken.
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Posted: 2009-04-25 00:44:28
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@arien... not really. its all the same. speed an amount carried all depend on how much of a 'block' of the frequency each network has been given.

Take the new badn of 700mhz that looks like it will be used for the new LTE systems. even though its 700mhz it will be used for the 4G type networks.

If a network buys a block ranging across frequencies of 701mhz to 730mhz then it can afford to carry more data at quicker speeds than a network that only has ranges 730-740mhz as they cant carry as much traffic!

All quite confusing an yeh seems like either US was asleep or had been using the GSM block for emergency services or backup or tv or radio lol.

J.
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Posted: 2009-04-25 16:06:05
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@J
I'm fairly sure that higher frequencies in the EM spectrum are higher energy; the higher up the spectrum, the more energy delivered by each photon.
Which was the point that I was getting at, a lower 'block', say, with a range of 700-730MHz, will only be capable of carrying the same amount of data as a block ranging from ~1800-1810MHz is capable of carrying. (these are just numbers for argument's sake)
Hence why I said higher frequencies could be seen as being better.
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Posted: 2009-04-25 16:16:22
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As you can see from some new phones, Sony Ericsson acts really strange. Americans versions have more frequencies than the models for the rest of the world! It's really stupid! People travel a lot and they want to use their phones everywhere.

Like C510. American market has it with GSM 850 / 900 / 1800 / 1900 and UMTS 850 / 1900 / 2100. The rest of the world has no GSM 850 and no UMTS 850 / 1900. Three frequencies less! If SE wants to split a phone, they should remove GSM 900 / 1800 and UMTS 2100 from American version!

PS. I'd like to have a phone: GSM 400 / 850 / 900 / 1800 / 1900 + UMTS 400 / 850 / 900 / 1700 / 1900 / 2100.

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Posted: 2009-04-28 16:14:39
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