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.
I have done some searches and have not found a valid answer to this question. Since the HTC Touch Pro (Rafael), HTC has only put only the UMTS 900 & 2100 3G bands on their unlocked phones. Every phone released since then, has not had the UMTS 850 Band used in North America.
One response HTC purportedly gave was that due to the smaller size of the Touch Pro and the inclusion of GPS, there just wasn't room for more bands. I think this argument is pure BS. The Kaiser had three UMTS bands: 850, 1900, and 2100 and GPS. Making it good for The U.S. and Europe. All the new unlocked devices have 900 and 2100 - for Europe and Asia.
HTC's Touch Pro 2 is also following this disturbing trend having only the 900 and 2100 bands. So European businessmen traveling to the U.S. get no 3G reception on their expensive "top of the line" phone. What's HTC going to say now, there's no enough room in that monster the Touch Pro 2?
Along the sames lines, those in North America cannot buy direct an unlocked 3G phone. They will have to buy their phones directly from AT&T or T-Mobile and get locked into a long term contract to get one.
Everyone on this forum should be upset about this. My guess is that HTC is bowing to pressure from carriers to make the phones unusable on other carriers. This lets the carriers stick it to the customer.
Personally, I'd like to see Quad Band 3G in the phones so they can be used almost anywhere like they could with the Edge networks.
phones that are from htc that are in europe and asia..for example, the htc hd2 and hd.. do they work with cell phone providers like at&t? here are the specs for the htc hd2:
Network -
HSPA/WCDMA:
Europe/Asia: 900/2100 MHz
Quad-band GSM/GPRS/EDGE:
850/900/1800/1900 MHz
I highly suggest you read the specs and find out what band it supports and cross reference it with the bands they use in the US (wikipedia has the answer to that)
totally wrong place for this, but I'm not a mod so...
Any GSM phone supporting quad-band or tri-band with 850 (you need 850MHz at least, 1900 helps in some places) will work on the network. Many phones support this for gsm/EDGE. Very few phones support this with 3g.
If you want to use att 3g, look for a phone with 850/1900MHz support on "UMTS", "WCDMA", "3G", "HS(D/U/blanks)PA", etc. Basically, if it is marketed for AT&T, Rogers (in canada), or some south american providers (claro?), you'll be good.
Most phones will support 2g, though.
EDIT: As an example, based on those specs you list, the phone WILL work with EDGE, but not 3G/HSDPA.
All correct from poly_poly-man + Telstra in Australia uses the same 3G band as AT&T so there you may go shopping
Im thinking of buying an unlocked GSM phone (nokia e55) soon, but im confused by GSM and UMTS because ive never had a GSM phone before. heres what (i think) i know:
Dual band 3g: 900/2100 mhz, will work with tmobile US, but only on the 2100 mhz spectrum, means no roaming.
tri band 3g: 850/1900/2100 mhz, supports tmobile and at&t, the ideal type of GSM for US.
Quad band: not sure.
fortunately ive been able to find quite a few triband e55's, but i just want to make sure i dont buy a phone with no 3g (i would NOT be happy).
btw, tmobile is the carrier im looking to change to soon, so triband is what i think will suit me best. corrections welcome.
Hi,
I am a telstra customer from Australia. Telstra is rolling out its first handset on their new LTE network next week, the HTC Velocity (aka HTC Holiday or Vivid, i think).
The Telstra LTE network currently only runs on the 1800mhz frequency. Telstras 3G network runs on 850mhz australia wide and 2100 i think in built-up areas.
Short of ending my contract early or buying a Velocity outright (which you cant for another few months, according to telstra), I began a search for a mobile device that supports both 3G 850mhz UMTS and 4G 1800mhz LTE. This is a very hard combo to find.
Has anyone else had any luck finding a decent/flagship android phone from HTC or Samsung that supports both these frequencies? I do not care about 2G quadband compatability.
So far all I have come up with is the Samsung Galaxy S 2 LTE, but i cannot confirm this in fact has 850mhz UMTS.