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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Click to collapse
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.

Forcing a Sensation Tmous 4G to 850mhz..?

I've seen that a few samsungs and european HTCs can do this through service mode, but is there any way to force the Sensation 4G to 850mhz? according to HTC, the modem in the phone does support AT&T frequencies and the carrier with the best connection only supports 850mhz in my country, and i reeeally don't want to buy a new phone.
i know it's a longshot, but it's worth trying.

Be careful, you don't want to ruin your device. Watch for overheating. Watch for force closes. Any signs And go back to normal. Be very cautious overclocking that much
Sent from my Sensation 4G using xda premium

Its not overclocking, its trying to get one of the cellphone frequencies.
FG

realsis said:
Be careful, you don't want to ruin your device. Watch for overheating. Watch for force closes. Any signs And go back to normal. Be very cautious overclocking that much
Sent from my Sensation 4G using xda premium
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i'm not talking about overclocking, it's the data modem, to put it simply, i need to be on AT&T frequencies but my phone is T-Mobile, and i've seen people change it according to their region. is it possible on the Sensation?

Well for starters the only way you would be able to operate on that frequency one your device has to be carrier free meaning unlocked from all gsm carrier's and this will allow your device to operate on that frequency meaning all you would have to do is swap sim cards if your device is carrier free and then you be able to put in AT&T sim card and reboot however you can't do this unless you are carrier free
sent from my sensation 4g using xda premium

The Sensation supports 850mhz for gsm. It does not support 850mhz or 1900mhz hspa (at least the us version does not support 1900 hspa, having aws instead).
So if you are using an att sim and want 850mhz, you would have to switch it to gsm only (although it'd only work with gsm anyway since att uses 850/1900 for hspa iirc, or maybe just 1900?).
Even then, it'd choose between 850 and 1900 depending on signal / area, etc.

ziddey said:
The Sensation supports 850mhz for gsm. It does not support 850mhz or 1900mhz hspa (at least the us version does not support 1900 hspa, having aws instead).
So if you are using an att sim and want 850mhz, you would have to switch it to gsm only (although it'd only work with gsm anyway since att uses 850/1900 for hspa iirc, or maybe just 1900?).
Even then, it'd choose between 850 and 1900 depending on signal / area, etc.
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meaning my sensation is confined to EDGE speeds on said networks??

Compatible networks GSM/GPRS/EDGE
850 900 1800 1900 MHz
UMTS/HSPA
850 1900 2100 or 900 1700 2100 MHz
HSDPA 14.4 Mbps
HSUPA 5.76 Mbps
tmo version supports 900/1700/2100.
looks like the other version not available in america supports 850/1900/2100 for umts.
not sure if there's any difference in hardware or if it's defined in software (not a part that's included in ruu's).

ziddey said:
Compatible networks GSM/GPRS/EDGE
850 900 1800 1900 MHz
UMTS/HSPA
850 1900 2100 or 900 1700 2100 MHz
HSDPA 14.4 Mbps
HSUPA 5.76 Mbps
tmo version supports 900/1700/2100.
looks like the other version not available in america supports 850/1900/2100 for umts.
not sure if there's any difference in hardware or if it's defined in software (not a part that's included in ruu's).
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Its a difference in hardware. The Canadian Bell version supports 850/1900 (AT&T Frequencies) You can use the T Mobile version but you will be limited to edge/2G only.

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

Chinese phones on T-Mobile?

Hi guys,
I'm hoping someone can give me a for sure answer on this. I have a company we met at CES offering me some chinese cell phones. Basically they are an S4 knock off. I have definitely decided against selling these, but since I have a really old phone... I'm thinking about buying one for myself to play with.
I am currently on the t-Mobile network. Here is what their website says about "bands"
T-Mobile's UMTS network operates in Band IV, which uses 1700 MHz and 2100 MHz frequencies. Specifically, T-Mobile uses the 1700 MHz frequency to send information to cell sites and then uses the 2100 MHz frequency to receive information. A device must be able to use both frequencies to use T-Mobile's domestic UMTS network.
Most international UMTS networks operate in Band I, which uses the 2100 MHz frequency.
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and here is the information about the phone:
MS mode: WCDMA/GSM
Frquency band: WCDMA 2100/850 (HSDPA) and GSM 850/900/1800/1900
Wireless transmission: 3G, WIFI 802.11b/g/n, Bluetooth 2.0, EDGE, HSDPA, HSUPA,
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Everything sounds like it should work, but the concern is the 850/2100 on WCDMA. T-Mobile claims it uses 1700/2100.
For comparison, here is the t-Mobile Nexus 4
GSM:850, 900, 1800, 1900 MHz
UMTS: 850, 900, 1700/2100, 1900, 2100 MHz
Data:HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS, EDGE, GPRS
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I do understand that the chinese phone is only 3G, and the Nexus I compare to is 4G.

According to what I just read on another tmousa page (which agrees with your quote) their data (3g, 4g, and lte) all work on 1700/2100 as of this date of posting.
From your quote about your phone, it operates on gsm 1800/1900. That does not match with tmo.
I know you probably already figured this out, but I am searching on same subject, so others will follow.
Blessings!