Database Users

t9193 vs. t8185

I couldn't help myself and bought a new T8185 a few weeks ago and i'm in love with this phone. I have it on ATT in new york. Now i hate myself for not having any patience and now the newer model is out. A few questions now about the euro t8185 HD2 in america now that the t9193 is out.
1. Is the hardware the same as the original t8185?
2. Is the t8185 now able to be flashed with a new ROM enabling it to use 850mhz 3g/hspa in the u.s. i.e. 3g on att?
p.s. sorry if its a noob question, im new to the world of HTC and win mo, but i did not see any other articles regarding this situation. thanks for your help.

1) Yes, the hardware* is the same inside and out.
2) AFAIK, 3G radio is hardware dependent. You can flash all the different radios you want, but unless the hardware has that specific frequency, you wont be getting any 850mhz 3G. Meaning, the Euro (t8185) version will not receive AT&T 3G/UMTS because it doesn't have the correct radio hardware.
* except for the radio.

doubledrake20 said:
I couldn't help myself and bought a new T8185 a few weeks ago and i'm in love with this phone. I have it on ATT in new york. Now i hate myself for not having any patience and now the newer model is out. A few questions now about the euro t8185 HD2 in america now that the t9193 is out.
1. Is the hardware the same as the original t8185?
2. Is the t8185 now able to be flashed with a new ROM enabling it to use 850mhz 3g/hspa in the u.s. i.e. 3g on att?
p.s. sorry if its a noob question, im new to the world of HTC and win mo, but i did not see any other articles regarding this situation. thanks for your help.
Click to expand...
Click to collapse
1. NO
2. NO
Keep in mind:
t8185 designed for EU market but compatible gsm with usa ATT for partial functionality.
t9193 designed for AU/Asian market but compatible gsm & maybe 3g WITH USA att, but ROM dependent to accomplish that. You won't get stable 3g WITH telstra rom, but need customized rom.
t9193 hardware is NOT compatible for T-Mobile, at least no released model I know of yet.
HTC HD2 coming to T-Mobile, supposedly in March 2010. (probably a different htc model number)
Rumors are HTC HD2 coming to Sprint ( possibly android os model) & Verizon (as wm os) sometime in future. att...who knows?
Radio rom upgrades can sometimes improve your experience, but only within the limits of your hardware.
ROM upgrades cannot change the hardware compatibitity for a given signal. You must change chip inside the device for that.
ROM upgardes or customizing rom can improve your experience with your given hardware signal compatibility. (e.g. bug fix that improves signal problem)
Hold on to your t8185 until usa versions of the htc HD2 hit the market. Then, you'll have options. (e.g. change phone or change providers or both)
If htc HD2 is really a big hit in usa, then expect most providers to have it or a hardware variation of it, later this year.

Hello Everyone,
Anyone know the model number for the USA T-Mobile Version?
Thank you ,
Monnie

thanks for the info devilduck, i can't switch contracts till mid 2011 so i really wanted 3g with my current provider, at&t. Guess i'll just have to switch to 9193 eventually.
And to monnie, i dont think they have the model number out just yet.

'Imaging' one HD2 to another

I travel a lot and am sick of the 850MHz/900Mhz limitation on the HD2 models. I currently own a UK 850MHz HD2 and was thinking of buying a Telstra 900Mhz HD2 on ebay, then maintaining both models and taking the appropriate model to suit the networks in the location I'm travelling to. To make this practical I need to know the process and tools (if they exist) to easily image all the apps and files from one unit to the other.
My current T8585 model is running stock HTC UK ROM. Would I need to flash the Telstra models ROM? Can the T8585 stock ROM be simlpy flashed to the Telstra model even though the Radio hardware is different ?
Any info appreciated ...

NewMagic said:
I travel a lot and am sick of the 850MHz/900Mhz limitation on the HD2 models. I currently own a UK 850MHz HD2 and was thinking of buying a Telstra 900Mhz HD2 on ebay, then maintaining both models and taking the appropriate model to suit the networks in the location I'm travelling to. To make this practical I need to know the process and tools (if they exist) to easily image all the apps and files from one unit to the other.
My current T8585 model is running stock HTC UK ROM. Would I need to flash the Telstra models ROM? Can the T8585 stock ROM be simlpy flashed to the Telstra model even though the Radio hardware is different ?
Any info appreciated ...
Click to expand...
Click to collapse
I'm assuming you're talking about 3G (because all HD2s have quadband for voice)? If you are, I'm sure you got the bolded part mixed up.

Yes - 3G. My current T8585 model supports 900MMHz and 2100MHz, the Telstra model supoprts 850MHz and 2100MHz.

No, I don't think it's safe to flash an hd2 with a stock rom not meant for it.

lude219 said:
I'm assuming you're talking about 3G (because all HD2s have quadband for voice)? If you are, I'm sure you got the bolded part mixed up.
Click to expand...
Click to collapse
Yeah, the 850 band is on the telstra t9193 for 3g, while the 900 band is on t8585 euro models.
Anyways, yes, you could get both models and flash them both with the same custom rom (you would have to put hspl on both, I would think, otherwise each model can only use stock roms prepared for each model, and there might be slight differences.)... then just use a back app to back up one, and restore the backup on the other.

[Q] HTC Wildfire + Radio image question

Hi
I have recently purchased an HTC Wildfire A3335. For those of you don't know, this is a special version of the Wildfire which has a UMTS 850/2100 Radio. Anyway this phone seems only to be available heavily branded through an Australian operator, Telstra.
Due to the hideousness of the branding, I naturally wanted to get rid of it. This was pretty easy-- Cool-- I now have an unbranded wildfire A3335.
Now, when it was flashing (using an HTC RUU exe) I noticed that it was "Reflashing the radio". I freaked out. I know this phone has a special radio in it and of course the unbranded RUU is for the 900/2100 UMTS version (A3333).
So as expected the phone has lost its very special 850MHz UMTS and now only works at 2100MHz (I doubt the phone has suddenly gained the ability to use 900MHz UMTS as it has the wrong chips in it)
The Radio image for this phone is available inside the Telstra RUU on shipped-roms.
My question. Is it possible to extract the radio image out of that and flash it in with the rest of the unbranded system? And hopefully get my 850MHz UMTS back. Currently it appears that the answer to this is no due to the lack of signing?
Current HBOOT: 0.80-0007
Current ROM HTC Standard (Eclair 2.1) 1.37

You can't lose or gain any frequencies by flashing the radio, it's in the hardware...

OK firstly, I did lose 850MHz when flashing the standard image on, so you definitely can lose (but never gain)
The Radio PHY in the phone will be split into two parts, the 2100MHz part and the 850MHz part (or a 900MHz part).
So on the normal wildfire radio image, there's a driver which is likely compiled to drive a 2100/900 radio, and when we run that image on the 2100/850 phone, 2100 remains working because this part of the chip is identical. The 850MHz part dies completely because this driver is not expecting it.
I know how lazy microcode developers are - it's very rare for anyone to go to the effort to make microcode images to support two subtley different chips, instead they will compile two versions of the microcode with subtle changes for each one. Only one bit in a register need be set wrong and the whole lot comes crashing down!
Now there could be a scenario where the radio is a 100% hardware solution, and there is no microcode for the UMTS radio, in which case there's a better chance that having the wrong radio image is not an issue, as the chips themselves are more autonomous. But then - What does the radio image do? In my experience of working with 802.11 Radio PHYs: Not likely. These chips are almost always highly software driven and must be running the correct code to fully function.

Okay so it looks like I just became the "expert" on this one and can now answer my own question.
It is possible to restore the original Telstra radio image, without rebranding the phone using the Telstra RUU.
This is what I did:
1) Download Telstra RUU from shipped-roms
2) Extract radio.img using this process: http://lukasz.szmit.eu/2010/04/extracting-rom-files-from-htc-android.html
3) Repacked radio.img into an update.zip
4) Signed update.zip using http://android.modaco.com/content/software/313829/pc-tool-zip-signer-v1-1/#entry1348449
5) Manually added com/google/android directory into META-INF directory in ZIP file (Copied from someone else's radio image.
6) Flashed image using clockworkmod "update sdcard" menu (unrevoked had already installed clockworkmod)
Done! I've got my 850MHz back again!
I've included the update.zip with the Telstra wildfire radio image here: http://xpander.inaxeon.com/data/files/update.zip
It's interesting looking around the various forums, I think a lot of people have been willy nilly flashing the wrong radios onto their special 850MHz devices then not fully understanding why their phones are without 3G coverage a lot of the time. Oops!

Interesting, last time I checked the radios were identical. I must have missed something. I'll try cross flashing the Telstra A3335 radio on the 900/2100mhz A3333 and see what happens, 3G up here in Canada runs on 850/1900, getting 3G on one of the 2 bands would be nice.
Edit: It's the same as the other radio of the same version 13.45.55.24/3.35.15.31 , did a checksum against the HK_CHT one (cid HTC__622, a A3333)
Maybe the "H" in the version have something to do with the frequencies? ie: Radio_13.55.55.24H_3.35.20.10 from the Froyo WWE rom.

Did you not read my second message!
Unless you have an A3335 flashing the Telstra radio is going to make your phone even worse!
The full solution for 850MHz UMTS requires:
A) The right hardware: (Wildfire A3335)
B) With the right software: The Telstra "Radio_13.45.55.24_3.35.15.31" is currently the only radio image in existance which can correctly drive the A3335, and in no circumstances should be flashed on anything other than the A3335!
Likewise - If you have an A3333
Do not flash the Telstra radio image on it, as it is the wrong code. You'll end up losing your 900MHz UMTS in the process (OK so that doesn't matter too much in Canada)
To say it even simpler:
Every radio image except Telstra is OK for use on the A3333
The A3335 must be running the Telstra radio image
Telstra Radio_13.45.55.24_3.35.15.31 is a special piece of software for a special piece of hardware!
EDIT: Kwen has checksumed the A3333 and A3335 images of Radio_13.45.55.24_3.35.15.31 and found them to be identical. This confirms that this paticular version supports both 850/2100 and 900/2100 phones, whilist newer versions do not. See more recent posts.

i have a telstra wildfire which i have wildpuzzle v.08 running on, with putting a new rom on i would presume i have a different radio, am i correct. yet i can get 3g and wcdma/hsdpa no problems. or am i confusing myself

Thanks for this. I'm going to keep the update.zip safe just incase.
I've just imported an A3335 to use on the Telecom XT network here in NZ and I just flashed it with DK's rom (shame that I'm still stuck with the Telstra splash screen).
Although 850MHz is the primary band Telecom uses for their network they also have 2100MHz fallback in my location, so I'm not 100% sure what band the phone is running on.
Is there a service menu or an app on the marketplace I can use to check the band for peace of mind?
Thanks again.

inaxeon said:
Did you not read my second message!
Unless you have an A3335 flashing the Telstra radio is going to make your phone even worse!
The full solution for 850MHz UMTS requires:
A) The right hardware: (Wildfire A3335)
B) With the right software: The Telstra "Radio_13.45.55.24_3.35.15.31" is currently the only radio image in existance which can correctly drive the A3335, and in no circumstances should be flashed on anything other than the A3335!
Likewise - If you have an A3333
Do not flash the Telstra radio image on it, as it is the wrong code. You'll end up losing your 900MHz UMTS in the process (OK so that doesn't matter too much in Canada)
To say it even simpler:
Every radio image except Telstra is OK for use on the A3333
The A3335 must be running the Telstra radio image
Telstra Radio_13.45.55.24_3.35.15.31 is a special piece of software for a special piece of hardware!
Click to expand...
Click to collapse
It made no difference, couldn't tell if I lost the 900Mhz, couldn't get the 850Mhz for sure.
I tried playing in the Field test menu to switch between GSM Only to WCDMA Prefered/Only and the Band selection menu and completly lost access to GSM, it was stuck on WCDMA Only, had to do a nand restore (nothing to do with the radio version)
I'm not sure if the Radio_13.45.55.24_3.35.15.31 is exclusive to the A3335, most of the roms uses it:
Vodafone SPA
H3G ITA
HTC WWE
HTC Asia India
HTC Asia WWE
HTC Asia HK CHT (that's my phone and it'ss a A3333)
H3G UK
HTC Asia TW
HTC FRA Bouygues
HTC WWE Tesco
Vodafone DE
How did you find out which band your Wildfire was using? (or did you just not have any signal?)

Kwen said:
How did you find out which band your Wildfire was using? (or did you just not have any signal?)
Click to expand...
Click to collapse
Pretty easy. My operator has no GSM (at all) or 2100MHz sites where this phone is most commonly used. When the alternate radio was flashed on, the phone flat out lost all connectivity to the network. It only returned when the phone was driven to a place known to have 2100MHz coverage. That was a pretty damning and poignant confirmation.
About the versions of the Radio, When I was first considering flashing the RUU I had already been concerned about the radio image and checked the version. I saw that it was used in other A3333 targetted images so assumed that the radio images were not phone specific. Turns out I was wrong.
What would be interesting is to checksum compare Radio_13.45.55.24_3.35.15.31 from Telstra vs. other images. If they are identical, then we know that this particular version supports both style of radios, in which case it is safe for both versions. The reason I've always been qualifying that version "Telstra" is in the fear that they are different despite the identical version number.
Short of actually being a hard core hacker or HTC engineer, It's a bit hard to tell really. All one can really do is share their experiences.

I can confirm thier identical checksum (I checked against another one - not all the versions lol)

another special version of the WF
Hey man, I have a wildfire which runs on these frequencies GSM/GPRS/EDGE: 850/900/1800/1900 MHz and HSPA/WCDMA 850/1900 MHz.
I was going to flash a stock RUU till I read your post, so I wanted to thank you for saving my precious 3g!

juanchotolas said:
Hey man, I have a wildfire which runs on these frequencies GSM/GPRS/EDGE: 850/900/1800/1900 MHz and HSPA/WCDMA 850/1900 MHz.
Click to expand...
Click to collapse
What the heck model is that!
I understand HTC may have a provision for 850/1900 (Model A3334) But as far as I knew that never went into production due to lack of interest from operators. Or is this a fruity variant of one of the new Wildfire S models?
EDIT: As bought to my attention by juanchotolas - it appears that the 850/1900 A3334? (Awaiting confirmation of the exact model number) may exist after all. It leads a low key existance in Latin America sold under an obfuscated difficult-to-google-for name. It's called "Desire A" but it's really a Wildfire. Here's the little beasty: http://www.htc.com/la/product/htc-desire-a/overview.html

fahrenheit451 said:
Thanks for this. I'm going to keep the update.zip safe just incase.
I've just imported an A3335 to use on the Telecom XT network here in NZ and I just flashed it with DK's rom (shame that I'm still stuck with the Telstra splash screen).
Although 850MHz is the primary band Telecom uses for their network they also have 2100MHz fallback in my location, so I'm not 100% sure what band the phone is running on.
Is there a service menu or an app on the marketplace I can use to check the band for peace of mind?
Thanks again.
Click to expand...
Click to collapse
I've spent many an hour searching for such an application and one does not seem to exist. Post one here if you find one.
The phone I've been working on was a present for my sister is also used on Telecom XT, I bought it due to the spectacularly average range of phones available at the time through Leading Edge, hence my burning desire to remove the Telstra branding.
You can imagine how incredibly silly I felt when it arrived, she powered it up and it couldn't connect to XT. The thing that's made it extra frustrating is that I live in the UK and was originally working on the phone from here. The UK only has 2100MHz UMTS so couldn't test properly before posting. I've had to do all of this reflashing over the phone and with remote access from the other side of the planet!
Anyway, If you flash the most recent 2.1 RUU (not 2.2) then reflash the radio I posted, you can achieve a fully unbranded A3335 on XT.
You're fortunate to have 850MHz UMTS over there, No one offers sub 1GHz 3G here and it stinks! I used XT for a few weeks while I was back for Xmas and it was an amazing service (If you can get over the cost). You can't have service like that on any network here. Green with envy.

inaxeon said:
I've spent many an hour searching for such an application and one does not seem to exist. Post one here if you find one.
The phone I've been working on was a present for my sister is also used on Telecom XT, I bought it due to the spectacularly average range of phones available at the time through Leading Edge, hence my burning desire to remove the Telstra branding.
You can imagine how incredibly silly I felt when it arrived, she powered it up and it couldn't connect to XT. The thing that's made it extra frustrating is that I live in the UK and was originally working on the phone from here. The UK *only* has 2100MHz UMTS so couldn't test properly before posting. I've had to do all of this reflashing over the phone and with remote access from the other side of the planet!
Anyway, If you flash the most recent 2.1 RUU (not 2.2) then reflash the radio I posted, you can achieve a fully unbranded A3335 on XT.
You're fortunate to have 850MHz UMTS over there, No one offers sub 1GHz 3G here and it stinks! I used XT for a few weeks while I was back for Xmas and it was an amazing service (If you can get over the cost). You can't have service like that on any network here. Green with envy.
Click to expand...
Click to collapse
I was attracted to DK's rom because he made mention that the radio was left untouched (or optional to flash). So I'm fairly certain I'm running the original Telstra radio. I just can't be certain.
Would like to flash the 2.1 RUU and then back to DK again to get rid of the splash screen but for me, all that risk isn't worth the vanity. Like you, the phone isn't mine. It was bought for someone else but I'm responsible for its up-keep.

fahrenheit451 said:
I was attracted to DK's rom because he made mention that the radio was left untouched (or optional to flash). So I'm fairly certain I'm running the original Telstra radio. I just can't be certain.
Would like to flash the 2.1 RUU and then back to DK again to get rid of the splash screen but for me, all that risk isn't worth the vanity. Like you, the phone isn't mine. It was bought for someone else but I'm responsible for its up-keep.
Click to expand...
Click to collapse
I'm all about the vanity! I even replaced its plasticwork to remove the logos from the case and posted it in a London issue Wildfire box (had one spare). There is not a single Telstra logo anywhere on this puppy! I think I'd be pretty comfortable in assuming that it's the only fully software/physically unbranded unit in the country- pretty satisfied with that!
The ROM and the Radio are two different components. You should never overwrite a radio by flashing just a ROM.
There's only two (maybe 3) ways you'll ever end up overwriting the Radio on an HTC phone:
1) Flashing an HTC RUU
2) Explicitly flashing a radio update with Clockworkmod.
3) It is theoretically possible for ROMs to include Radio updates but I've never seen a third party ROM contain a radio image. With maybe a small number of exceptions, ROM developers generally aren't going to risk deploying radios with their releases.
Of course you can easily find out by examining the contents of the META-INF/com/google/android/update-script file in the ZIP archive. If there's any mention of "Radio" in there then avoid it on exotic models like A3335

-strike off. the radio build might be different - there might be radios with partial coverage-

inaxeon said:
What the heck model is that!
I understand HTC may have a provision for 850/1900 (Model A3334) But as far as I knew that never went into production due to lack of interest from operators. Or is this a fruity variant of one of the new Wildfire S models?
Click to expand...
Click to collapse
This is the "Latin-american" Wildfire it is called Desire A (but we know it's a wildfire...) Here is the translated link so you can check it out http://translate.google.com/transla...la/product/htc-desire-a/overview.html&act=url

juanchotolas said:
This is the "Latin-american" Wildfire it is called Desire A (but we know it's a wildfire...) Here is the translated link so you can check it out http://translate.google.com/transla...la/product/htc-desire-a/overview.html&act=url
Click to expand...
Click to collapse
850/1900, those are freq used in Canada!
Here's the Mexican carrier's page:
http://www.iusacell.com.mx/New_Site/Equipos/

inaxeon said:
You're fortunate to have 850MHz UMTS over there, No one offers sub 1GHz 3G here and it stinks! I used XT for a few weeks while I was back for Xmas and it was an amazing service (If you can get over the cost). You can't have service like that on any network here. Green with envy.
Click to expand...
Click to collapse
whats so special about sub ghz 3g? Anyway werent o2 meant to be starting to use 900 mhz
Sent from my GT-P1000 using XDA App

Hd2 on at&t

I have a hd2 tmobile usa version, i need a At&t friendly Nand rom. Whats the best rom out there for At&t????
Sent from my Desire HD using XDA App

as far as I know any NAND Android ROM should work on AT&T as it is not the ROM that controls this but a combination of you sim card, APN settings, and you having your HD2 sim unlocked. Wait for more replies though as I do not use AT&T and it might actually be a ROM out there that has certain things adjusted for AT&T, but what that might be I do not know.

This is true, the ROM does not control the radio. There are methods of flashing the radio to a different version, one that may work for the AT&T 3G bands. I am looking them up, but that is how you would flash the device to change the radio.
Hardware wise, the GSM module does support all world wide bands but what makes then different from one HD2 from one carrier ot another is the firmware version that is used in the phones that make them work on the network's bands. Correct me if i am wrong though.

TKETZ196 said:
This is true, the ROM does not control the radio. There are methods of flashing the radio to a different version, one that may work for the AT&T 3G bands. I am looking them up, but that is how you would flash the device to change the radio.
Hardware wise, the GSM module does support all world wide bands but what makes then different from one HD2 from one carrier ot another is the firmware version that is used in the phones that make them work on the network's bands. Correct me if i am wrong though.
Click to expand...
Click to collapse
Untrue my friend, the T-Mobile HD2 only supports the bands used by T-Mobile for 3G. If you sim unlock the T-Mobile HD2 you can use the device with other carriers but you will only get Edge for a data signal as the hardware only supports the T-Mobile 3G bands. There is a model of the HD2 that supports a different 3G band the same ones AT&T uses in the US, it is the Australian model that Telstra a Australian cell carrier released as they use the same bands as AT&T. go to "Official HD2 T9193 (Telstra 850Mhz) Discussion Thread" and you can learn more about it. I also saw your other post in another thread about trying to help your friend out getting 3G on his HD2 using AT&T. Unless he is willing to buy a Telstra HTC HD2 T9193 or have his T-Mobile HTC HD2 T8585 worked on to switch out the hardware for the hardware in the T9193 then he will never getb 3G with AT&T.

Just to answer your question, every rom is an AT&T friendly ROM, meaning, they'll allow you to talk, text and surf the internet.
What you DONT have is AT&T 3G on your tmous HD2. You'll be stuck with EDGE speed.

Thank you all 4 your help,greatly apreciated!! I'm in puerto rico where tmobile is still on Edge. But for some reason tmobile is still alot faster when it comes to receiving & sending MMS than At&t on this phone. Currently using Coredroid 1.5
Sent from my Desire HD using XDA App

its interesting they would use different hardware GSM modules for the slightly different models. I would think the radio firmware version woudl take care of that. Thanks for clarification. I assumed that all GSM modules would be built the same way.

Sadly they are not, this in my opinion is just cellular carriers trying to keep you locked to their networks cause the know most people don"t want to have to buy another device when changing carriers if they already have a good device. So they make it were branded devices can only utilize high speed data with it's intended carriers network. I think this is unfair to consumers, but again just my opinion.

T-Macgnolia said:
Sadly they are not, this in my opinion is just cellular carriers trying to keep you locked to their networks cause the know most people don"t want to have to buy another device when changing carriers if they already have a good device. So they make it were branded devices can only utilize high speed data with it's intended carriers network. I think this is unfair to consumers, but again just my opinion.
Click to expand...
Click to collapse
I think there is technical reason. The various carriers have very different technologies. Even AT&T uses a different 3G network than T-Mobile, despite the fact that both are GSM. Sprint and Verizon use non GSM technologies that are even more different. When a device manufacturer makes a certain model, there is only so much room inside, and unless one wants a really thick and heavy device, a choice has to be made as to which hardware goes into the phone.
I'm not saying that they don't want you to stay on their network - they do, which is why they have those 2 year contracts in exchange for buying a discounted phone. But I don't think that is why the hardware is different.

stevedebi said:
I think there is technical reason. The various carriers have very different technologies. Even AT&T uses a different 3G network than T-Mobile, despite the fact that both are GSM. Sprint and Verizon use non GSM technologies that are even more different. When a device manufacturer makes a certain model, there is only so much room inside, and unless one wants a really thick and heavy device, a choice has to be made as to which hardware goes into the phone.
I'm not saying that they don't want you to stay on their network - they do, which is why they have those 2 year contracts in exchange for buying a discounted phone. But I don't think that is why the hardware is different.
Click to expand...
Click to collapse
Point taken
I would go further with the discussion but I do not want to hijack this thread.

All T-Mobile HD2s the same?

Hi everyone!
i'd ask a question important for me : I will buy a HD2 but u know there are two versions of it. U.S. T-Mobile ones are better in ram and rom. But are all the T-Mobile ones the same in hardware? May i trust to buy if it has "T-Mobile" logo on it?

I'm the owner of a T-Mobile branded HD2 but not the T-Mobile US version.
As far as I know only T-Mobile US version has the T-Mobile logo on top and red and green buttons on bottom.
See my post on this topic: http://forum.xda-developers.com/showpost.php?p=16683539&postcount=9
plain text:
Just to complete the list: there are more versions of the HD2 than two and memory isn't the only difference.
1. T-Mobile US PB81120 (more memory for T-Mobile requirements and for USA specialized radio chipset)
2. European HD2 PB81100 or T8585 (specialized radio chipset for Europe)
3. Asia/Pacific HD2 PB81110 or T9193 (specialized radio chipset for Asia/Pacific)
4. Chinese HD2 T9188 aka Tianxi (with specialized radio chipset for China and design adjustments)
5. Dopod HD2 T8588 (identical to T8585 apart from dopod logo)
EDIT: my advise: to use the full potential of a HD2 in Europe I would like to recommend a European HD2 T8585 because of the used radio chipsets for data transfer.

Thanks for your info. I didn't know about these differences. Then i have another question : Is t-mobile u.s. version much faster than europe hd2 version? It has more ram than europe and so it is faster but can we see that difference while using phone for exlaying games etc..?

I can't say if it's really faster, because I haven't seen a T-Mobile US HD2 live.
Maybe there is a review on youtube...
I'm not unhappy with my HD2's speed.

RAM can be equal on all HD2 models via supporting ROM & radio version. US T-Mo has 1GB of ROM which is a big bonus.
Main concern is radio bands are different also a third Telstra model can be thrown into the varient equasion in this respect.

Speed is important for me so u.s. version seems closer to me although i am in europe. My another question is : What varies when radio bands are different? What kind of problem may occur because of this variety? Does anyone know?

3G/UMTS radio frequencies used in USA are different to frequencies used in Europe.
Therefore the radio chipset is different.
Problem: GPRS data transfer speed (114kbit/s) instead of 3G/UMTS data transfer speed (7,2Mbit/s) if you use a T-Mobile US model in Europe.
Don't let me be missunderstood, this is not a general problem.
It depends on the network operator and which technique is used in various areas if this problem occures.
Who can say which network operator is using which technique in which area? Perhaps there is a problem.

I own the US T-Mo & have yet to have any issue with 3G on any provider I have used in UK Europe & Asia Pacific.
As for performance at gaming they will all be the same but with the larger ROM storage you can install more softwares directly to your device.
If you are a gamer I assume you will be going Android ! so if that is the case you would probably be best getting a dedicated android device that is newer in terms of hardware & doesn't suffer from some of the Android HD2 porting issues ...

uli71 said:
3G/UMTS radio frequencies used in USA are different to frequencies used in Europe.
Therefore the radio chipset is different.
Problem: GPRS data transfer speed (114kbit/s) instead of 3G/UMTS data transfer speed (7,2Mbit/s) if you use a T-Mobile US model in Europe.
Don't let me be missunderstood, this is not a general problem.
It depends on the network operator and which technique is used in various areas if this problem occures.
Who can say which network operator is using which technique in which area? Perhaps there is a problem.
Click to expand...
Click to collapse
Woouww that is a big big bigg problem if true.. I use up to 7.2 mbps and i cant bear slow internet So i'm afraid i will have to buy europe version if that problem is true..
Mister B; What is your internet speed with t-mobile version in Europe? And of course i am going to be going android because I already fed up with winmo 6.5 while using touch HD So u say gaming performance the same in two versions, only rom may be problem. i think rom is not a problem if ram isn't Thanks..