[Q] T-Mobile G2 (HTC Desire Z) in Korea - G2 and Desire Z Q&A, Help & Troubleshooting

I perma-rooted, unlocked, and gFreed my phone... I was wondering why I cannot connect to the network here in Korea...
I am using a sim card I received from SK Telecom when I got my Samsung A... but really, who would use a Samsung A if you have a G2 on hand?
Thank you

The T-Mobile G2 and HTC Desire Z have different radio hardware if I have done my research correctly. The G2 has been customized for the NA (USA) cell networks and frequencies, not sure if this would line up with the Korean networks as the G2 cannot get 3G on any USA network other than T-Mobile.
You'd get better luck with the Desire Z (European or Canadian version) as these radios are true world phones. Correct me if I'm wrong =/

Athrun88 said:
The T-Mobile G2 and HTC Desire Z have different radio hardware if I have done my research correctly. The G2 has been customized for the NA (USA) cell networks and frequencies, not sure if this would line up with the Korean networks as the G2 cannot get 3G on any USA network other than T-Mobile.
You'd get better luck with the Desire Z (European or Canadian version) as these radios are true world phones. Correct me if I'm wrong =/
Click to expand...
Click to collapse
I think you're wrong, but its not clear. The G2 appears to have both Band IV (1700/2100 MHz AWS) that T-Mob uses for data, and Band I (2100 MHz UMTS). The 2100 MHz for Band I is not the same as the 2100 MHz for Band IV. So that is where the confusion lies. Specs listed online (even on T-Mobs website) are not completely clear on this band compatibility (whether the G2 has Band I), and you will find web discussions about this if you search around, that raise more questions than answers.
Band I is what Korea uses for everything (voice and data), so an unlocked G2 should work, if in fact the phone has Band I. In searching around the internet, I haven't found any references to Korea specifically (or Japan, which also uses Band I for voice and data). But I've found some post by people that have used unlocked G2's in Europe, and 3G appears to work fine. So in theory, the hardware should work in Korea.
So either there is something else going on, that is preventing the OP from connecting. Or the G2 in fact lacks Band I.

redpoint73 said:
I think you're wrong, but its not clear. The G2 appears to have both Band IV (1700/2100 MHz AWS) that T-Mob uses for data, and Band I (2100 MHz UMTS). The 2100 MHz for Band I is not the same as the 2100 MHz for Band IV. So that is where the confusion lies. Specs listed online (even on T-Mobs website) are not completely clear on this band compatibility (whether the G2 has Band I), and you will find web discussions about this if you search around, that raise more questions than answers.
Band I is what Korea uses for everything (voice and data), so an unlocked G2 should work, if in fact the phone has Band I. In searching around the internet, I haven't found any references to Korea specifically (or Japan, which also uses Band I for voice and data). But I've found some post by people that have used unlocked G2's in Europe, and 3G appears to work fine. So in theory, the hardware should work in Korea.
So either there is something else going on, that is preventing the OP from connecting. Or the G2 in fact lacks Band I.
Click to expand...
Click to collapse
I'm travelling to Korea tomorrow for a wedding and I'm in the same boat. I think this may have something to do with it
IMEI whitelist policy
Do you have any other info on your resolution to this problem?

You can. They partially opened their network, so if it is just individually being used (not commercial sale or anything), then you can register your G2 to your account only, so you can use your phone in Korea. Visit any cooperate stores ( both SKT, and KT will do).
I am using G2 in Korea as well. So good luck!

Related

American T-Mobile Touch Pro 2 and travel

Will I be ok travelling with this phone to Europe and Canada and getting 3G? Will the bands work? If not, is there something that can be done to make it work? I'm abot to get one and would like to confirm.
Thanks.
tinpanalley said:
Will I be ok travelling with this phone to Europe and Canada and getting 3G? Will the bands work? If not, is there something that can be done to make it work? I'm abot to get one and would like to confirm.
Thanks.
Click to expand...
Click to collapse
the t-mobile rhodium supports UMTS 1700 and UMTS 2100 so if canada and/europe use those bands for UMTS (3G) then yes it will work. If not, the device is quad band GSM so no problem using voice and EDGE for data.
Also make sure the device is unlocked if you plan to put another carrier's SIMcard in the device.
tinpanalley said:
Will I be ok travelling with this phone to Europe and Canada and getting 3G? Will the bands work? If not, is there something that can be done to make it work? I'm abot to get one and would like to confirm.
Thanks.
Click to expand...
Click to collapse
Not sure about Canada...but TmoUSA 3G bands are different than Euro-3G.
Unrelated, but worth mentioning: the T-Mobile USA international roaming charge for data is steep -- $15/megabyte.
If you got a Euro sim card that would fix the $, but not the radio (for 3G).
The T-Mobile version supports AWS and 2100 3G so works fine in Europe and most other locations. Had 3G T-Mobile and 3G Orange in the UK, but I would suggest a local SIM too. For the UK, both T-Mobile UK prepaid and Virgin UK prepaid work in a locked T-Mobile TP2 or get it unlocked for more choices.
jamssx said:
The T-Mobile version supports AWS and 2100 3G so works fine in Europe and most other locations. Had 3G T-Mobile and 3G Orange in the UK, but I would suggest a local SIM too. For the UK, both T-Mobile UK prepaid and Virgin UK prepaid work in a locked T-Mobile TP2 or get it unlocked for more choices.
Click to expand...
Click to collapse
You used a T-Mobile USA version of the TP2 in Europe and had a usable 3G data connection?? Hmmm...that's the first I've read of this.
If this is well-known (and if so, maybe I'm just clueless ) can you provide a link to more discussion, that is...uhh...evidence...of it? Not about what bands the USA version supports -- I know that part -- but other reports/disucssion of it actually working.
On the other hand, are there any reports of a Euro-TP2 that can work on 3G bands in the USA?
USA TMO TP2 will work on TMO 3G in USA. It may also work on WIND Mobile for 3G data here in Canada, not sure about voice as they are using some strange network setup.
As the phone is UMTS 2100 capable, it will get 3G data and voice in most places in Europe and Asia.
quid246 said:
USA TMO TP2 will work on TMO 3G in USA. It may also work on WIND Mobile for 3G data here in Canada, not sure about voice as they are using some strange network setup.
As the phone is UMTS 2100 capable, it will get 3G data and voice in most places in Europe and Asia.
Click to expand...
Click to collapse
Have you tried a TmoUSA TP2 in Europe or Asia -- yourself -- and accessed 3G data?
I'm still doubtful, but I actually hope I'm wrong 'cause I'd love to be able to get 3G data on my TmoUSA TP2 while traveling in Europe...as long as I get a Euro sim card. Otherwise, faster data just means more roaming-$$.
MCbrian said:
Have you tried a TmoUSA TP2 in Europe or Asia -- yourself -- and accessed 3G data?
I'm still doubtful, but I actually hope I'm wrong 'cause I'd love to be able to get 3G data on my TmoUSA TP2 while traveling in Europe...as long as I get a Euro sim card. Otherwise, faster data just means more roaming-$$.
Click to expand...
Click to collapse
Check the specifications. It supports both 1700 and 2100 UMTS. That means it will work in Europe. ALL Touch Pro 2's have 2100MHz UMTS and quadband GSM, every single one of them, including the CDMA ones. The carrier specific ones add certain bands.
European Touch Pro 2s have UMTS 900
CDMA Touch Pro 2s have CDMA bands
T-Mobile USA has 1700MHz AWS band
AT&T has 850/1900MHz UMTS
TP2 overseas vs versions
I believe, as I've use phones often in the US and overseas, that T-mobile uses 1700 UMTS in the US, but that their TP2 is also 2100 UMTS. Just as At&t Tilt uses 850 & 1900 UMTS (At&t requires both frequencies), but also has 2100 UMTS. As such, both should work in most European, African and Asian countries (verizon and sprint you,re mostly screwed).
I believe the older Tytn II (tilt) was sold world wide as a 850/1900/2100 phone, so you could basically buy it anywhere and use it here on At&t only for 3g or T-mobile Edge only. Unfortunately, the TP2 is sold mostly as a 900/2100 UMTS worldwide outside the US, so you are stuck buying the US versions that correspond to the US networks. The bonus of the At&t tilit 2 version is that it is 850/1900/2100, so it will work almost anywhere. The drawback of the T-mobile TP2 is that 1700 is used by almost no one and while you can use it in most of the aforementioned places, you can't use it in the Americas outside the US & Canada.
Check out this handy wiki UMTS page: en.wikipedia.org/wiki/List_of_Deployed_UMTS_networks
Just a note, I almost always pick up a pay as you go sim in other countries- much cheaper and very little hassle. Worth it for anything over a week stay. Maybe not as much so in some of Western Europe.
drjby4 said:
I believe, as I've use phones often in the US and overseas, that T-mobile uses 1700 UMTS in the US, but that their TP2 is also 2100 UMTS. Just as At&t Tilt uses 850 & 1900 UMTS (At&t requires both frequencies), but also has 2100 UMTS. As such, both should work in most European, African and Asian countries (verizon and sprint you,re mostly screwed).
I believe the older Tytn II (tilt) was sold world wide as a 850/1900/2100 phone, so you could basically buy it anywhere and use it here on At&t only for 3g or T-mobile Edge only. Unfortunately, the TP2 is sold mostly as a 900/2100 UMTS worldwide outside the US, so you are stuck buying the US versions that correspond to the US networks. The bonus of the At&t tilit 2 version is that it is 850/1900/2100, so it will work almost anywhere. The drawback of the T-mobile TP2 is that 1700 is used by almost no one and while you can use it in most of the aforementioned places, you can't use it in the Americas outside the US & Canada.
Check out this handy wiki UMTS page: en.wikipedia.org/wiki/List_of_Deployed_UMTS_networks
Just a note, I almost always pick up a pay as you go sim in other countries- much cheaper and very little hassle. Worth it for anything over a week stay. Maybe not as much so in some of Western Europe.
Click to expand...
Click to collapse
That is correct. Apparently they are only able to have 3 3G frequencies (though NTT DoCoMo is currently working on a chip that can handle 8 frequencies!)
At first Europe only used 2100MHz 3G and AT&T had set up on 850MHz/1900MHz. Since those were the only 3 bands, HTC would put all three of those bands in its phones up to the Tilt (Kaiser). Once they made the Raphael though, there was 900MHz 3G in Europe and T-Mobile had chosen the AWS band.
Since they can apparently only put 3 bands in, and Europe now needed two for 900MHz/2100MHz, they could no longer put but of AT&T's frequencies in. So they must have just dropped them.
The AT&T version (FUZE) has 850MHz/1900MHz and also has 2100MHz, which is the dominant band for 3G in Europe. I am not sure if they are using 900MHz there yet, but they decided that was more important to put in the European ones than AT&T's bands.
T-Mobile's 3G phones get AWS and 2100MHz. I think AWS might use 2 of the bands because it is split on 1700MHz and 2100MHz (but a different 2100MHz apparently, maybe low 2100MHz vs high, I'm not sure)
petard said:
Check the specifications. It supports both 1700 and 2100 UMTS. That means it will work in Europe. ALL Touch Pro 2's have 2100MHz UMTS and quadband GSM, every single one of them, including the CDMA ones. The carrier specific ones add certain bands.
European Touch Pro 2s have UMTS 900
CDMA Touch Pro 2s have CDMA bands
T-Mobile USA has 1700MHz AWS band
AT&T has 850/1900MHz UMTS
Click to expand...
Click to collapse
It doesn't just support 1700 and 2100, it uses both to work: 1700 for up/send and 2100 for down/receive. So, how does the Tmo USA radio cope without 1700 band for up/send when it's expecting it?
petard said:
T-Mobile's 3G phones get AWS and 2100MHz. I think AWS might use 2 of the bands because it is split on 1700MHz and 2100MHz (but a different 2100MHz apparently, maybe low 2100MHz vs high, I'm not sure)
Click to expand...
Click to collapse
So, the full story (?) is that T-Mobile uses 1700+2100 (up/down) in the USA (which is what I already understood/knew) and in addition to that pair there's a separate slightly-different 2100 band that's used outside the USA? -- That, I didn't know.
If that's the explanation, that makes sense. But confusing that there's 2 different 2100 bands...
I may have to use some frequent-flyer miles and go check it out...
MCbrian said:
So, the full story (?) is that T-Mobile uses 1700+2100 (up/down) in the USA (which is what I already understood/knew) and in addition to that pair there's a separate slightly-different 2100 band that's used outside the USA? -- That, I didn't know.
If that's the explanation, that makes sense. But confusing that there's 2 different 2100 bands...
I may have to use some frequent-flyer miles and go check it out...
Click to expand...
Click to collapse
According to Wikipedia, UMTS Band I (commonly known as 2100MHz) uses 1920 - 1980 for uplink and 2110 - 2170 for downlink while UMTS Band IV (AWS, 1700MHz) uses 1710 - 1755 for uplink and 2110 - 2155 for downlink.
Band II (1900MHz) uses 1850 - 1910 for uplink and 1930 - 1990 for downlink and band V (850MHz) uses 824 - 849 for uplink and 869 - 894 for downlink. The uplink and download for these are close, unlike bands I and IV.
http://en.wikipedia.org/wiki/UMTS_frequency_bands
I just assume they are only able to have 3 different frequencies since I have yet to see a UMTS phone with 4 frequencies. But as I wrote this, I'm not too sure because there were phones with Band I, Band II, and Band IV which would mean that there are chips capable for 4 different frequencies? Who knows, maybe someone with actual technical knowledge about this can say.
Also according to that page, there are five different UMTS bands deployed across the world. A bit of a pain. That is more then GSM ever had and who knows if it will grow to even more. LTE also will be coming in before GSM is phased out, so we are going to have to have phones that have GSM, UMTS, AND LTE. GSM will be no problem, quadband has been standard for a while, but having a phone that has both your carriers UMTS and LTE frequencies is going to be tough unless you buy it from your carrier.
What they should have done is just used the band names, and not their frequencies. It would be much easier to know that Europe runs on band I and T-Mobile USA runs on band IV and the T-Mobile Rhodium supports both Band I and Band IV.

[Q] Is it possible to Flash G2's 3G Radio, an set it to work on 900/2100 mhz??

Well, it's just as the title of this thread says... I have a Tmobile's G2 (A.K.A. HTC Vision), which its 3g default bands are under 1700 / 2100. Here on my country, all the providers have their 3g services on 900 / 2100.... soo... Is it possible to Flash T-mobile G2's Radio, an set it to work on 3g 900/2100 mhz, so I can use the phone on 3G, instead of that annoying and extremely slow EDGE??
Or, is there a Custom ROM that has these settings on it? (I mean, a rom that automatically turns the 3g band to 900 instead of 1700)
Thanx.
No you can't, the radio bands are set in hardware (e.g. the physical antennae in the phone), not just in the radio software.
Why would you need to, the phone would use the 2100 band for it's 3G in your country? I took mine to Russia and it worked fine.
I don't think it's that simple. I only get edge on my T-mobile G2 using the Rogers network.
Sent from my HTC Vision using XDA app.
Rogers doesnt use 1700 or 2100 so that is to be expected. The original posters country has a 2100 3G, I would suspect he just isn't in a coverage area.
Circledog said:
Why would you need to, the phone would use the 2100 band for it's 3G in your country? I took mine to Russia and it worked fine.
Click to expand...
Click to collapse
I don't think it works like that, I think it needs both bands to work. If it was that simple then surely they wouldn't bother making different phones for different markets (e.g. T-Mobile US vs Europe/Asia)
That may be...I'm only speaking of my experience in Russia, they have 2100 only 3G and mine worked without the second band.
Just to add, T-Mobile US use the 1700 MHz band for the uplink, and 2100 MHz for the downlink. So presumably the phones (i.e. G2, as opposed to the Desire Z) are physically setup like that too.
Oh I thought Rogers uses 2100. Either way, no worky.... sad.
Sent from my HTC Vision using XDA app.
Ah, I think I'm following you, because Russia exclusively uses 2100 for up and down my phone worked, but since his county has a seperate uplink and a downlink band it won't?
Circledog said:
Ah, I think I'm following you, because Russia exclusively uses 2100 for up and down my phone worked, but since his county has a seperate uplink and a downlink band it won't?
Click to expand...
Click to collapse
Yeah I think that's it. I don't know *that* much about this myself, just picked up on a few discussions about the G2/DZ on here over time.
Have a look at this - http://en.wikipedia.org/wiki/UMTS_frequency_bands
I think the "problem" is that the G2 uses exclusively "Band IV" for 3G (i.e. 1700/2100 split), but somewhere like the OP's Dominican Republic uses Band VIII (900).
What the OP needs is a Desire Z, which operates on Band I (2100) and Band VIII (900).
Russia appears to use Band I (2100) as well. Maybe a G2 can partially work there then ?
Rogers uses something else, Band II (1900) and Band V (850).
As I say, I'm don't know that much about this myself, so if anyone else can help clarify/confirm/deny, then that'd be great.
Much appreciated.
Sent from my HTC Vision using XDA app.
Via Google, I dug up another interesting piece of info.
Although it's not on HTC's official spec list on their site, on T-Mobile's support pages it says that the G2 does Band I as well. Which would explain how it would have worked in Russia. That's not going to help the OP's problem though.
http://support.t-mobile.com/doc/tm24233.xml?&A2L.SERVICE=FeatureSummary
Wow mega confusing, but you helped clear it up, thanks!!
Mine worked very well in Moscow, I was pleasantly suprised, it was kind of a bonus to be able to get on the web, I wasn't expecting much.
I don't understand why the manufactures don't provide phones with penta-band 3G support like the Nokia N8. Maximize profit when producing 2-3 same phones with different frequencies maybe? I mean quad-band GSM has been supported for pretty much all of the current phones, why not 3G bands as well?
Has anyone tried this option?
bring up the dial pad and dial
*#*#info#*#* (aka *#*#4636#*#*)
press "Phone Info"
you'll get the screen with the imei, phone no, network and a button that says "Run Ping Test" at the top
press your "menu" button
when the menu pops up, it'll have 6 options, select radio band, view sim address book, view fixed dialling numbers, view service dialling numbers, get PDP list, and More.
Choose the first one "Select Radio Band" then select the appropriate band.
Not sure if it helps in this situation, but I found it in a thread about gaining 3G in Europe on the N1
hey bro.. I read from one topic in TMo's official G2 forum that the G2 will work on a country with only a UMTS band of 2100 both for up and down (the answer is from TMo employee, an engineer)... hope you'll be enlightened. I bought an unlocked G2 and I researched extensively before purchase. Im from the Philippines which only supports the 2100 band for 3G. I Know and Im 100% positive that the phone will support the 3G band here in my country. cant wait for my G2 (arriving tomorrow)
btw... coverage is vital. if the 3G signal is weak or non-existent in your area, you'll be switched to edge for data on your phone (naturally).. good luck
sorry.. cant post the link. would've loved to have posted it.
juanito05 said:
hey bro.. I read from one topic in TMo's official G2 forum that the G2 will work on a country with only a UMTS band of 2100 both for up and down (the answer is from TMo employee, an engineer)... hope you'll be enlightened. I bought an unlocked G2 and I researched extensively before purchase. Im from the Philippines which only supports the 2100 band for 3G. I Know and Im 100% positive that the phone will support the 3G band here in my country. cant wait for my G2 (arriving tomorrow)
Click to expand...
Click to collapse
That's the Band I thing that I was talking about, that T-Mo shows on their spec sheets (but HTC doesn't seem to list, for some reason).
I think the G2 will do 3G if any one of the two bands are supported by the country. Correct me if Im wrong
juanito05 said:
hey bro.. I read from one topic in TMo's official G2 forum that the G2 will work on a country with only a UMTS band of 2100 both for up and down (the answer is from TMo employee, an engineer)... hope you'll be enlightened. I bought an unlocked G2 and I researched extensively before purchase. Im from the Philippines which only supports the 2100 band for 3G. I Know and Im 100% positive that the phone will support the 3G band here in my country. cant wait for my G2 (arriving tomorrow)
btw... coverage is vital. if the 3G signal is weak or non-existent in your area, you'll be switched to edge for data on your phone (naturally).. good luck
sorry.. cant post the link. would've loved to have posted it.
Click to expand...
Click to collapse
There is nowhere in the world that uses 2100 in both directions. Band 1 is 1900 UP, 2100 DOWN.
In all cases, your phone must be able to upload on the frequencies that the towers listen on, and download on the frequencies that the towers transmit on.
I.e., north america vision transmits on 1700 or 1900, receives on 2100.

[Q] T-Mobile & Desire Revolution HD/12.54.60.25_26.09.04.11_M2 Radio

Hi everyone,
Was wondering if anyone was having problems with the following setup:
- Desire HD running Android Revolution HD 5.1.7 (will update later)
- T-Mobile
- 12.54.60.25_26.09.04.11_M2 Radio
Since flashing this radio/upgrading to this version of the Revolution HD rom about 10 days ago I've noticed a huge performance boost from the battery. However I think the radio is causing problems as I'm unable to send/receive MMS messages or have any 3G/HSDPA signal..
I've been over in Canada and noticed I was unable to get 3G speeds and was always stuck on Edge. I put this down to being in another country and Fido said I had the European version of the phone which wasn't compatible with their data network. I was a bit surprised because I figured the phone was compatible with all frequencies (as covered on the Tech Specs page of htc.com)but I'm not sure whether that lists the frequencies for say the "European" version of the phone *and* the "North American" version of the phone..
HSPA Frequencies in Europe (PCS): 900 / 2100
HSPA Frequencies in North America (PCS): 850 / 1900
The Telus DHD and Inspire 4G are the exact same device internally, the only difference is the "AT&T" in chrome on the metal housing rather than "HTC" on it for the Inspire 4G.
Every other DHD will not support north american bands, thats why you're limited to EDGE, since its the highest GSM gets (which supports the north american frequencies since that radio controller is quadband)
Not only that, but apn settings need to be entered for any data to work correctly (even if the frequencies are supported)
The general HTC Webpage shows the European/Asian frequency support of the phone, unless you choose a north american portal (US/Can)
JSLEnterprises said:
HSPA Frequencies in Europe (PCS): 900 / 2100
HSPA Frequencies in North America (PCS): 850 / 1900
The Telus DHD and Inspire 4G are the exact same device internally, the only difference is the "AT&T" in chrome on the metal housing rather than "HTC" on it for the Inspire 4G.
Every other DHD will not support north american bands, thats why you're limited to EDGE, since its the highest GSM gets (which supports the north american frequencies since that radio controller is quadband)
Not only that, but apn settings need to be entered for any data to work correctly (even if the frequencies are supported)
The general HTC Webpage shows the European/Asian frequency support of the phone, unless you choose a north american portal (US/Can)
Click to expand...
Click to collapse
Thanks for the response.
..Just realised I forgot to finish the post! (I'm blaming Jetlag).
..Anyway I got back to the UK on Thursday and have been unable to get 3G/MMS since I returned. I've walked all around the city today and at no point have I got anything other than Edge or GPRS coverage.
I've checked all the APN settings etc and all is fine.

[Q] Desire Z: Can I switch to N. American 3G Bands?

OK...the Desire Z only supports 900 and 2100 MHz which is European and Asian 3G bands. Is there any way that it can be made to operate on any North American 3G bands (like 850, 1700/2100, or 1900) or the issue is entirely hardware related, in which case nothing can be done. I should note that the phone has already been upgraded to 2.3.3 so the rooting options are rather limited.
Any contribution will be highly appreciated!!!
Its hardware limited to the bands you have. My understanding (correct me if I'm wrong) is that with that device (if it is unlocked) you will be able to use a T-mobile SIM to get 3G in the US. I'm not 100% sure with this though, as I don't think the DZ has 1700mhz which is needed for T-mobile.
You don't have the correct bands for AT&T 3G. There is a Canadian version of the DZ that will work on AT&T in the US on 850/1900, however.
The device is completely unlocked and unbranded but its specifications clearly state that its 3G frequencies are 900 and 2100.T-Mobile's 3G is 1700/2100 (together) and it's different from the European 2100. Unless the North American bands can be activated via a secret menu, or by flashing a different radio (impossible with 2.3.4), the phone, as is, can't connect to American 3G networks...only GSM 850 and 1900.
So, a miraculous secret menu appears to be my only hope, which, of course, is impossible to implement if the hardware doesn't support it!
Thanks for your concern!
Well, with you phone, you can use only half of tmo's 3g service since they reserve one band for uploads and the other band for downloads. So technically you kinda get 3g, but just 1 way.
Sent from my Desire Z via XDA App
I'm afraid that i can't do that either because the TMO's 2100 3G frequency spectrum is not the same as the European one!
I think I'll exchange it with a friend's European Nexus S which is tri-band 3G and, besides 900 and 2100, it supports TMO's 1700/2100 band! It is an excellent phone but I slightly prefer the metal and the weight of the Desire Z despite the fact that I do not particularly care about the physical keyboard!
Thanks anyway guys!
haki.gr said:
I'm afraid that i can't do that either because the TMO's 2100 3G frequency spectrum is not the same as the European one!
I think I'll exchange it with a friend's European Nexus S which is tri-band 3G and, besides 900 and 2100, it supports TMO's 1700/2100 band! It is an excellent phone but I slightly prefer the metal and the weight of the Desire Z despite the fact that I do not particularly care about the physical keyboard!
Thanks anyway guys!
Click to expand...
Click to collapse
yea. i think mputtr brought up the correct point. The way T-mo uses 3G is 1700 and 2100 separately for down/up, so like you said its different than the Euro 2100 spectrum.
Sorry it didn't work out.

[Q] Does unlocked G2 work in Europe with full 3G? Final question

I read many topics (too many I guess) and eventually I don't know who is right.
A short example:
http://forum.xda-developers.com/showpost.php?p=5111402&postcount=2 <- no, it won't work
http://forum.xda-developers.com/showpost.php?p=5125254&postcount=10 <-- yes, it will work
So, who is right? Will T-Mobile G2 work with EDGE/3G/HSDPA?
I'm talking about unlocked G2 used in Poland with Polish SIM Card.
linoskoczek said:
I read many topics (too many I guess) and eventually I don't know who is right.
A short example:
http://forum.xda-developers.com/showpost.php?p=5111402&postcount=2 <- no, it won't work
http://forum.xda-developers.com/showpost.php?p=5125254&postcount=10 <-- yes, it will work
So, who is right? Will T-Mobile G2 work with EDGE/3G/HSDPA?
I'm talking about unlocked G2 used in Poland with Polish SIM Card.
Click to expand...
Click to collapse
Ok, I delved into some research here, since I live in the US I might not be 100% accurate, but here's what I found. In Poland, it looks like the main used frequencies for gsm are 900 and 1800, with 2100 for 3G, and on T-Mobile's official tech spec list for the G2 it has all of those frequencies listed, plus several US ones that don't really matter much. I don't quite know anything about HSDPA though. Just looking at information, I'd say that it looks like you should be able to have 3G on it. I could be wrong though, I never say I'm 100% right on things I'm shaky about Hope it helps
So I researched how about HSDPA. It works at previous (3G) frequency, so 2100MHz in Europe and and in USA 850MHz & 1900MHz. HSDPA is called 3G+ probably because it works on same frequency.
G2 differs from Desire Z in 900MHz UMTS frequency, which cannot be used on G2, when Desire Z has no problems. As I read more, UMTS works both on 900MHz and 2100MHz. In Europe, there are both 2100MHz and 900MHz. 900MHz frequency was made generally to have a stronger signal in buildings, when 2100MHz may have problem with it (need to be tested).
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