umts modes

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KiMiSUiCiDE

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does anybody know if there any companies working on a dualband or triband umts that has the U.S umts frequencies as well as the european ones also parallel with quad band gsm?
 
That's going to be the question of the year I think.

As it stands, UMTS in the rest of the world is at 2100/1900
Cingular UMTS is 1900/850
T-Mobile U.S.A is rumored to be deploying at 2100/1700.

So theoretically, for a phone to work on all GSM networks with UMTS, it'd be:

GSM 850/900/1800/1900 UMTS/HSDPA 1900/2100, 850/1900, 1700/2100

And a partridge in a pear tree... welcome to carrier lock in

-olly
 
the HTC TyTn (aka Cingular 8525) has US and European UMTS frequencies, as well as quad-band GSM. Only thing is it's running WM5 :boo
 
Make sure you make the caveat that it has CINGULAR UMTS, not U.S. UMTS, since when T-Mo deploys you'll have people thinking all UMTS is the same.

-olly
 
There is *no way* that T-Mo can make their network compatible with European UMTS phones. The 1900/2100 split is uplink/downlink. Cingular flubbed up by deploying on one frequency, because network overload then becomes a problem (which is why there was a launch, then a delay, then a re-launch.. and why they are working towards 850/1900 in the first place). T-mo can't do a 1900/2100 implementation because 1900 licenses are non-existant for them (other than the ones they have, which would jeopardize their existing GSM infrastructure), so Euro UMTS band phones will *never* work on U.S. 3G networks.

-olly
 
anybody hear from nokia or anything from any other carrier about a type of phone supporting all umts frequencies as well as quadbang gsm?
 
If by 'UMTS in band' you mean can they implement UMTS on the existing GSM bands, no, because there isn't enough available frequency space to do so. UMTS takes up a lot of room... ATT/Cingular tried to implement UMTS solely on the 1900mhz band up front, and they quickly ran into bandwidth problems.

For any kind of reasonably efficient W-CDMA/UMTS implementation, there needs to be an uplink/downlink type of architecture.

-olly
 
I doubt we will see many dual UMTS handsets in the immediate future. For one the North American UMTS networks are still at an early stage so there may not necessarily be the same roaming potential for non-Americans ('Americans' used to refer to North America as a whole) to roam on North American UMTS networks as there would be once UMTS is fully deployed (or near fully deployed). Another point is that North Americans themselves aren't necessarily buying UMTS handsets enmasse. We shall probably see more dual UMTS handsets when there is greater demand and rationale for them.
 
I agree with the above poster, I think the 2100 Euro band is the most useful now, and when 1700/2100 rolls around i think it will be like an addition radio, similar to what there are doing with 800/1900 umts.
 
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