Database Users

3G ATT (usa)?

not quite sure how to search this so i guess ill ask (or reask) the question.
1. am i able to reflash my Leo to work with USA ATT 3g bands if a rom ever comes out in the future?
2. can someone confirm to me if step #49 of this tips and tricks thread (http://forum.xda-developers.com/showthread.php?t=583638) and that piece of 3G activation software works and can allow my Leo to work with ATT 3g? (i dont think it does)
thanks!

1. Nope. It's all hardware.
2. See above. Nope.
It's all edge, my friend!

b-16707 said:
not quite sure how to search this so i guess ill ask (or reask) the question.
1. am i able to reflash my Leo to work with USA ATT 3g bands if a rom ever comes out in the future?
2. can someone confirm to me if step #49 of this tips and tricks thread (http://forum.xda-developers.com/showthread.php?t=583638) and that piece of 3G activation software works and can allow my Leo to work with ATT 3g? (i dont think it does)
thanks!
Click to expand...
Click to collapse
The HTC HD2 will not use 3g in the US. But since the phone is so fast, browsing the internet using edge is faster then with 3G on a sony X1a (my last phone).

do you already have an HD2? Regardless of anything you've read thus far, 3G is hardware dependent. No USA 3G internal radio? No USA 3G.
If you don't already have one, just wait until next month because the HD2 is supposedly coming to Telstra (who operates on 850mhz 3G, just like AT&T). HTC have said that the HD2 is coming in Q1 2010 but it's more than likely going toward T-Mo (based on leaked pics) or other carriers other than AT&T.

ah well i was under the impression that the hardware was both same for euro and us releases and just the software controlling it was different...(and how come they didnt name it the T8582 vs the T8585 as with the HD1 standard for the 2 different radios?....how they gonna distinguish the different hardware HD2s?)
come next year i may just sell mine for the new one (testra one you said). i dont suppose that tmo one will work with att 3g as its on a worldwide 3g band huh.
truly is a nice phone no doubt still

T-Mo US operates on 1700mhz AND 2100mhz for 3G (someone correct me if im wrong...one for uplink and the other for downlink). ATT can operate on 850mhz OR 1900mhz. The European version only has 900mhz and 2100mhz. As you can see, if you use the HD2 in the US (t-mo or ATT) right now, you're restricted to only EDGE unless they both possess their respective 3G bands.

this is what someone on htcforums.com said to me...confirm? deny? reject? love? i guess im just receiving conflicting info as to why this guy would believe this then?
"What you are asking about is a software differentiation. According to PDADB.net, the HD2 US version is scheduled for March 2010. http://pdadb.net/index.php?m=specs&id=2 ... us_htc_leo
The GSM version currently available is capable of T-Mobile US 3G frequencies; as T-Mo is the only US company to use WorldWide frequencies {2100MHz}. The version that is scheduled for March will be for AT&T frequencies. Since the hardware on these two versions are identical, you could flash a WorldWide version with a US version radio, & use a WW version with AT&T."

Your link doesnt work. I don't want to beat on a dead horse, but countless of T-Mo USA users have the HD2 and they could only have access to EDGE. Like I said, for T-Mo USA, their 3G has a split frequency (one for upload the other for download) that's why you need both 1700mhz and 2100mhz.

thats the link
http://pdadb.net/index.php?m=specs&id=2062&view=1&c=htc_hd2_us_htc_leo
bah oh well. the dude seems adamant that it will work...

ah here we go, this was the comparison i was looking for
USA
http://pdadb.net/index.php?m=specs&id=2062&view=1&c=htc_hd2_us_htc_leo
other
http://pdadb.net/index.php?m=specs&id=1783&view=1&c=htc_hd2_t8585_htc_leo_100
this on HTC's site
Europe: Network Bands
* HSPA/WCDMA: 900/2100 MHz
* GSM: 850/900/1800/1900 MHz <------
Asia Pacific:
* HSPA/WCDMA: 900/2100 MHz
* GSM: 850/900/1800/1900 MHz <------
which means it can work here no? since USA att 3G is 850 or 1900?

* HSPA/WCDMA: 900/2100 MHz <--3G
* GSM: 850/900/1800/1900 MHz <-- EDGE

Your problem is that you're looking at the voice/2G/EDGE bands. The HD2 is a quadband phone, so you can pretty much use it anywhere in the world. Your original question was regarding 3G, which the HD2 does not support here in the USA (yet).
3G would be this line HSPA/WCDMA. See how it's only support 900/2100mhz?

GSM is only voice correct? .... getting my voice/data abbreviations all mixed up...

b-16707 said:
GSM is only voice correct? .... getting my voice/data abbreviations all mixed up...
Click to expand...
Click to collapse
GSM is voice and EDGE (data)

For ATT the key is 850mhz 3G as that what ATT has been adding, I don't believe they are doing any new 1900 towers. You can bing it there are lot's of articles about the iPhone congestion and changing/adding 850 towers. If we are lucky Telstra an, Australian carrier, will pick up the phone soon because they use the same 850 just like ATT. This is how people got the 3G on the HD(1) to work on ATT in the united states. HTCPedia posted a Telstra HD2 rom on Dec 9th, so hopefully they are close to releasing.

is there any way to buy a tmobile us hd2?

i am stay in england. i want to buy the new hd2.
thx

Do yu really want a phone that is bigger than the one you'd get locally, and won't be able to use 3G?

jailBrokenxxxxx......

kilrah said:
Do yu really want a phone that is bigger than the one you'd get locally, and won't be able to use 3G?
Click to expand...
Click to collapse
I agree with the lack of 3G being an issue, but I've gotta have a great big LOL at the size comment. LOL mate - funny.

I've been meaning to ask this question. So how much difference is the size? I heard it was not very noticable. I saw a link that was posted to a blog somewhere. I'm not sure how credible that source is. Is it taller or wider? By how much?

i just know the euro version is 448MB RAM + 512MB ROM but, t-mobile us is 576MB RAM + 1GB ROM.

FloatHeavy said:
I've been meaning to ask this question. So how much difference is the size? I heard it was not very noticable. I saw a link that was posted to a blog somewhere. I'm not sure how credible that source is. Is it taller or wider? By how much?
Click to expand...
Click to collapse
It's 1.5mm taller - that's all (EU HD2 is 120.5mm and the HD2b is 122mm tall).
hujintao said:
i just know the euro version is 448MB RAM + 512MB ROM but, t-mobile us is 576MB RAM + 1GB ROM.
Click to expand...
Click to collapse
The EU version also has 576MB RAM. It's just the ROM that's different.

It is 1.5mm taller. I'm not sure that it will not work on 3G in UK: from the specs it seems that it DOES support 2100MHz UMTS (band I) so it should work in Europe. Notice that the G1 had the same specs and many users reported success when used in Europe.

In that case the European ones should have worked in the US (still talking of 3G of course), but we know they don't...

kilrah said:
In that case the European ones should have worked in the US (still talking of 3G of course), but we know they don't...
Click to expand...
Click to collapse
No why should they? It is very simple to understand how 3G works in different place and with different phones:
T-mobile 3G network operates on UMTS band IV (i.e. 1700 MHz upload and 2100 Mhz download).
ATT operates on UMTS bands II and V (1900 MHz and 850 MHz).
Most European networks are UMTS band I (2100 MHz) and sometimes band VIII (900 MHz).
Now, the specs of TOMUS version of HD2 says that it works BOTH on band I and band IV. That is why it can work both on US T-mobile network and in Europe. It cannot work on the ATT 3G network though.
The EU version of HD2 works on bands I and VIII so it cannot work on either of US 3G networks.

alefsin said:
Now, the specs of TOMUS version of HD2 says that it works BOTH on band I and band IV
Click to expand...
Click to collapse
OK, hadn't seen that.

Here is the relevant part from the TMOUS HD2 specs:
Band (frequency): 850 MHz;900 MHz;1800 MHz;1900 MHz;UMTS: Band I (2100);UMTS: Band IV (AWS);UMTS: Band IV (1700/2100).
I'm living in US now but I'll move to Switzerland within a few months. I have ordered this phone for myself since I want to use in Europe.
Btw kilrah, maybe when I arrive in Zurich (that's where I'm going to live) I'll come and visit you

Unlocked TMOUS For Sale
I have one unlocked that I might sell if TMobile decides to charge me a restocking fee to return it. Given the demand I was thinking of selling it for $550usd.

T8185= EU, T9193 = AUS, which model is available in Asia?

I'm just a little bit confused. read up on a bunch of posts here that talks about the different models there are right now..
from what i've gathered
US t mobile = pretty much T8185 but with 1gh rom
EU = T8185
AU = t9193 with 850 band frequency coverage
so which version do retailers in asia carry?
thanks all.
cheers.

ok..I want to correct you...in europe the HTC HD2 is T8585

t8585 model

thanks for the help!

Determine Model of Phone?
I just received my HD2 from an internet retailer, and 3g doesn't work with T-mobile US.
In band selection it has 900 and 2100 as UMTS options and no mention of 1700.
How do I determine exactly which model I have in my possession? I'd like to have all the facts before I ***** these guys out and demand a new and correct phone.
I tried to check the radio and rom versions, but I couldn't see way to tell the versions apart.
ROM 2.10.531.1 (82076) WWE
Radio 2.08.50.08_2
Ram size 576mb

If you want a phone that is compatible with TMobile in the US, you need to buy it from... drumroll... TMobile in the US. No one else is compatible on their 3G net.
The TMoUS will have TMobile right across the top of the screen.
The 9193 will have NextG and "T" on the lower third of the back case.
The 8585 will be completely unbranded, as far as I know?

I'm living in Singapore, bought mine from starhub,
The model is T8585 and supports all frequencies [HSPA/WCDMA/GSM/GPRS/EDGE (900/2100/850/900/1800/1900 MHz)] , so it'll work everywhere

Qazz~ said:
I'm living in Singapore, bought mine from starhub,
The model is T8585 and supports all frequencies [HSPA/WCDMA/GSM/GPRS/EDGE (900/2100/850/900/1800/1900 MHz)] , so it'll work everywhere
Click to expand...
Click to collapse
You only have 3g on 900 and 2100 with that model, though. All the models have gsm working on all the bands, so you can get regular service everywhere.

mazzarin said:
If you want a phone that is compatible with TMobile in the US, you need to buy it from... drumroll... TMobile in the US. No one else is compatible on their 3G net.
The TMoUS will have TMobile right across the top of the screen.
The 9193 will have NextG and "T" on the lower third of the back case.
The 8585 will be completely unbranded, as far as I know?
Click to expand...
Click to collapse
Thanks for the info mazzarin,
Somehow 3g started working.... maybe I just needed to leave the house. 3g was showing in the status bar before, but failing to connect. My phone says T-mobile across the top, and the UPC on the box seems to be a US phone; however, under settings-->wireless control-->phone-->Band it still lists UMTS (2100+900 as an option), which doesn't make sense.
Any idea what this means?

MrBunnyWab said:
Thanks for the info mazzarin,
Somehow 3g started working.... maybe I just needed to leave the house. 3g was showing in the status bar before, but failing to connect. My phone says T-mobile across the top, and the UPC on the box seems to be a US phone; however, under settings-->wireless control-->phone-->Band it still lists UMTS (2100+900 as an option), which doesn't make sense.
Any idea what this means?
Click to expand...
Click to collapse
The Telstra 850+2100 phones say the same thing. Just ignore it. The bands are determined by the hardware amplifier circuits on the phone anyway. You have the TMOUS HD2, so you are fine. (Other than their tiny network )

The network may be tiny, but 2mb/s down and 1 up is pretty good. Coming from AT&T service, I'm impressed with the speed. Now I can't just leave any major city

*deleted msg, see below*

Qazz~ said:
I'm living in Singapore, bought mine from starhub,
The model is T8585 and supports all frequencies [HSPA/WCDMA/GSM/GPRS/EDGE (900/2100/850/900/1800/1900 MHz)] , so it'll work everywhere
Click to expand...
Click to collapse
zarathustrax said:
You only have 3g on 900 and 2100 with that model, though. All the models have gsm working on all the bands, so you can get regular service everywhere.
Click to expand...
Click to collapse
k..im confused
here in canada, rogers uses 850/1900 for the 3G
if i get an unbranded T8585 from asia, will it support the 850/1900 for 3G?

kl25 said:
k..im confused
here in canada, rogers uses 850/1900 for the 3G
if i get an unbranded T8585 from asia, will it support the 850/1900 for 3G?
Click to expand...
Click to collapse
im not looking this up to double check, ill leave that to you but I think the telstra works in canada.

samsamuel said:
im not looking this up to double check, ill leave that to you but I think the telstra works in canada.
Click to expand...
Click to collapse
yea i know about telstra..but as you may also know..its very expensive..close to $850 canadian
maybe i should be more clear with my question..and that's getting a t8585 from hong kong specifically, or anywhere else in china for that matter..

ahh yea, the price factor. well as already mentioned by zarathustrax the t8585 (same in europe as asia, , same phone, same bands )only does UMTS on 900/2100, so no 3g, edge only i'm afraid.

samsamuel said:
ahh yea, the price factor. well as already mentioned by zarathustrax the t8585 (same in europe as asia, , same phone, same bands )only does UMTS on 900/2100, so no 3g, edge only i'm afraid.
Click to expand...
Click to collapse
that really sucks...canada is always the slowest at getting good phones...
i guess i just have to wait it out and see if anyone will sell the telstra at a good price..cant believe some ppl spent $900 on that phone... :S

can i use t mobile htc hd 2 in australia

hi every one im thinking about buying a tmous htc hd 2 cause of the 1gb rom 576 mb ram , im just wandering if the phone will work in australia 3g , vodafone , i found out download band for voda is 2100 and upload 900
can some one shed any light on this should i buy the tmous htc hd 2 or t8585
thanks in advance

No, The T-Mo US HD2 won't work on those 3g bands. You want the t8585.

Or the 9193. which is the AU model that will work with ATT USA 850 band 3g

thanks for the reply whats the differnece in having 1gb rom

jeewadj said:
thanks for the reply whats the differnece in having 1gb rom
Click to expand...
Click to collapse
Rom = The amount of storage on your phone for contacts, music, movies etc.

T9193 - Vodafone Australia
im using the t9193. Im with vodafone. "3G" "H" "E"
I get great speeds

b84 said:
im using the t9193. Im with vodafone. "3G" "H" "E"
I get great speeds
Click to expand...
Click to collapse
I'm very surprised to hear that your 9193 locks onto an H or 3G icon with Vodafone. EDGE, sure, but that's 2.5G data, not 3G.
The 9193 supports 3G/HSDPA on 850 and 1900MHz
The 8585 supports 3G/HSDPA on 900 and 2100MHz
Everything I've read about Vodafone points to them using 900 & 2100MHz bands for 3G/HSDPA.

band
i am using 900 2100
i used a cab to add more bands

BAAAAHAHAHAHAHAHAHA!! ROFLMAO
You're an idiot, stop posting misinformation.

If you use Telstra then you need the t9193 model but if you use any other provider you will need the t8585 model to be able to access the full 3G service, I could be wrong but that's what caught me out.

I am on Vodafone and I have the T8585 with H E 3G & G bands via 900/2100.
gamecore is correct T9193 for Telstra, and T8585 for others eg Vodafone etc...

ok i am new to this but can someone tell me what's the different between
the
T8585 and the T9193 (i know that the T8585 is the one with the 512 rom) so is the T9193 the telstra verson of the HD2?
i am going to america next month and just to make things clear
(i am on optus)
if i want to buy a HD2 with the 1GB ROM it won't work in Aus ?
so should i buy the normal verson of the phone (T8585)?
if i just want to use the phone for call,text,mms (no internet browsing) can i get the 1GB one ? or would i still get the T8585?
so if i want the phone to be able to use the internet(not wifi) "on the go" and check e-mail i will need to get the T8585 right ? ( the one with less rom?)

STHD said:
ok i am new to this but can someone tell me what's the different between
the
T8585 and the T9193 (i know that the T8585 is the one with the 512 rom) so is the T9193 the telstra verson of the HD2?
i am going to america next month and just to make things clear
(i am on optus)
if i want to buy a HD2 with the 1GB ROM it won't work in Aus ?
so should i buy the normal verson of the phone (T8585)?
if i just want to use the phone for call,text,mms (no internet browsing) can i get the 1GB one ? or would i still get the T8585?
so if i want the phone to be able to use the internet(not wifi) "on the go" and check e-mail i will need to get the T8585 right ? ( the one with less rom?)
Click to expand...
Click to collapse
STHD,
A brief lesson in mobile phone protocols, and which model supports what:
T8585 & T9193
Worldwide
GSM, 850/900/1800/2100MHz
GPRS, 850/900/1800/2100MHz
EDGE, 850/900/1800/2100MHz
T8585
Australia (Voda, Optus), Europe, Asia
3G/UMTS, 900/2100MHz
HSDPA, 900/2100MHz
T9193
Telstra AU, USA (most), Japan (I think)
3G/UMTS, 850/1900MHz
HSDPA, 850/1900MHz
So,
Both the T8585 & T9193 can use the following services worldwide, on any carrier that uses the GSM (NOT CDMA!) mobile network:
* Calls
* SMS
* MMS, assuming you have some sort of data plan supporting GPRS or better.
* Mobile web & email, but only at GPRS (data rates of 56-114 kbit/s) or EDGE speeds (up to 236.8 kbit/s).
The T9193 supports 3G/HSDPA on 850 and 1900MHz - Telstra & most US carriers use these frequencies for 3G data.
The 8585 supports 3G/HSDPA on 900 and 2100MHz - Most European, Asian and all other Australian providers use these frequencies for 3G data.
See http://en.wikipedia.org/wiki/Template:Mobile_telecommunications_standards for a heirachical view of the technologies.
Three key points here:
1) You can't (AFAIK) buy the T8585 model from a network provider in the USA. They will all be T9193 models.
2) If you're *visiting* the USA, and indend to to use the phone on Optus when you return, buy the T8585 model from somewhere in Asia or Europe (http://Handtec.co.uk is my personal recommendation). You can still use the phone when you go to the USA for calls, sms, and gprs & edge data, and get full 3G/HSDPA speeds when you come home to Optus.
3) Ignore the 1GB Flash ROM on T9193 model. The T8585 comes with an 8GB SD card - just install all your apps on the card. This has the additional benefit that you don't need to re-install every time you flash another ROM.
Make sense?
Phrak

So basically you need the T8585 for Optus.
If you get the T9193 for optus network you can do everything that the T8585 does but you wont be able to use 3G it will only be 2G or slower for web and emails on your phone.

ok thanks Phark that really help me out working out the issues
just to point something out from Phark post
T8585 Should be T9193/T-mobile verson
Telstra AU, USA (most), Japan (I think)
3G/UMTS, 850/1900MHz
HSDPA, 850/1900MHz
not picking on you (Phark) but just want to make sure everyone gets it or else it will be confusing (am i right?lol)
but another thing is that on the htc website it says that the aus verson (T9193) of hd2 uses "Australia: 850/2100 MHz" i donno if the info is wrong or what...
Also T-mobile and [HD2 US(from PDAdb)comming soon] have 576Mib of Ram which is 100 something more then T8585
So i guess i will get the T8585(Will get that in HK)
Haha and i really like how Phark quote *visiting* USA...but i am really going there Haha
Thanks again Phark and also thanks gamecore

STHD said:
ok thanks Phark that really help me out working out the issues
just to point something out from Phark post
T8585 Should be T9193/T-mobile verson
Telstra AU, USA (most), Japan (I think)
3G/UMTS, 850/1900MHz
HSDPA, 850/1900MHz
not picking on you (Phark) but just want to make sure everyone gets it or else it will be confusing (am i right?lol)
Click to expand...
Click to collapse
Ooops! Copy & Paste error ;-) Thanks, have edited my post.
STHD said:
but another thing is that on the htc website it says that the aus verson (T9193) of hd2 uses "Australia: 850/2100 MHz" i donno if the info is wrong or what...
Click to expand...
Click to collapse
Unsure about that one, sorry. Everything I've read (up 'till now!) suggests that the T9193 was 850/1900 - *Do* take HTC's word over mine though, you can always claim false advertising against them ;-)
STHD said:
Also T-mobile and [HD2 US(from PDAdb)comming soon] have 576Mib of Ram which is 100 something more then T8585
Click to expand...
Click to collapse
The T8585 *does* have 576MB of RAM, enabled via most ROM Chefs. I'm unsure of the technical changes to enable this, but I've just (double) checked my T8585 HD2 from HK, and it says: "RAM: 576MB; Flash Size: 512MB"
STHD said:
Haha and i really like how Phark quote *visiting* USA...but i am really going there Haha
Thanks again Phark and also thanks gamecore
Click to expand...
Click to collapse
LOL, I meant "visiting" in the sense that you weren't moving there permanently ;-)
Glad I could help. Have a safe trip, and good luck buying your phone in HK!
Phrak

Oh so you brought your phone from HK too? is that through the internet?
Or Do you have a shop that you recommend?(cos i know they sell phones everywhere) i live near mongkok and they have a whole street which sell phones
Thanks anyway

hd2 telstra t9193 - Vodafone Australia
Hey Phrak,
This is the cab i used for geting the extra bands
http://htcpedia.com/forum/showpost.php?p=57342&postcount=6
is this the correct band for Vodafone Australia?
UMTS(900+2100)+GSM(900+1800)
If not what should it say???
Is there a hardware difference that the t9193 will not have the correct data connection? Or is it just software?

Interesting CAB - I've just found the same software built into the latest ENERGY ROM I've flashed to my Leo.
More research is needed methinks. I'm more than prepared to be proven wrong on the T9193 supported bands.

[Q] [Apr 7] Motherboard compatibility

Good day guys. I need your help. I want to replace my motherboard because processor wont work properly(freezes, green screens etc.). So i want to know, is there any difference between international ver. of hd2 motherboard and T-mobile version, and could I buy T-mobile motherboard and replace it in my international hd2. If it is possible, so i want to buy this motherboard
cgi.ebay.com/HTC-HD2-Unlocked-100-Working-motherboard-only-/230603065490?pt=Cell_Phones&hash=item35b1038892
(and if you will find some analog, please let me know)
Thank you for helping.

I believe the T-Mobile motherboard/main board is slightly larger in size to the international HD2 do to the more rom space and things on the T-Mobile version. So you can probably interchange a international main board with a T-Mobile HD2n but I don't know about a T-Mobile main board in a international HD2 as the actual outer casing is smaller than the T-Mobile.

Thank you for fast answer T-Macgnolia. I was thinking about it(i mean different sizes etc) but may be it's still possible, i mean ... its probably my last chance, so if you are don't know, for sure there is someone else, who tried this and know that it works, or know for certain that it's impossible. But anyway i need to replace it, doesn't matter t-mobile or international ver. of mainboard. I just couldn't find international ver. yet. So guys if you have any links of selling this motherboard, please let me know(doesnt matter where, may be in europe too).

I've got the same problem and I've done some research on it, but I'm still not really sure whether or not the international motherboard can be replaced by the T-Mobile one.
Here's what I found out:
(quotes from another web-site)
"Memory:
T-Mobile HD2: 576MB RAM, 1GB ROM
HTC HD2: 448MB RAM, 512MB ROM
The T-Mobile HD2 has a 128MB RAM advantage over the HTC HD2 if we are talking about the stock specs. Latest developments demonstrated that the International HD2 has the same amount of physical RAM, but the additional 128MB has been hidden and thus unavailable, but unlocked via applying custom ROMs.
As far as ROM is concerned, the T-Mobile HD2 has twice as much storage memory than the international HD2, mainly because of the customizations the operator version has (not to mention the Entertainment package including Barnes & Noble eReader, Blockbuster on Demand - Blockbuster’s first-ever video download application on a smartphone, MobiTV, Gogo Inflight Internet Services - six month trial for inflight wifi services on over 2,500 daily U.S. flights and Slacker Radio)."
"Bands:
T-Mobile HD2: WCDMA/HSPA: 1700 MHz (AWS) / 2100 MHz, GSM: 850/900/1800/1900 MHz.
HTC HD2: Europe: HSPA/WCDMA: 900/2100 MHz, GSM: 850/900/1800/1900 MHz. Asia Pacific: HSPA/WCDMA: 900/2100 MHz, GSM: 850/900/1800/1900 MHz.
Main difference here is the one and only vital one: the T-Mobile HD2 supports the 1700 MHz band not supported by the International HD2. Additionally, we've posted about how to get AT&T 3G speeds with imported Telstra HD2 from Australia, which supports UMTS 850Mhz."
But still there's one thing that makes me still hope the international version can run with the T-Mobile MB: regardless the fact that the T-Mobile version is 1.5mm taller they both weight 157 grams and plus to that, I think it would be smart move to manufacture the other phone parts in such a way that they would fit both versions.
I hope I'm gonna get some answers from a couple of GSM services I've contacted lately and get back to you with the answers. Brace yourself! =]

spnk said:
I've got the same problem and I've done some research on it, but I'm still not really sure whether or not the international motherboard can be replaced by the T-Mobile one.
Here's what I found out:
(quotes from another web-site)
"Memory:
T-Mobile HD2: 576MB RAM, 1GB ROM
HTC HD2: 448MB RAM, 512MB ROM
The T-Mobile HD2 has a 128MB RAM advantage over the HTC HD2 if we are talking about the stock specs. Latest developments demonstrated that the International HD2 has the same amount of physical RAM, but the additional 128MB has been hidden and thus unavailable, but unlocked via applying custom ROMs.
As far as ROM is concerned, the T-Mobile HD2 has twice as much storage memory than the international HD2, mainly because of the customizations the operator version has (not to mention the Entertainment package including Barnes & Noble eReader, Blockbuster on Demand - Blockbuster’s first-ever video download application on a smartphone, MobiTV, Gogo Inflight Internet Services - six month trial for inflight wifi services on over 2,500 daily U.S. flights and Slacker Radio)."
"Bands:
T-Mobile HD2: WCDMA/HSPA: 1700 MHz (AWS) / 2100 MHz, GSM: 850/900/1800/1900 MHz.
HTC HD2: Europe: HSPA/WCDMA: 900/2100 MHz, GSM: 850/900/1800/1900 MHz. Asia Pacific: HSPA/WCDMA: 900/2100 MHz, GSM: 850/900/1800/1900 MHz.
Main difference here is the one and only vital one: the T-Mobile HD2 supports the 1700 MHz band not supported by the International HD2. Additionally, we've posted about how to get AT&T 3G speeds with imported Telstra HD2 from Australia, which supports UMTS 850Mhz."
But still there's one thing that makes me still hope the international version can run with the T-Mobile MB: regardless the fact that the T-Mobile version is 1.5mm taller they both weight 157 grams and plus to that, I think it would be smart move to manufacture the other phone parts in such a way that they would fit both versions.
I hope I'm gonna get some answers from a couple of GSM services I've contacted lately and get back to you with the answers. Brace yourself! =]
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T-Mobile is strange about sizes and custom phone cases. My previous phone was a TP2, and the T-Mobile version had a completely different case and front, for no reason that I could see except looks.

So, I got some answers. All of them conclude the fact that it's impossible to use a T-Mobile MB on an international version!
Reasons why:
- the T-Mobile motherboard is longer, so you'll have to rethink how to attach the motherboard to the housing;
- on the international version the flex cables and all the other cables are soldered to the motherboard, while on the T-Mobile version they're connected through various connectors.
Bad news, bad news...well all you can do now is hope to find a used and working motherboard, buy a phone with a broken screen or something else (those cost as much as a used MB) or sell the phone for parts...
Good luck! I'm gonna need it too ;]

Hey spnk! Thank you so much for help and your great research!
I had a thoughts like that, but still got a hope ^_^. However now the story has ended.
I've bought a new one from taobao, costs much cheaper than on ebay(ofcourse it's chinese assembled, but it says "made in taiwan" , so i dont know anything about "makers", but it's well built).
I left old, "broken" one for parts. Who knows, may be it will be usefull.
I hope that you've solved problem with your's.
Best wishes.