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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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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 !.
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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!!!!
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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

3g for att

Is there a version of the diamond that will get 3g with att us ?(850mhz band) I have seen the update that gives the 850 band but I was told it isnt for the 3g. I really want a diamond but not having 3g is gonna be a real deal breaker for me.

I've got 850MHz on 3G here with the 1.00.25.05 radio ROM which came on my device (works on Telstra NextG here in Australia which is 850MHz HSDPA).

really? I just read where the fcc just passed the us version of the diamond for the 850 band on hsdpa. Anyone else can confirm they are getting 3g with there diamond in the us?

poedgirl said:
I've got 850MHz on 3G here with the 1.00.25.05 radio ROM which came on my device (works on Telstra NextG here in Australia which is 850MHz HSDPA).
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did you buy your diamond from telstra???

frozenwaffles said:
did you buy your diamond from telstra???
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No I did not, I have the UK version. The Australian version isn't available for another few weeks.

no it is out now but only in certain telstra stores...
so how do you know you are operating on the 3g 850Mhz band???
what radio and firmware are you using?
i want my next g speeds!

I know I'm on the 850MHz band as that's what Telstra NextG uses (with HSDPA). As I said above, radio version is 1.00.25.05 and ROM is WWE 1.93.405.1. All this info is in my signature as well.

3G on ATT
I just got my Diamond Touch today and it came with the
RADIO: 1.00.25.05
ROM: 1.93.456.2 WWE Dated (7/10/08)
O/S: CE 5.2.19965 (Build 19965.1.2.3)
I'm only getting (E)dge on AT&T
No (G) or (H)
My upgraded TILT/TYN II connects to G3 and H at my location here in Los Angeles.
I hope someone figures out a way to get at least a G3 and 850Mhz radio.
Does it just need to be unlocked ??

poedgirl said:
I know I'm on the 850MHz band as that's what Telstra NextG uses (with HSDPA). As I said above, radio version is 1.00.25.05 and ROM is WWE 1.93.405.1. All this info is in my signature as well.
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Hi#
In another thread somone posted that Telstra uses 850mhz for its 3g network and 2100mhz for its joint 3g venture with 3. I'd be happy though if they used 850/900mhz for 3g in the uk though

I am totally confused here, Everything that I have read says that there is no way that the diamond's that are currently out there has the 850 band hsdpa. No software update is suppose to give it the hsdpa band because it lacks the HARDWARE. I know that the gprs band of 850 is able, is it possible that you are connecting to some other band of 3g in your area? I really wanna buy a diamond but I dont wanna be stuck with this phone and not be able to use 3g in my area (us) PLEASE SOMEONE ELSE SHED SOME LIGHT HERE. There are people in this thread that say it dont work and then there are people that are saying it does, thanks for any help

Not true. It's not a hardware issue, it's radio issue.
After you get the diamond and flash that radio there is a setting to change the band. I don't remember it though T.T

can someone confirm that i can use the diamond on us 3g band (850) by just a new radio and setting?

She's probably getting the 2100mhz HSDPA band in AUS unless she's edited the radio, the phone is only capable of 900/2100mhz HSDPA right now. Here's the killer... The Touch Pro just passed FCC... And no HSDPA/UMTS/WCDMA whatsoever. No 3G.

X1a/X1i ROM and Radio Support

I'm wondering if all ROMs and radios are compatible with both the X1a and X1i or just one of the two. Thanks in advance!

Yes. All ROMs and Radios are compatible with X1a and X1i.

Thanks! And also, all radios are compatible with all carriers, correct?

Yeah thats right.
Although, I would note that in my experience, the Radio that came with my X1i last year (probably the oldest one and original Stock Radio for the device), did not keep signal with the UK Hutchison 3G Network (2100MHz UMTS/HSDPA)... But Radios from 1.10 to 1.14 are fine. ... Thats just an observation I made.

So any news on 1700-2100 3G support for T-Mobile US? Are there any radios available that are compatible with this network?

SEX_1 said:
So any news on 1700-2100 3G support for T-Mobile US? Are there any radios available that are compatible with this network?
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no update? im still waiting to see if i can speed up my all powerful X1 to my scrawny g1's speed

Radios are from I gather are merely firmware updates for the communication radios (GSM, 3G, GPS, Wifi, BT) in your device. You can't change from a X1i to a X1a with a flash, you'd have to change the hardware.

Flash x1i rom onto x1a

I have recently ordered an x1a and was doing some reading preparing on what rom I will flash, then it dawned on me that my favorite rom; EnergyRom is actually made for a x1i...
I was trying to find out if it will be ok to flash the roms made for a x1i on a x1a.
And would the 850Mhz and 1900MHz 3g bands both still work.
And would that allow it to record video at [email protected]?
Since i heard that x1a's are limited to [email protected], or [email protected]

anyone?... I can't belive this question has never come up.

Yes the rom will work fine on it.
http://forum.xda-developers.com/showthread.php?t=467656&highlight=flashed+x1i+x1a
Regards,
WC

Stalix said:
And would the 850Mhz and 1900MHz 3g bands both still work.
And would that allow it to record video at [email protected]?
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Yes you will keep 850MHz and 1900MHz
No it does not allow 30fps recording
Both are hardware designed so rom can't change them

Yes. As Mopral said. Alas, most killer ROMs here and elsewhere are for X1i. But that hasn't stopped us X1a owners to use or enjoy them.

thanks all, i knew it would work, but i was hoping to make sure that my umts bands were using both 850 and 1900.
I have started another thread asking for a way to test these bands individually to make sure the 850mhz works, and that te x1i rom hasn't disabled it.

aren't the radio things cleared / defined by the radio rom u use?

Did SE give me the wrong rom?

I had an 1Xi it broke, sent it into SE here in the US. They could not fix it so they sent me a new phone today an X1A. The phone says X1A on the sticker behind the battery. But everywhere else on the phone it says X1i
Phone name is Xi1, Rom says Generic_UK
and i only get H connection on my 3g att sim.
What can i do ??
Does this even matter as i am planning on dowloading some of the custom roms here

Same here says x1i instea od x1a while I ahve x1a replaced

this is really really weird.
But the question does it matter what rom phone comes with if one is going to flash a new rom to it anways ?

tweety82 said:
this is really really weird.
But the question does it matter what rom phone comes with if one is going to flash a new rom to it anways ?
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Does not really matter as you can flash any ROM that you want to try. I suggest that you try reading the tutorial on how to flash ROM's before proceeding. Have fun!

laurence0609 said:
Does not really matter as you can flash any ROM that you want to try. I suggest that you try reading the tutorial on how to flash ROM's before proceeding. Have fun!
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Laurence, im watching the videos right now how to do it. One thing is was curious is about all the roms dont distinguish between xi or xa how do the phones work in the various networks then ??

tweety82 said:
Laurence, im watching the videos right now how to do it. One thing is was curious is about all the roms dont distinguish between xi or xa how do the phones work in the various networks then ??
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Well, you will only find out which one works for you once you try the ROM's cooked in theis forum. I suggest that you try the one created by Agent_47. For me, and at the moment, it's one of the fastest and most stable ROM so far. Try this link and download version 2.9 FS-G. If that does not work, you can try others. http://forum.xda-developers.com/showthread.php?t=512050

laurence0609 said:
Well, you will only find out which one works for you once you try the ROM's cooked in theis forum. I suggest that you try the one created by Agent_47. For me, and at the moment, it's one of the fastest and most stable ROM so far. Try this link and download version 2.9 FS-G. If that does not work, you can try others. http://forum.xda-developers.com/showthread.php?t=512050
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Yes, it does work on various networks. As you can see, i'm from the Philippines and was flashing different type of ROM's and they all work.

laurence0609 said:
Yes, it does work on various networks. As you can see, i'm from the Philippines and was flashing different type of ROM's and they all work.
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laurence got another quick question for ya
so im following the video doing step 1 backing up original rom.
I am at the step of the pdocread -l
i do it but it does not copy a file to my x1 like it does on what the video shows any ideas ??
running windows 7 if that matters

tweety82 said:
laurence got another quick question for ya
so im following the video doing step 1 backing up original rom.
I am at the step of the pdocread -l
i do it but it does not copy a file to my x1 like it does on what the video shows any ideas ??
running windows 7 if that matters
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Click to collapse
Sorry but could not help you there. I did not back-up my ROM when i first flash my device. If, for some reason, you do not want the cooked ROM that you flash, there is always an available original ROM on this forum.

and H connection under 3G icon place is showing you have HSDPA connected, what is alot faster then 3G

So from what everyone is saying it does not matter LOL
especailly with me putting custom roms in the phone.
Just funny how SE cant get their crap together and give u wrong rom with a phone model.
But what i dont get is the X1i and Xia has different hardware right. So how do does the same rom wrong on both models, regarding getting 3g. As in the usa we have different band from the rest of the world. Would that not mean u would need to download a custom rom that supports x1A ?? i dont see any roms out there that says they are for x1a or x1i.

Whoa hold on there. It certainly does matter if you had an X1a and they gave you an X1i! For ROMs it does not matter. They are interchangeable between the two. But it does matter in terms of network coverage.
First, to explain the H, UMTS is 3G. HSDPA and HSUPA are upgrades for downlink and uplink speeds to UMTS. Is you have both HSDPA and HSUPA, it is then just said that you have HSPA in which case you will see 'H' instead of '3G'. HSPA is sometimes called 3.5G.
ATT uses 1900mhz for 3G in some places and 850mhz in others, though most of the time it is 1900mhz. The X1i supports 3G on 1900mhz but NOT on 850mhz. The X1a supports both. So with an X1i there are some places that may have 3G and you wont get it. It sounds like 3G is on 1900mhz in your area so you see no difference but if you want to get 3G everywhere ATT has is you need your 'a' back. I have ATT and an X1i and dont mind. I get 3G in hampton roads and northern VA, as well as in NY. I am satisfied. Hopefully they will roll it out here in bburg soon (I was told by the store rep when I signed up that it would come this year) and hopefully on 1900mhz. YMMV.
*edit*
Looks like I read it wrong. You had an 'i' and they gave you an 'a'? Not such a disadvantage there but there is another issue. The X1i is capable of 30fps VGA video recording while the 'a' can only do 15fps and QVGA (due to a lawsuit on Qualcomm in the US; their video compression technology infringed on Broadcomm's IP). So advantages and disadvantages to each.

So physically i have XiA
i guess at the repair center they screwed up and installed the generic_uk rom.
So its better to have H, then the 3g logo? I live in houston texas and when i had my old x1i it also said H.
So when i install a custom rom this weekend(firestom 2.9 looks great)
I will still have an H instead of the 3g logo?
JKingDev said:
Whoa hold on there. It certainly does matter if you had an X1a and they gave you an X1i! For ROMs it does not matter. They are interchangeable between the two. But it does matter in terms of network coverage.
First, to explain the H, UMTS is 3G. HSDPA and HSUPA are upgrades for downlink and uplink speeds to UMTS. Is you have both HSDPA and HSUPA, it is then just said that you have HSPA in which case you will see 'H' instead of '3G'. HSPA is sometimes called 3.5G.
ATT uses 1900mhz for 3G in some places and 850mhz in others, though most of the time it is 1900mhz. The X1i supports 3G on 1900mhz but NOT on 850mhz. The X1a supports both. So with an X1i there are some places that may have 3G and you wont get it. It sounds like 3G is on 1900mhz in your area so you see no difference but if you want to get 3G everywhere ATT has is you need your 'a' back. I have ATT and an X1i and dont mind. I get 3G in hampton roads and northern VA, as well as in NY. I am satisfied. Hopefully they will roll it out here in bburg soon (I was told by the store rep when I signed up that it would come this year) and hopefully on 1900mhz. YMMV.
*edit*
Looks like I read it wrong. You had an 'i' and they gave you an 'a'? Not such a disadvantage there but there is another issue. The X1i is capable of 30fps VGA video recording while the 'a' can only do 15fps and QVGA (due to a lawsuit on Qualcomm in the US; their video compression technology infringed on Broadcomm's IP). So advantages and disadvantages to each.
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Click to collapse

tweety82 said:
So physically i have XiA
i guess at the repair center they screwed up and installed the generic_uk rom.
So its better to have H, then the 3g logo? I live in houston texas and when i had my old x1i it also said H.
So when i install a custom rom this weekend(firestom 2.9 looks great)
I will still have an H instead of the 3g logo?
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Click to collapse
Yes H is better than 3G. On most phones with stock/carrier branded ROMS, the H symboly is disabled so that even if you have HSPA you will still see a '3G' icon. This is done because customers may not know what 'H' means and therefore may complain that they are not getting 3G coverage. Most custom ROMs leave the 'H' logo enabled.
So I take it you are sticking with the X1a? It is a toss up for me. I used to have t-mobile which does not have 3G on 1900 or 850 so it did not matter which X1 I got. I therefore opted for the one with better video recording. Now I switched to ATT. I get 3G signal in all the 3G covered areas that I have visited. As long as 3G here in Blacksburg (where I spend most of the year) comes in the 1900 flavor Ill keep my 'i'.