Database Users

GSM from Tri-band to Quad-band,

Hi, can I change touch dual the GSM from Tri-band to Quad-band,
for the better reception in USA.
I know the touch can do that, Thank

Now that its going to be available in the US with quad band, does it mean tri band niki can be changed to quad band?

shupacanucks said:
Now that its going to be available in the US with quad band, does it mean tri band niki can be changed to quad band?
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I would like to know this too

It could be possible, but the RF chipset could be totally different on the two models.
There wouldn't be much of a reason for HTC to restrict the current tri band duals with the way the various operators have deals with other overseas operators.

clonmult said:
It could be possible, but the RF chipset could be totally different on the two models.
There wouldn't be much of a reason for HTC to restrict the current tri band duals with the way the various operators have deals with other overseas operators.
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You would think they would have designed, developed the radio chip long ago, and the new edition would only contain software changes to the OS, and Hardware soft updates

--bump--
I too would like to know if this is possible. The best buy website has a touch dual listed with 850. I called their customer support and they couldn't give me any information on release date or even a model number. Will the US version of the dual have 850? I want to know if I can get this $500 phone to work here (area code 318 with ATT) on just the 1900 band or do I need the 850 band for better reception. Any advice would be helpful. Thanks in advance.
b

Any luck? I would like to upgrade to the quad band

theres only one version of the dual that is quad band and that is the US version being sold by BEST BUY.

Thanks for the reply I figured I was out of luck, so I ordered the us version yesterday.
Bought the triband Dual but, soon figured out that it doesnt work well in the states.
I thought I would give it a go.
Thanks

Was working on 850MHZ than....
My HTC touch was working on 850 MHZ than I had a tech at my provider's, setting up my internet.
Since that moment it does not work anymore:
Getting the signal but not able to make calls or receive calls.
The guy tried to fix it. It worked for a couple of calls and than stopped working.
Back to the tech, he told me it s because of the 850mhz on which they operate.
He said that even if it was working fine, it wasn't meant for their network (850 MHZ).
Should I believe him?
(the phone works fine with 1900MHZ band from another company)
How can I fix this?

wish there was a radio upgrade like the latest for the diamond that enabled the 850 band

Technicality between Magic and myTouch3G

So from what I know,
MyTouch3G = MSM7201A, 192 MB RAM, TriBand 3G (900/1700/2100)
HTC Magic = MSM7200A, 288 MB RAM, DualBand 3G (1700/2100 or 900/2100)
I've done some reading and realized that due to patenting issues with BroadCom, the 7201A was released, limiting video recording to 320x240.
So theoretically, If I have a Mytouch, it can be downgraded to look for only 2 3G Bands and an HTC Magic can be upgraded to look for 3 3G bands.
Both CPUs are Triband 3G Capable. Is there any way to load a rom that will look for 3Frequency bands on the HTC Magic? I am just trying to understand why they are crippling a phone thats Triband capable to only be Dualband 3G.
Even with the HTC Hero, they have gone wrong and done the same stupid crap. Can anyone explain this to me. Am I missing something here?

Why does my mytouch have so much less ram? That's completely devastating

cchhat01 said:
So from what I know,
MyTouch3G = MSM7201A, 192 MB RAM, TriBand 3G (900/1700/2100)
HTC Magic = MSM7200A, 288 MB RAM, DualBand 3G (1700/2100 or 900/2100)
I've done some reading and realized that due to patenting issues with BroadCom, the 7201A was released, limiting video recording to 320x240.
So theoretically, If I have a Mytouch, it can be downgraded to look for only 2 3G Bands and an HTC Magic can be upgraded to look for 3 3G bands.
Both CPUs are Triband 3G Capable. Is there any way to load a rom that will look for 3Frequency bands on the HTC Magic? I am just trying to understand why they are crippling a phone thats Triband capable to only be Dualband 3G.
Even with the HTC Hero, they have gone wrong and done the same stupid crap. Can anyone explain this to me. Am I missing something here?
Click to expand...
Click to collapse
The HTC Magic also comes in the 850/1900 3g variety too!

cchhat01 said:
So from what I know,
MyTouch3G = MSM7201A, 192 MB RAM, TriBand 3G (900/1700/2100)
HTC Magic = MSM7200A, 288 MB RAM, DualBand 3G (1700/2100 or 900/2100)
I've done some reading and realized that due to patenting issues with BroadCom, the 7201A was released, limiting video recording to 320x240.
So theoretically, If I have a Mytouch, it can be downgraded to look for only 2 3G Bands and an HTC Magic can be upgraded to look for 3 3G bands.
Both CPUs are Triband 3G Capable. Is there any way to load a rom that will look for 3Frequency bands on the HTC Magic? I am just trying to understand why they are crippling a phone thats Triband capable to only be Dualband 3G.
Even with the HTC Hero, they have gone wrong and done the same stupid crap. Can anyone explain this to me. Am I missing something here?
Click to expand...
Click to collapse
I think it is a hardware issue rather than a software one to change 3g bands.

I am not convinced... The Chipset supports it...
Anyone wanna take a stab at this? Maybe one of the developers?

Anyone else care to shed any insight to this??
I would love to have a 32a model that supports 1700/2100hsdpa bands, besides the new mt3g limited edtion....

What you are describing is the difference between 32A (288Mb) and 32B (192Mb) HTC Magic. myTouch3G is just a T-Mobile branding, Vodafone still call the 32B "HTC Magic" in their foreign markets like UK, Norway and Australia.
In my experience with other non-phone-handset 3G hardware you are probably right. Radio chipsets usually electronically support all bands, and are locked down to regional frequencies by firmware or software settings. The 3G Cisco routers I work with can run on any frequency they can find which the hardware supports.
Computer 802.11a/b/g WiFi controllers work in the same way, there are frequencies you can/can't use in USA/Japan/EU/Australia but if you get the right software (like DD-WRT) you can use them.
That is, however, usually against the local telecommunications law. I'm not sure if the same legalities apply to mobile phones. You could potentially interfere with a registered emergency channel which isn't a legal situation I'd like to be in.
I am unsure if the MSM7201A and MSM7200A actually have a different radio chip, I've never looked into it. Isn't the current "latest" radio for 32A and 32B a different version? 22.x.x.x versus 33.x.x.x or similar? That would imply a different physical chip.

Anyone who understands this "spectrum" 3g AT&T Tmob issue more than I.... I have a ?

Anyone who understands this "spectrum" 3g AT&T Tmob issue more than I.... I have a ?
Okay so here it goes....
WTF!!!!!!!!!!!???
So I've been reading all day to understand this and I do get how we ended up screwed on 3g from the rest of the world
Tmob is on "aws" which is sort of a halfway between 2100/1900 of Europe at 2100/1700
AT&T is on 1900/850 or 850... I couldn't find a straight answer on that.
Now everyone says this is "hardware" in the phone that dictates this issue. I've been researching (this is where I could use your help) and I'm missing something. Nexus one is using Qualcomm Snapdragon™ 3G QSD8250.... This AMAZING chip is not only the processor but the 3g chipset as well... (correct?) Yet this same chip is in the LG expo and the LG expo has 850/1900/2100 for it's 3g.
It would seem to me... (a simple man) that Qualcomm would NOT produce separate chips but would use some firmware/software to let the chip determine which frequencies to use. Otherwise they would have to stamp out more than one chip instead of just having one factory.
The other major issue I see is antenna length is a physical characteristic based on the radio wave you are trying to receive/send. So that may have to change too but that's more about being optimum than impossible.
Not that anyone has the cash for this but what would stop someone with REALLY amazing soldering skills from switching the two supposedly identical chipsets? Would that extremely silly idea work?
Just a thought that I thought a few people on this forum may understand more than I do.

First, the radio ROM should be the one to dictate what frequencies are supported if the radio chip can support multiple frequencies, which it does. There is a soft radio chip from Samsung (I think it's Samsung) that can be reprogrammed to change which carrier it's supporting, but I haven't read of it being used yet. I believe that's the future, but currently you get a chip that almost universally supports European 3G and quad-band GSM w/EDGE out of the box, and then *one* set of US/Canadian frequencies. That's it.
WIND (new Canadian carrier) is using the same AWS spectrum as T-Mobile US is, so that should give more "pull" for more AWS support in future handsets, but with T-Mobile moving toward a "dumb pipe" arrangement (no annoying a la carte options, no music services, no stupid "extras" to pay for, just voice/data/text plans) the hope is more devices will be available in the open market that will just work on T-Mobile and support whatever you're paying for. Since your ISP is just "there" and "supports" (ish) whatever you're using, the hope is T-Mobile US will set the trend for that behavior here, and WIND might be going the same way in Canada, and FINALLY bring this mentality to North America.
If that works out, expect to see more soft radio chips and ROMs to come out with these handsets so they can be "flipped" from network to network and still support all the data and voice options. If it doesn't (I think it will to some degree), then expect the long and annoying tradition of vertically integrated handset and carrier support where the handset has to be "made" to support whatever options the carrier chooses (for compatibility and being as cheap as possible to make) and not have full, cross network support for devices.

Softchips aren't common and won't be. You could probably swap the chips directly, but it's going to cause issues.
T-Mobile uses AWS, which is 1700/2100 for down/up stream. It's considered GSM band 4, which is different from Europe, who uses a 900 band and a 2100 band, both of those are full up/downloads on close bands, so some places use 900, some use 2100, some offer both. It's a bit different. The Nexus One supposed 900/AWS/2100, meaning it's 100% Europe and T-Mobile compatible. We're seeing more and more of these chips since it's significantly simpler than making Euro + AT&T chips.
Motorola is developing a chip with AWS + 850/1900, meaning sometime next year, we should be seeing truly "USA" model cell phones, which will support any US GSM carrier. Euro+USA full could come eventually, but the addition of AWS means it'd take a 5-band chip instead of Quad band like EDGE.

T-Mobile 3G Upgrade
FCC cleared radio frequencies about 3 years ago, T-Mobile bid on the majority of them and used it to upgrade its network.
Much lulz were had.
Here is a List of UMTS Networks. Pretty much all of Europe uses 2100.
I'll do more research as to WHY, but most carriers opt for certain frequencies because of hardware compatibility and cost effectiveness for when they were upgrading.
That link makes it appear that AT&T is worthless outside of NA, but that's untrue (AT&T has, for the most part coverage worldwide, or so I think...) so I'll do some more research on my lunch break.

Renarudo said:
T-Mobile 3G Upgrade
FCC cleared radio frequencies about 3 years ago, T-Mobile bid on the majority of them and used it to upgrade its network.
Much lulz were had.
Here is a List of UMTS Networks. Pretty much all of Europe uses 2100.
I'll do more research as to WHY, but most carriers opt for certain frequencies because of hardware compatibility and cost effectiveness for when they were upgrading.
That link makes it appear that AT&T is worthless outside of NA, but that's untrue (AT&T has, for the most part coverage worldwide, or so I think...) so I'll do some more research on my lunch break.
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Click to collapse
ATT has some coverage (edge once again) everywhere, some places in canada and australia have 1900, but ATT for the most part is using a freq that's not very universal

The issue is the amplifier module.
I have the Rogers G1 running on AT&T 3G. The radio firmware/software is identicle to the T-Mobile/ADP1 phone.
They did a tear down of the G1's and they both use physically different amplifier part numbers. It's not a part from Qualcomm and has nothing to do with their chipsets. Their chipsets do indeed support AT&T's 3G frequencies, if paired with a compatible amplifier.
Now if someone tears down the Nexus One, and gets the part number for the amplifier, and that amplifier can do AT&T frequencies, it may just be an issue of hacking the radio somehow to enable it.
It's quite possible the amplifier on the Nexus One can handle AT&T 3G, but they didn't bother to "certify" it with the FCC because T-Mobile is te launch parter and AT&T is sucking Apples teet.
One can only wait and see. I'm betting it simple doesn't have the correct amplifier for AT&T.
There are amplifiers that work on all frequencies. Why they don't spend the extra dollar or whatever is beyond me. They are literally THAT cheap.
-James

jmacdonald801 said:
The issue is the amplifier module.
I have the Rogers G1 running on AT&T 3G. The radio firmware/software is identicle to the T-Mobile/ADP1 phone.
They did a tear down of the G1's and they both use physically different amplifier part numbers. It's not a part from Qualcomm and has nothing to do with their chipsets. Their chipsets do indeed support AT&T's 3G frequencies, if paired with a compatible amplifier.
Now if someone tears down the Nexus One, and gets the part number for the amplifier, and that amplifier can do AT&T frequencies, it may just be an issue of hacking the radio somehow to enable it.
It's quite possible the amplifier on the Nexus One can handle AT&T 3G, but they didn't bother to "certify" it with the FCC because T-Mobile is te launch parter and AT&T is sucking Apples teet.
One can only wait and see. I'm betting it simple doesn't have the correct amplifier for AT&T.
There are amplifiers that work on all frequencies. Why they don't spend the extra dollar or whatever is beyond me. They are literally THAT cheap.
-James
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Click to collapse
Or sell two (or more) versions of the phone?
850/1900/2100
900/1900/2100
1700/2100
I would guess ... idiocy.
Even more idiotic ... phone manufacturers building phones with NAM 3G frequencies ... but not selling them.

It seems the Nexus One at least has the hardware to support AT&T 3G, see my post here.
http://forum.xda-developers.com/showthread.php?t=612950
-James

What is the difference between the US variants?

what is the difference between the sprint, verizon, and AT&T models?

Kolton545 said:
what is the difference between the sprint, verizon, and AT&T models?
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The biggest difference are the radios. By that I mean the physical chips used. Verizon and Sprint are on CDMA + LTE. AT&T is on GSM/HSPA+ and LTE. T-mobile is GSM with 42mbps HSPA+.
Even with LTE, each carrier has chosen to use different frequencies. So unfortunately LTE will continue fragmentation and prevent people from simply taking their phones to another carrier and expect the same service.
Aside from the radio, the phones are identical minus the bloatware. Cosmetically they are identical.

And the little logo on the back has the carrier name lol

Maverick777 said:
The biggest difference are the radios. By that I mean the physical chips used. Verizon and Sprint are on CDMA + LTE. AT&T is on GSM/HSPA+ and LTE. T-mobile is GSM with 42mbps HSPA+.
Even with LTE, each carrier has chosen to use different frequencies. So unfortunately LTE will continue fragmentation and prevent people from simply taking their phones to another carrier and expect the same service.
Aside from the radio, the phones are identical minus the bloatware. Cosmetically they are identical.
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Actually, the 8960 processor has the modems built-in for LTE/CDMA/HSPA/GSM.
The dual-core MSM8960 is the world’s first dual-core solution with an integrated multi-mode 3G/LTE modem and was designed to meet the requirements of multi-tasking smartphones and tablets. It will include dual asynchronous CPU cores which can be independently controlled for maximum efficiency. The MSM8960 will also support dual-channel LP DDR memory and will feature the Adreno 225 GPU which delivers eight times the performance of the original Adreno.
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That's why the 8960 is compelling for its long battery life. The modem for everything is built into the processor.
The only thing that's different between the devices, literally, is the baseband hardware that tunes to the different frequencies. The associated software radio that controls this would be different as well.

T-Mobile's new spectrum and phone compatibility

T-Mobile recently acquired a lot of low band spectrum that is supposed to improve reception inside buildings. They say that the T-mobile phones that will be able to take advantage of this spectrum will only be available later this year.
How does it work with spectrum and unlocked non-carrier specific or international versions? Are they compatible with low band spectrum? How can one find out?

I believe it's the 600mhz spectrum and V20 I don't think has the right antenna to use it. As far as I know not even The s8 has it

railshot said:
T-Mobile recently acquired a lot of low band spectrum that is supposed to improve reception inside buildings. They say that the T-mobile phones that will be able to take advantage of this spectrum will only be available later this year.
How does it work with spectrum and unlocked non-carrier specific or international versions? Are they compatible with low band spectrum? How can one find out?
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Click to collapse
Most likely you're thinking of band B12/700MHz. From checking that site, many of the LGE V20s include that band (both US996 and H918).

No idea what band is gonna be used but I did read about T-Mobile acquiring the 600Mhz spectrum. Unfortunately our v20s won't be compatible. More than likely will only incorporate phones made later this year.

railshot said:
T-Mobile recently acquired a lot of low band spectrum that is supposed to improve reception inside buildings. They say that the T-mobile phones that will be able to take advantage of this spectrum will only be available later this year.
How does it work with spectrum and unlocked non-carrier specific or international versions? Are they compatible with low band spectrum? How can one find out?
Click to expand...
Click to collapse
We will not be able to make use of 600mhz spectrum on any device "To say the least" older then the Note 8 "Presumably the first phone to have 600mhz capable hardware in the coming months"

I find it strange that no V20 is able to utilize 600 MHz spectrum. It was my understanding that until now, other carriers such as ATT did have 600 MHz spectrum. It was just T-Mobile that was deficient. So should not a non-carrier specific phone, or an international model have hardware to use it?