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How To Change From Gsm 900 To Gsm 850?????

inmy Country Only Works Gsm 850, Does Anybody How To Change The Band The Htc Diamond, Cause This Phone Is A Tri Band And Works With 900 Gsm.
Can Anybody Helpme Please????

You can change the band in Comm Manager. There is a tab called Band.

And only assuming you bought the appropriate device, since if you bought the European device, then you do not have the 850 support.

amir77a said:
And only assuming you bought the appropriate device, since if you bought the European device, then you do not have the 850 support.
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Which country's running 850 mhz ... I thought that band was reserved for GSM-R (GSM Rail private network) - Or at least it is in the UK !.

I believe some countries in south america uses the 850band, and the US. It is wise to read the specs when you buy a phone. the current diamonds (european, asian) do not support 850. It would have been a quad-band band phone, not a tri-band if that was the case. There will probably be a US-version, but afaik it's not available as of now. sorry.

Im from South America, I thuoght that in my country works the 900 mhz, but only works with the 850mhz. I dont know what to do, i suppose i have to sell it on ebay cause nobody has a solution. thansk anyway

Why dont you return it to where you bought it from??...i dont know the laws of your country but if you have only had it a few days then you should be entitled to a refund as the phone is not suitable for you.

ajs007 said:
Which country's running 850 mhz ... I thought that band was reserved for GSM-R (GSM Rail private network) - Or at least it is in the UK !.
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Click to collapse
United States of America.

ajs007 said:
Which country's running 850 mhz ... I thought that band was reserved for GSM-R (GSM Rail private network) - Or at least it is in the UK !.
Click to expand...
Click to collapse
Canada and US

Somebody told me that there is a Software so you can change the GSM, and something abour the hardware, other guy told me about the Radio but i dont think so!!! i need some professional help please!!!

Try to flash the radio 1.00.25.05 or 1.00.25.06. I tested this two radio with VIVO Brazil that transmit on 850MHz and is working well.
http://forum.xda-developers.com/showthread.php?t=407956

Thanks my friend, im going to try it!!! I'll let you know what happens!!!

It didt work my friend, cause my phone is a Tri-Band phone, yours maybe is a Quad-Band phone. that radio is only fot Quad-Band phones.
Thanks anyway.
I need some help!!!!

jmcorral said:
It didt work my friend, cause my phone is a Tri-Band phone, yours maybe is a Quad-Band phone. that radio is only fot Quad-Band phones.
Thanks anyway.
I need some help!!!!
Click to expand...
Click to collapse
You have a touch diamond, right? I have it too and also if on HTC site is wrote that diamond is tri band, with radio 1.00.25.05 and radio 1.00.25.06 is actually working as quad band GSM.
Check this post, the guy tested the quad band rom with a professional communication tester:
http://forum.xda-developers.com/showpost.php?p=2413582&postcount=122
You have flashed the .05 radio? What carrier are you using?

im from colombia
i'm from colombia and i install the radio rom 25.05 and now is working in 850
before i installed the signal sucks with the 25.03... but now is better than never before.
i think that your need to reflash the 25.05 radio rom

Im going to try again my friend!!!!! My carrier is Movistar.
I would let you know what happens!!!!
thank you very much, i appreciatte your concern about my problem, thanks my friend!!!

it works!!!!!!!!!!!!!!!!!!!!!!! thanks my friend i really appreciatte!!!!!!!!!!!!!!!! you rule!!!!

Hello everyone.. I'm also from Colombia and I want to give you all information about what i did in order to solve the issue of the 850mHz.
I flashed HardSPL and ROM for Radio as indicated in:
http://forum.xda-developers.com/showthread.php?t=416211 (As many people I'm using HardSPL 1.40.OliNex
and Radio 1.00.25.05 )
I also flashed a cooked ROM from:
http://forum.xda-developers.com/showpost.php?p=2405336&postcount=1
I did all that yesterday so I havent been able to test signal outside from Bogota, but improvement on the device and the signal reception is obvious. I also did the test of dialing *#*#364#*#* on the key pad of the phone and I saw that the phone was working on the 850mHz frequency.
I have tested the device with two different carriers... Movistar and Comcel withouyt any problem. I was hoping with Comcel to get 3G signal (due to activation of 850mHz frequency) but still does not work. Some say that is imposible due to hardware issues, some other people says that Hardware in Diamond is capable of 3G US standard.... LETS SEE!!! HOPEFULLY SOME OF THE GURUS ARE WORKING ON THIS ISSUE.

It works in Mexico
Hello there.
Hell i bought mine directly from HTC, it was shipped with a spanish ROM 1.93 and radio .05. As soon as I inserted my GSM chip it worked with no problem. We are still waiting that some Dev found the key to allow our first gen diamond to work with 3G. Because imported phone onl ywork with 3.5G at 900mhz

vodafone Australia, which diamond ?

Hi All
hoping you can give some advice here, I'm currently with vodafone Australia and looking at buying a diamond.
Currently they are available locally as the Telstra HTC touch diamond (competing network) or via grey import models.
I understand through numerous threads that there is no quad band model as yet and that telstra uses 3g on the 850mhz band, i think but am not sure that vodafone uses 2100mhz for 3g.
I'm confused as to which handset im better off with the telstra one or a grey import.
To make it more confusing I'm going to USA and Sth America, shortly and want to make sure it roams on 3g.
HELP!!!!

no-one even has an opinion?!?
After scouring the rest of the 'net it appears that;
telstra uses 850mhz hsdpa,
vodafone and optus uses 2100mhz umts,
optus will launch 900mhz hsdpa in the near future.
I gather from this that no matter which australian carrier network i use i will not be able to use one carrier or another does someone have any further insight on this?

I think I read on Whirlpool that the Telstra handsets should work on any network - except Optus' 900mhz.
Im with Telstra (work sim), so just went with the Telstra handset.
I've got a Virgin sim I could try in it if you'd like?

that would help . . . cheers
It cant do any harm... I guess my real issue is that I want to make sure I'm getting the highest possible data speeds in whatever country I'm in and I'm not sure what difference there is between the carrier frequency's being used. I get the general impression that only telstra has 7.2mps (theoretical) speed at present, but if i go with a handset that doesnt support 900mhz and i end up with 2100mhz am i missing out on vodafone hsdpa......
im consfused

I was in the same boat when trying to figure out which Diamond to get. I jumped ship and ordered a DIAM130 (Telstra ver.).
Its my understanding that the Optus 900MHz UMTS will be for use in regional areas, whereas 2100MHz for metropolitan. A quick search of the net also indicated that 2100MHz is the dominant UMTS band throughout most of the world, with the exception of the U.S. which uses 850/1900 I believe. So I figure the DIAM130 would be the best bet if you want some sort of 3G connection whatever country you may be in.
If I'm mistaken, can someone please correct me...
EDIT: Looking back at your posts, I'm not sure if you realise this, but the DIAM100 is 900/2100 MHz UMTS and the DIAM130 is 850/2100 MHz UMTS.

Yep, I think the Helstra one with 850mhz/2100mhz looks like the best bet. It would seem that all the carriers in Oz use the 2100mhz in the cities and 850mhz or 900mhz in rural areas.
The US and Sth.America seem to use 850mhz and Europe uses 900mhz/2100mhz.
The whole reason this came up was about 2 weeks ago I went into a Helstra shop and HTC had a marquis with their own staff, they actually stated do not buy a Helstra handset wait until October 1 when the other networks will have quadband handsets. I put this down to them not knowing what they were talking about.
I cant wait any longer though and I think I'm off to JB HiFi to pickup a telstra one, whirlpool forum users have been picking them up for between $750 and $800.

I bought my Diamond from JB (telstra phone bought outright) and I use it with voda prepaid.
I can access the GSM network fine and their 3G network as well. But I force my phone to use GSM only, apparently 3G drinks more battery power.

I am on the vodaphone network ( work). I bought a diamond from a H/K supplier & have never had anytrouble using the 3g network in any of the main capital cities.
Unless you intend to use 3g A LOT in the country areas of australia, then a presumably cheaper grey import DIA 100 will do the trick.
only would suggest that you upgrade to one of the great ROMS available on this site from the generous chefs!
sorry but i think telstra are ripping off the aussie customers with the 130 model.

I have a DIAM100, it works on all networks in Australia including Telstra NextG (yes it DOES work on 850MHz HSDPA). I currently use the phone on the 3 network which use 2100MHz and get very good speeds (in excess of 3.5mbps).

Hi poedgirl,
noticed your'e using an older radio version than whats currently available.
at the risk of telling you to suck eggs, i would suggest you try the 1.00.25.08 Radio rom as the increase in signal phone strength & GPS strength was unbelievable!
thats assuming you are located in Sydney

This Post in the ROMs section pretty much covers which models you can use or will need on the various AU networks.
There are 3 3G Network Frequencies in AUS
850 MHz (NextG) - DIAM130
900 MHz Optus - DIAM100, DIAM110, DIAM200, DIAM300
2100 MHz Optus, Vodafone, Three, Telstra(use Three's) - DIAM100, DIAM110, DIAM200, DIAM300, DIAM130
ALL Diamonds have the 2100MHz frequency!
Click to expand...
Click to collapse
I have a grey import DIAM100 running on Three and it has not missed a beat.

poedgirl said:
I have a DIAM100, it works on all networks in Australia including Telstra NextG (yes it DOES work on 850MHz HSDPA)..
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Click to collapse
just out of interest how were you able to determine this?

poedgirl said:
I have a DIAM100, it works on all networks in Australia including Telstra NextG (yes it DOES work on 850MHz HSDPA). I currently use the phone on the 3 network which use 2100MHz and get very good speeds (in excess of 3.5mbps).
Click to expand...
Click to collapse
sorry to disappoint, I used to think the same, but see this and this You are right - it uses HSDPA, but only on the 2100 network, outside of that network the phone will show "E" for "edge" .(which is GPRS).

Thanks timn2087, that what I thought. I suspect the Telstra branding and web interface can lead you to believe you are on the Telstra NextG network, regardless of whether you are connecting with a phone capable of 850MHz or 2100MHz. My DIAM100 (Same hardware) on 3 behaves exactly as you describe when it roams onto Telstra GSM displaying "E" for "edge".

i bought the helstra one
well i just went for it, and bought the diam130. ive gone the hardspl, radio 05, swift rom. all seems to working.
got if for $760 outright at jb hifi pitt st mall sydney store. no stress haggle said to the guy whats the best price he said $800 i said how about $760 he goes "done".
thanks for all your help everyone

logger said:
Thanks timn2087, that what I thought. I suspect the Telstra branding and web interface can lead you to believe you are on the Telstra NextG network, regardless of whether you are connecting with a phone capable of 850MHz or 2100MHz. My DIAM100 (Same hardware) on 3 behaves exactly as you describe when it roams onto Telstra GSM displaying "E" for "edge".
Click to expand...
Click to collapse
correct. The DIAM130 on Next G will show a 3G icon whenever it is on 850 Mhz, occasionally this icon changes to "H" HSDPA when a data connection is active.

timn2087 said:
sorry to disappoint, I used to think the same, but see this and this You are right - it uses HSDPA, but only on the 2100 network, outside of that network the phone will show "E" for "edge" .(which is GPRS).
Click to expand...
Click to collapse
Well, for one, the phone gets a HSDPA signal in Mandurah - where there is no 3 coverage (only ever get Telstra roaming there if you're with 3). Also, as others have said, if you are on 3's network, the network shows up as "3Telstra", which it does not on mine.

850/2100 3G Diamond on Rogers CA?

I haven't found any answers so I've decided to "ask the audience".
To my understanding the Rogers Canada network uses 850/1900 for it's 3G primarily 850. Is this true?
I haven't found a mention of a North American release date for the GSM Diamond. Anyone know the date? I don't expect it till around Christmas.
I'm looking at an Australian Diamond that uses the 850/2100 bands for 3G. Will the support of the 850 band be enough to function on the Rogers network or does the phone have to support both bands for 3G to function on the network?

only gsm 850 works on my diamond. i think its 1900 for 3g

I have an European Diamond which works on the rogers network but I get GSM/EDGE but to my horror no 3G
Looking around only on a few sites can I find any mention of what works and what doesn't the closest information I could find is from this link:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/843038.html
NextG phones are 850/2100 capable, so you'll be right on most 3G networks...
Click to expand...
Click to collapse
WILL get UMTS 850 signal in Cingular 3G coverage areas in the states...
Click to expand...
Click to collapse
But someone also says
850MHz UMTS coverage on Rogers in Canada, but you still can't get next g
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Click to collapse
and they go back and forth so I'm not sure what to believe and I don't think I want to buy another Diamond just to find it won't work either.
http://www.geekzone.co.nz/Jama/585 has some interesting comments as well but I'm not sure what to believe.
Can anyone confirm or deny and of this?
The question is will a Australian phone with the 850/2100 3G radio function on the Roger network?

nosgop said:
The question is will a Australian phone with the 850/2100 3G radio function on the Roger network?
Click to expand...
Click to collapse
I have the Australian version (850/2100 MHz) and it supports the Telstra 3G Network. Can't see why it wouldn't work on other 850/2100 MHz 3G network.

To my understanding the Canadian Rogers network is a 850/1900 network.
Does the phone need to support both bands or will one suffice?

Rogers Diamond
I had an EU/Asia Diam and I never manage to get 3G connection. Sold the phone and bought a Rogers branded diam and by default I see 3G connection all the time on the top network status. But now I'm thinking of going back to an EU/Asia version unless I can flash my Rogers branded diam with a better ROM.

Unbranded X1 3G working in Canada / USA?

My friend has a unbranded X1, but don't know if can be compatible for the 3G network in Canada or USA? Anyone knows? Or North American ROM needs to be flashed on to enable 3G compatibility with the Carriers in North American??
Thanks in advance for any inputs

White_Hair said:
My friend has a unbranded X1, but don't know if can be compatible for the 3G network in Canada or USA? Anyone knows? Or North American ROM needs to be flashed on to enable 3G compatibility with the Carriers in North American??
Thanks in advance for any inputs
Click to expand...
Click to collapse
This is a very vexed issue. Please read the thread on 850Mhz 3G connection.
The short answer is:
1) "unbranded X1" is irrelevant. Use Start>Settings>System>Device ID to find the actual device version, ie. X1i or X1a
2) if your friend is lucky and the Device ID is X1a, then the device is capable of connection to the US/Aus/S America/S Africa 850Mhz 3G band
3) if the Device ID is X1i, then no such luck. This is a hardware issue, not firmware
Both will connect to the 2100Mhz UMTS band which is commonly used in cities, so if your friend never ventures outside cities the X1i should work OK for 3G

I have a question on this, when SE 1st released info about X1, they mentioned that it's Quand band GSM, GPRS, EDGE, UMTS/3G 850, 900, 1900, 2100. Why when they released it, they had to make 2 versions to support different networks? I think that this is stupid, they can do that for branded phones but not for SE unbraded phones, exactly like HTC and the HD, Diamond and Pro. We pay a lot of money for these for so at least give us full functionality... especially that these phones are more of business phones, so it's expected that people travel with these phones....or am i wrong about that?
thanks

I have an X1i in the US an it works flawless on the AT&T network with 3G (inc. HSDPA!!!)

rwholden said:
I have an X1i in the US an it works flawless on the AT&T network with 3G (inc. HSDPA!!!)
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Click to collapse
In what part of the USA are you?

George Knighton said:
In what part of the USA are you?
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yeah that would be great to know.. Im in LA and i was looking to get one. I know that ATT 3G works both 850 and 1900, but depending on where you are there's one band stronger than the other.

Thanks for the info man.
I really appreciated.
Does anyone know what what band is Rogers 3G running on?
ianl8888 said:
This is a very vexed issue. Please read the thread on 850Mhz 3G connection.
The short answer is:
1) "unbranded X1" is irrelevant. Use Start>Settings>System>Device ID to find the actual device version, ie. X1i or X1a
2) if your friend is lucky and the Device ID is X1a, then the device is capable of connection to the US/Aus/S America/S Africa 850Mhz 3G band
3) if the Device ID is X1i, then no such luck. This is a hardware issue, not firmware
Both will connect to the 2100Mhz UMTS band which is commonly used in cities, so if your friend never ventures outside cities the X1i should work OK for 3G
Click to expand...
Click to collapse

White_Hair said:
Thanks for the info man.
I really appreciated.
Does anyone know what what band is Rogers 3G running on?
Click to expand...
Click to collapse
Please read and search before asking...
You answer is HERE (google search, first link displayed for "wikipedia rogers 3G": the band has always been there waiting for you to read it under "Services": Rogers 3G 850MHz) so you need the X1a, the X1i won't pick that band
Sorry to bother but this has been posted before (read and search before asking)

mrabie said:
yeah that would be great to know.. Im in LA and i was looking to get one. I know that ATT 3G works both 850 and 1900, but depending on where you are there's one band stronger than the other.
Click to expand...
Click to collapse
I'm also on ATT in Colorado (Windsor/Ft. Collins area) and get 3G almost all the time. I've been all over the state and have got 3G service just about everywhere, only rolling over to Edge from time to time.
Oh and I've got an X1i.

40oz2Freedom said:
I'm also on ATT in Colorado (Windsor/Ft. Collins area) and get 3G almost all the time. I've been all over the state and have got 3G service just about everywhere, only rolling over to Edge from time to time.
Oh and I've got an X1i.
Click to expand...
Click to collapse
Gr8 thanks for the info

yeah, I don't get any 3G in canada with my X1i.
I live in Vancouver BC, always in Edge.
I have had an occurence once, but only once! =[

I get HSDPA in the Dallas\Ft. Worth Area, and in Lawton, OK. Everywhere else I go I'm on Edge. And this is with a X1a on ATT.

ianl8888 said:
This is a very vexed issue. Please read the thread on 850Mhz 3G connection.
The short answer is:
1) "unbranded X1" is irrelevant. Use Start>Settings>System>Device ID to find the actual device version, ie. X1i or X1a
2) if your friend is lucky and the Device ID is X1a, then the device is capable of connection to the US/Aus/S America/S Africa 850Mhz 3G band
3) if the Device ID is X1i, then no such luck. This is a hardware issue, not firmware
Both will connect to the 2100Mhz UMTS band which is commonly used in cities, so if your friend never ventures outside cities the X1i should work OK for 3G
Click to expand...
Click to collapse
Nobody in the US uses 2100MHz, AFAIK, and I'm pretty sure Canada follows the same frequencies.
1900, on the other hand, is supported by the X1i, which is used by AT&T, Rogers, and Bell.
The downside is that if you're unfortunate enough to use T-Mobile, the network uses 850MHz only, and you're stuck with EDGE.

man guy this is too simple to find and you open a thread for this??!!??!?! STOP CLOGGING THE FORUMS!!!!!

DIAM110 compatibility in europe?

My wife has a diam110
ROM vs: 1.93.422.4 wwe
Radio vs: 1.00.25.08 (I am sure these are the most ancient versions out there)
Currently using it on Tmobile (with only EDGE data)
Despite searching (sorry, I personally use the CDMA version, so I am a bit of a noob with the gsm phones) I haven't quite figured out the whole band issue (or at least confirmed it)-- I thought the diam110 was just 850/1800/1900 but of course the phone is being used on tmobile which I thought was 900, so does the rom being used allow for quadband 850/900/1800/1900? I have seen the phone listed on the web as triband and sometimes as quadband - is there anyway to know for sure? The data is only edge which I believe is due to the 850/1900 band for HSDPA (ATT?).
So, we are going to Italy and Greece (which I believe are typically 900/1800 band) in a couple of days and I wanted to confirm that the phone service will work (with a sim card). I also assume that we could use edge service but not UMTS: This site http://www.saveonroaming.net/shop_eng.html for example, has data on 900/1800 umts. Since this is a diam110, I assume that UMTS is a no go. But edge should still work?
Also, I assume that changing the phone over to ATT in the US will allow the HSDPA service?
Thank you for any assistance you all can provide.