T-Mobile USA with Unlocked Phones

[Mxtc]

I don't like the selection of phones that are subsidized on T-mobile. So I will go with an unlocked phone.
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What bandwidth specs should I look for, if I want a 3G/3.5G phone. i want the Xperia x10.
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I tried to get a milestone (droid unlocked), but the ones they were selling would only work with EDGE. (Are there milestones that work with t-mobile use's network)
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AWS - ? Isn't that 1700 bandwidth, so If I get a phone that has UTMS 1700, doesn't that work with T-mobile USA?
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2100 MHz - Isn't this T-mobile USA's frequency. If a phone has 2100, but not 1700, does this mean I can get 3G sometimes in certain locations, and not in others.
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UTMS? What should I search for?
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HSDPA? What should I search for?
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Thanks!

 

[Howie]

it has to be AWS which is 1700/2100 band 4 (one is download the other is upload)
T-Mobile USA - Wikipedia, the free encyclopedia

 

[Mxtc]

Thanks. So for example on the Sony Ericsson Xperia x10, if the phone says:

GSM/GPRS/EDGE 850/900/1800/1900
UMTS/HSPA 900/1700/2100

Will it be compatible?

 

[Howie]

as long as it does have band 4 like this article states it may
Sony Ericsson XPERIA X10 headed T-Mobile? Boy Genius Report

 

[Mxtc]

Thankx Howie.

1700/2100 for T-Mobile USA
850/1900 for AT&T
2100 for most Europe/Asian/Africa/Middle East

Source:
List of UMTS networks - Wikipedia, the free encyclopedia


Hopefully the X10 will be multi-banded. These frequencies will be in most unlocked phones. (no need to switch to AT&T)

UMTS frequency bands - Wikipedia, the free encyclopedia

 

[sirsilent]

2100 MHz - Isn't this T-mobile USA's frequency. If a phone has 2100, but not 1700, does this mean I can get 3G sometimes in certain locations, and not in others.

I would like to know this too. The Samsung Galaxy S for example has 2100 but no 1700. Will it work with T-Mobile's 3G?

 

[yatimameiji]

I would like to know this too. The Samsung Galaxy S for example has 2100 but no 1700. Will it work with T-Mobile's 3G?

Read Howie's post. Still cant figure it out?

 

[Caloy]

sometimes Band 4 is called Quad Band in other markets.

 

[jdmfa5]

You can also look for AWS compatible phones:

Phones off the top of my head that are compatible with T-Mo 3G:

SE X10
Samsung Galaxy
Pharos(Windows Mobile Device)
Nokia N900
Nexus One

 

[elchingon666]

I would like to know this too. The Samsung Galaxy S for example has 2100 but no 1700. Will it work with T-Mobile's 3G?

No, it MUST have both to use 3G.