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.
Hi guys,
I'm looking to buy a Galaxy SIII from the States to use here in Australia, and am having a hard time understanding the intricacies of the cellular bands. I get that CDMA stuff is a no go (Verizon, Sprint) and that it seems only TMobile and AT&T are possibilities. Here is a chart with the variants and their banding listed. http://en.wikipedia.org/wiki/Samsung_Galaxy_S_III
The variants support all 2g frequencies, but I don't understand how the 3g part works. The t-mobile one in the 3g band is
850, AWS (Band IV), 1,900, 2,100 MHz UMTS / HSPA+ / DC-HSPA+
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, which doesn't include the 900 that some networks use here. Will the phone use only 2G if this is the case? Will that make any difference to me? Will the AT&T one work as well?
Can someone please give me some clarification? :victory:
Below is the info for Aus carriers...
2G
2G, other wise known as GSM, is standard on almost all phones (except CDMA phones in the USA). Most new phones come with quad band GSM support. A quad band GSM phone supports 850, 900, 1800, and 1900MHz.
2G is old technology and provides a fall back position when 3G coverage is unavailable.
Australian 2G bands:
900Mhz (Telstra, Optus & Vodafone)
1800Mhz (Telstra, Optus & Vodafone)
3G
There are several 3G networks operating in Australia. 3G frequencies are usually specified as UMTS/HSDPA or WCDMA frequencies on the mobile phone specifications.
Australian 3G bands:
850MHz (Telstra, Vodafone) – Exclusive 3G band
900MHz (Optus, Vodafone) – available in most metro areas on Optus, with both Optus and Vodafone re-farming the 2G 900 spectrum in regional and rural areas
2100MHz (Telstra, Optus, Vodafone) – Exclusive 3G band
According to HTC.com, this phone has the 1800 MHz LTE band (LTE band 3).
I am currently in Australia, using a Telstra LTE SIM, and I can't pick up LTE on my phone.
I tested this SIM in another phone and it gets LTE, so the problem isn't the lack of reception in my area or the SIM.
I get 3G and H data but no LTE.
I know Telstra uses 1800 MHz for LTE.
I tried changing from Global to GSM mode and all the other modes as well as all the options available in the phoneinfo app.
It seems like this device has the 1800 MHz LTE band blocked, what can be done about this?
Thanks!
I got the Dual Xperia Z3 today, I have a number with Wind and number with Virgin mobile here in Canada.
I installed both nano sim cards in the device but it wont allow me to use both at the same time. If I turn on one, the other goes off, if I turn on the other one, the first one goes off.
The device tells me one can do data while the other does gsm only, both carriers use gsm, so whats up? why am I not allowed to use both cards at the same time?
I just want one for data (obviously), but I want to be able to send/receive messages and calls for both.
I s that not possible?
Just found this:
Apparently only Rogers or Fido (rogers is the worst at scamming their costumers) use those bands.
For the unlocked (international) fans - The big three Canadian network frequencies
Partial C/P from http://www.tintedgreen.net/guide-will...
Telus (including Koodo)
2G
CDMA 850/1900
EVDO 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
1x EV-DO CDMA2000
4G (called 4G+)
LTE 1700/2100
Bell (including Virgin Mobile, PC Mobility)
2G
CDMA 850/1900
EVDO 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
1x EV-DO CDMA2000
4G
LTE 1700
Rogers (including Fido, Petro-Canada Mobility)
2G
GSM 850/1900
GPRS 850/1900
EDGE 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
4G
LTE 1700
virgin isnt gsm
Just wanted to post this as I'm at T-Mobile user and just recently found out that they also use Band 5. So we will be able to use at least Bands 2, 4, 5, and 12. T-Mobile LTE Bands Now what would be awesome would be able to add band 66 or even convert a band. Now sure if thats possible, just wishful thinking.
Been reading about tmobil and sprint for assurance wireless all day just seen your post thank you. Trying to port number to k40 phone but uses sprint towers and sim but am getting closer and closer. Useful info. Here is the site info I found right before this post:
In most markets the T-Mobile 3G / 4G network operates in the Advanced Wireless Services (AWS) 1700/2100 MHz band and/or the Personal Communications Services (PCS) 1900 MHz band using Universal Mobile Telecommunications System (UMTS) and High Speed Packet Access (HSPA) technology. T-Mobile also operates in the 700 MHz band in some markets. 5G devices on T-Mobile’s network must support either 660 MHz (low-band) or 28/39 GHz (mmWave). In order to connect to the T-Mobile 3G / 4G network a device must support UMTS and HSPA technology in the AWS 1700/2100 MHz band and PCS (1900) band. The T-Mobile 2G network operates in the Personal Communications Services (PCS) (1900) band. To connect to this network a device must support GSM technology in the PCS 1900 band
so now i know which towers sprint and assurance can work on for on this much beter phone once i change some settings which i am hoping can be done all by using the built in phone code and changing the settings and adding a custom rom recovery with the use of no PC via ENGINEERING MODE. Any ideas or thoughts, or should I not have wasted your time.