Database Info

3G Frequencies

Is there a way to change the 3G Frequencies on the G1 to support AT&T 3G network?

Nope, thats a hardware issue.

I thought it was possibly a software issue. If not, is there a way to change out the chip or the incompatable part to make it compatible?

card13 said:
I thought it was possibly a software issue. If not, is there a way to change out the chip or the incompatable part to make it compatible?
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Nope...not going to work for many reasons.

been answered plenty plenty of times.

From what I can figure a hardware change may not be required with the correct radio but we dont know the right radio without the right hardware. lol I know that makes no sense but it makes as much sense as anyone can make of it thus far. When its possible I assure you I will be among the first to do it. Although Im not ready to try installing a new radio without first acquiring a backup phone but if I do Im gonna give it a try and maybe have better luck than the last guy to try.

What about a mini-usb attachment that can receive atnt signals?
I am sure with that and the right software manipulation it could work.

sjbayer3 said:
What about a mini-usb attachment that can receive atnt signals?
I am sure with that and the right software manipulation it could work.
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While it sounds great in theory I doubt anyone would put forth the resources for such a limited market.
You would be best off getting android to work on existing AT&T hardware.

in order to do it we would need hardware which would plug in the bottom and software to tell the phone to use the signal from the attachment.
while there wouldnt be millions in the market i guarantee there are hundreds.
if anyone wants to think about it i dont mind making 50 of em and selling for cost. i have some hook ups in the engineering field i work in

ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy

Shagman68 said:
ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy
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The American G1 has 3G support for HSDPA 1700 MHz & 2100 MHz, both bands I believe are used by T-Mobile. In Europe I believe they use only 2100 MHz band for 3G.
AT&T on the other hand uses 850 and 1900 MHz HSDPA
The phone has the capability for 2G at 850 and 1900 MHz, so technically it can be used on their network, just not at 3G speeds.
Although technically it's possible to design a Phase-Locked Loop to operate at a variable frequency and to be tuned with jumpers or something, it's probably cheaper for them or they might be subsidized to make phones so that they are exclusive for one network in the US.
To me the ideal is more about standardizing the protocols and the frequencies used for all companies, and having all bands available for traffic. But at least in the short-term that's not really good for business and so probably won't happen for a while.
This is all based entirely on a limited amount of research and my opinion, take it for what it's worth.

Europe uses 1900/2100 in a pair (1900 is the uplink, 2100 is the downlink). (source)
Most phones produced these days are tri or quad band and can work (almost) anywhere.. I'm surprised the G1 isn't.

Shagman68 said:
ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy
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TonyHoyle said:
Europe uses 1900/2100 in a pair (1900 is the uplink, 2100 is the downlink). (source)
Most phones produced these days are tri or quad band and can work (almost) anywhere.. I'm surprised the G1 isn't.
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*sigh*.
Folks, you need to learn about UMTS bands before complaining about that the G1 or any other phone can't do this or that when it certainly can.
The G1 is a 3g worldphone. It works on the US 1700 AWS network (UMTS Band IV) and works on the world's 2100 network (UMTS Band I). ATT uses the 1900 Band (UMTS Band II).
Apparently the common names for these networks is being confused with the actual operating frequencies because they don't upload and download on the same frequencies. The 1900 band is not the same as the 2100 band, even though the 2100 band (UMTS Band I) uploads in the 1900mhz frequency and downloads at the 2100mhz frequency range. The 1900 Band (UMTS Band II) uploads on the upper half of the 1800mhz and downloads on the 1900mhz frequency range. UMTS Band II uploads on the frequencies that UMTS Band I downloads.
These bands separate.
TMO 3g band is different from ATT 3g band which is also different from EU 3g band.
The 1700 band (UMTS band IV) is actually made up of 2 frequency ranges like the other bands I and II are: 1700mhz and 2100mhz. In fact, the 2100mhz download range for UMTS Band IV is within the same frequencies used for the Band I download range, theoretically making it cheaper/easier for manufacturers who make Band I phones to "support" UMTS Band IV phone production.
Most phones produced today are NOT "tri or quad-band" 3g phones. In fact, I have yet to find a quad-band 3g phone. If quad-band 3g phones were made, they would be very likely to support the T-Mobile 3g network, because it's the 4th largest UMTS band type (behind Band I, II, and V). I would be very shocked to find a phone which was 2100/1900/900/850 instead of 2100/1900/1700/850.
And the G1 is a worldphone. It works just fine on UMTS in Europe. It is a band I and band IV device.
read these 2 links:
http://www.htc.com/www/product/g1/specification.html
http://en.wikipedia.org/wiki/UMTS_frequency_bands#UMTS-FDD
So to clarify, when you see a list of support bands, this is what you should interpret from those advertised bands:
2100 Band = UMTS Band I (The entire world outside of North America)
1900 Band = UMTS Band II (The Americas, ATT)
1700 Band = UMTS Band IV (The Americas, TMO)
900 Band = UMTS Band VIII (Australia)
850 Band = UMTS Band V (The Americas, ATT)
Outside of North America, the 2100 band is almost universally deployed, even where the 850,900,1700 or 1900 band is deployed.

[Q] aonly working in 2G mode in Mexico

Hi All,
I recently bought a HTC-Sensation 4G from T-Mobile Store in US.
I also purchased an unlock code in the internet.
Getting to Mexico I started the phone and the voice portion worked great...
BUt Data only hooks up at 2G speed, I have a 3G with unlimited data plan...
I have a friend who has an HTC-INSPIRE and his does hookup at HSPA/HSPA+ (3G).
I was told buy a compnay in Mexico that sell a version of the sensation 3G, which they say does have 850 MHZ radio, that T-Mobile Sensations does not have the 850MHZ Band required...
But in various sights I have seen the spec and it says I qoute "Bands 850, 900, 1800, 1900, 2100, 1700"
I have checd the settings menu etc.. and have not found anywhere to change the setting... can someone help?
Thanks,
Peter Fraga

PeterFraga said:
Hi All,
I recently bought a HTC-Sensation 4G from T-Mobile Store in US.
I also purchased an unlock code in the internet.
Getting to Mexico I started the phone and the voice portion worked great...
BUt Data only hooks up at 2G speed, I have a 3G with unlimited data plan...
I have a friend who has an HTC-INSPIRE and his does hookup at HSPA/HSPA+ (3G).
I was told buy a compnay in Mexico that sell a version of the sensation 3G, which they say does have 850 MHZ radio, that T-Mobile Sensations does not have the 850MHZ Band required...
But in various sights I have seen the spec and it says I qoute "Bands 850, 900, 1800, 1900, 2100, 1700"
I have checd the settings menu etc.. and have not found anywhere to change the setting... can someone help?
Thanks,
Peter Fraga
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Sorry, but the US T-Mobile Sensation does not have the 3G 850 frequency. You can't change it. It does support 2G 850, which may be part of the confusion in the frequency listings you've seen. About your only option is to sell it and get the Mexico compatible model.

Your only way arround it is to sell it and get the sensation from bell canada.
Sent from my HTC Sensation 4G using XDA App

PeterFraga said:
I was told buy a compnay in Mexico that sell a version of the sensation 3G, which they say does have 850 MHZ radio, that T-Mobile Sensations does not have the 850MHZ Band required...
But in various sights I have seen the spec and it says I qoute "Bands 850, 900, 1800, 1900, 2100, 1700"
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Click to collapse
Buyer beware.
Lesson one: Every modern phone out there now has quad-band GSM, and will list "850, 900, 1800, 1900" in its frequency list. You know they're talking about GSM (2G) when you see that string of four numbers, because 1800 is a 2G-only band which has never been used for 3G.
Lesson two: If a phone has 850 MHz 3G, you will see the number 850 repeated twice in its band list.
For example:
GSM 850/900/1800/1900 UMTS 850/1900 <--- Yes, buy this phone, because you can see 850 repeated twice.
GSM 850/900/1800/1900 UMTS 900/2100 <--- No, do not buy this phone, because 850 is listed only once and it's under GSM.
Lesson three: If the only band info you can find is 850/900/1800/1900, then the seller is a lazy douchebag who can't even bother to give you the 3G information you need to know.

[Q] 3G on Rogers Wireless

So yesterday I flashed this phone to ICS, its great, thanks guys!
However, I have a question about radio (I'm a software guy not a hardware guy).
Apparently, this phone supports Triple band UMTS 1700 1900 2100 MHz.
Rogers Wireless in Canada 'operates on the frequencies of 850/1900 MHz'
So, why can't I connect to Rogers Wireless with 3G speeds on the 1900mhz band? Does the phone require both 850 and 1900 MHz UMTS to operate 3G on a 850/1900MHz network?
The best connection I can get is EDGE and it's painfully slow...I bought this phone before I had a data plan with Rogers, so I never quite realized this issue...I guess I could just switch to WIND I just want to understand why it cant operate 3G over the 1900MHz band

3g needs 2 bands, one for upload and one for download. And that's why most phones, for example, bringing to the T-mo network you won't get 3g/ 4g speeds since it would need both the 1700/2100 bands and not a whole lot of non T-mo phones have these bands. So in your case a phone to run on Rogers with 3g would need both the 850 and 1900 bands.

the hardware should be able to operate at those frequencies but its software locked to 1700/2100 or 2100 mhz, so if you want 3g/hspa you must be on an operator which uses one of those 2 frequencies

Braccoz said:
the hardware should be able to operate at those frequencies but its software locked to 1700/2100 or 2100 mhz, so if you want 3g/hspa you must be on an operator which uses one of those 2 frequencies
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how do i software unlock it? Does cid uunlocking do this?

Although I haven't use it, I often see 4G Rogers data connection when I'm in Wind's "away" zone. Assuming there are no other models of MT4GS (with different radios) I'm rather sure this phone can use Rogers 3G network.

which 3g bands SGH-T959V has?

Hi all
I just bought new unlocked Samsung Galaxy S 4G (SGH-T959V) on the internet and before to talking to possible providers I got confused about its 3G bands. I've got two specs with different bands:
one says it has 1700/1900/2100 (e.g. see pdadb.net)
another says it has only 1700/2100.
How do I check which 3G bands my phone really has? Is there any way to check it using the phone itself? Like test software or something?
Thank you

From http://www.gsmarena.com/samsung_galaxy_s_4g-3719.php
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 1700 / 2100
Perhaps that is some of the confusion about bands; 1900 is also a GSM band.
T-Mobile, for better or worse, uses the AWS bands, which results in its handsets having a different set of requirements than other carriers.

I've used an AT&T SIM in my SGS4g and was able to get 3G, so I'm fairly positive the phone also has the 1900 HSPA band.

Wikipedia says T-Mobile has 1900 in both GSM and 3G

I dont know what bands they use but I use simple mobile unlimited 3g for $40 or unlimited 4g for $60....$20 sim with free activation. SimpleMobile uses tmobile network
Sent from my SGH-T959V using xda app-developers app

hi help 3g in 1900mhz

hi i read here in a post that mytouch 4 slide is a 3g in 1900 1700 2100, but according to gsmarena it comes only with 3g 1700 2100, as some tmobile units, my questions are:
does anybody knows the real configuration (only 1700 and 2100, or not)?
is there any radio that comes with 3g 1900mhz, even if its not from mytouch 4g slide, maybe other cause i think that the hardware will work in 1900 as 3g instead of only edge like in 850mhz?
is there any secret code to activate 3g band options?
thank you very much indeed

I would trust the gsm arena spec sheet, but haven't confirmed the bands myself. And not you cannot just add bands, they are interdependent of the radio in that sense, you can not add or remove them
Sent from my Nexus 7 using xda premium

To make it easier instead of using the Freqs (Because they overlap with other bands) here are the Bands that the mT4GS uses: Band 1 and Band 4.
Your confusion comes from T-Mobile refarming the 1900 MHz for 3G. This is the one at&t also uses. It is Band 2.
The mT4GS will not work on Band 2 in 3G only 2G. The hardware was made for Bands 1 and 4.
Use this chart it should clear up the confusion:
http://en.wikipedia.org/wiki/UMTS_frequency_bands