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Question on purchasing a Tilt

Ok well I am considering purchasing a unlocked AT&T Tilt, but I have been reading a bit about the 3G. Currently I am a T-Mobile customer and have read they will be operating on a different band frequency for their 3G. T-Mobile will be using 1700/2100MHZ while AT&T operates on 1900/2100MHZ. Will the 3G on the phone still be compatible?
Please someone clear this up
Appreciate it

Kaiser uses (under the Band options for the phone settings)
GSM (So gprs, edge) 850, 900, 1800, 1900.
UMTS (3G, HSPDA where available) 800, 850, 1900, 2100.
So it would be partially compatible, but only on 1900 cells, not the 1700 ones. These might co-exist like in the UK where some operators use all the frequencies for better bandwidth, or they might not. I'd check with T-Mobile what frequencies are operating in the areas you'll use the phone.

Well I live in the US and they still have not rolled out the 3G network here, they said sometime by summer. So if they use 2100 then the 3G still should be able to work? Since they still will be using the frequency except the 1900.

[Q] Change Galaxy S modem to US Frequencies?

No, you'll need to go with a carrier like T-Mobile who support the same frequencies as the international version (I assume, I haven't checked them recently).

T-Mobile has a 2100 MHz band but it's paired with 1700 MHz for AWS so I'm not sure if that would actually work.
The 1900 MHz band would get reception from AT&T, although only in areas where they're using 1900, probably in the city.
That's just for 3G though. If you don't need 3G then T-Mobile and AT&T are both GSM carriers.

you will have 2g coverage with at&t and tmobile, and some 3g with at&t, when you have wcdma 1900 coverage... that's about it

I suck at knowing these radios. But, if you are visiting friends, what you can try to do is borrow their sims from different carriers for 5 minutes and see what works in the area(s) you visit. Just an out of the box thought.

AT&T is using 850/1900MHz 3G/UMTS bands (if i'm not mistaken),
i9000 international version supports 3G/UMTS 900/1900/2100 MHz, 850MHz not included.
so I think you are not able to use the 3G network, but the GSM should be working find although it's much slower.

Yup
That's why us USA folks have to wait for either a USA or Australian Variant of the device.

Thanks a lot for all your replies! I was hoping Samsung would be lazy and build the same radio in all of it's devices. Guess I was wrong. Still, thanks a lot, I'll see how well it works with 2G.

Is there still no way to change the UMTS band on European Galaxies so they work in the US?

Nope. You would have to hardware mod the phone.

They already do on 1900 att and thats that
quaker5567 said:
Is there still no way to change the UMTS band on European Galaxies so they work in the US?
Click to expand...
Click to collapse
Sent from my i9000M

I know this is an old thread, but I was looking for information about what modems are for what phones and came across it and thought that as an AT&T customer, I should clarify some information.
Most of AT&T 3G network uses 1900 MHz. AT&T is also "overlaying" 850 MHz over their existing 1900 MHz to increase capacity. There may be some 850 MHz only locations, but I am not aware of any. For the most part, if your phone supports UMTS1900, you should be able to get 3G anywhere that AT&T's map shows 3G availability.

nkrick said:
I know this is an old thread, but I was looking for information about what modems are for what phones and came across it and thought that as an AT&T customer, I should clarify some information.
Most of AT&T 3G network uses 1900 MHz. AT&T is also "overlaying" 850 MHz over their existing 1900 MHz to increase capacity. There may be some 850 MHz only locations, but I am not aware of any. For the most part, if your phone supports UMTS1900, you should be able to get 3G anywhere that AT&T's map shows 3G availability.
Click to expand...
Click to collapse
if you bought a i9000m from canada. you can use UGKC1 or UGJL2 modem to enable 850
im currently on at&t using i9000m with ZSJPG modem with 850mhz enabled

Just 1900Mhz isn't all that great, kinda slow and spotty. Don't get me wrong, it's usable, but 850 is significantly faster/better at least where I live.
I have an I9000M but occasionally use a modem without 850, and it's not as good.
While there are roundabout ways to get 850 on other modems, I usually use one of the Bell ones like JL2 or KC1.

I am using jl2. kc1 did not work reliably with my microcell and would instead keep trying to pull in weak signal thus sucking battery. As for 850mhz only.. most of the I93 corridor on new England is 850mhz only.
Sent from my GT-I9000 using Tapatalk

Frostshock said:
T-Mobile has a 2100 MHz band but it's paired with 1700 MHz for AWS so I'm not sure if that would actually work.
Click to expand...
Click to collapse
It's not paired. It's a single band that uses 1700 MHz for upload and 2100 MHz for download. Just like the international 2100 Mhz band uses 2100 MHz for download and 1900 MHz for upload.
http://en.wikipedia.org/wiki/UMTS_frequency_bands

So just to clarify, my stock i9000m, running 2.3.3 and UGKG3 will get 3G in southern California on both the 850 and 1900 bands? UGKG3 can use both bands?
Sent from my GT-I9000M using xda premium

[Q] Can I change the Galaxy S phone frequencies using different Modem driver?

Do all the Galaxy S variations have the same modem/phone frequency hardware?
If so, I wondered if I could use Odin to flash the Captivate modem into the Galaxy S I9000 and get the USA phone frequencies working???
I have a Captivate now, but I much prefer the central recessed home button of the I9000. But the I9000 frequencies dont work with Telecom XT in New Zealand. (Captivate does work here)
So... can I just flash with the Captivate Modem into a Galaxy S and get it working in the UMTS 850 Mhz range?
In a nutshell, I just want to get the I9000 to work on the Captivate Mhz bands...
Captivate bands are...
GSM: 850, 900, 1800, 1900
UMTS: 850, 1900, 2100
I9000 bands are...
GSM: 850, 900, 1800, 1900
UMTS: 900, 1900, 2100
(I did do a search but got conflicting answers)
Thanks for your help.
Scott

No... diff hw
Sent from my GT-I9000M using XDA App

lgkahn said:
No... diff hw
Sent from my GT-I9000M using XDA App
Click to expand...
Click to collapse
Hmmm... bugger.
I suspected that, but I asked the same question within another thread and was told changing the modem would pork.
Now I must pray to the internet god that they will provided definitive guidance... preferably within this thread

Heaps have tried but its dif hardware, Why else would you get the EXACT same hardware as AT&T/TELSTRA Captivate? They all use 850mhz UTMS. If the phone works for you then great as 850mhz is better then 900mhz due to it being able to go through walls better and other mumble jumbo. Also you can't change the face/lcd as they are dif too. Seems like its a dif phone all round

U can get an I 9000m from Canada... looks like std I 9000 but has bands u want... that is what I did.. there are threads about it search.
Sent from my GT-I9000M using XDA App

[Q] Enabling all of I9000 quad WCDMA bands

Hi fellas,
I was wondering if enabling all WCDMA bands 850, 900, 1900, and 2100 of our i9000 phones would produce any bad effects or would deteriorate our phones or its parts?
I tried to enabled them in *#2263# and they seem to be persistent so i believe they are active. It was initially set as 900/1900/2100.
Looking forward for replies

if you bought i9000T it's supposed to work with 850 what the others can't, that's from what I know..

I'm just not sure if it is really functioning or how to verify if the phone is really using the 850 or 900 wcdma band, or both (together with 2100 and 1900). AFAIK, wcdma's requirement is that at least 2100 is enabled, paired with another supporting band either 1900, 900, or 850. (tho just 2100 solo will also work but not as best if without another band to use)
I'm also wondering, if the original i9000 can support quad GSM and quad WCDMA, why is it that it is only set as tri-WCDMA only?
I guess my only concern is that if the phone's antenna system will be damaged if i enable quad band WCDMA (if it is really using it)

Folks,
If you have checked with the Service manual and Schematics, some variants of Samsung Galaxy S lack the required PAM for the UMTS Band VIII (900) operation physically, while some lack the required PAM for the UMTS Band V (850) operation. Sure, we can flash it with the corresponding modem.bin, toggle "WCDMA 900 (FDD VIII)" and/or "WCDMA 850 (FDD V)" with our targeted Galaxy S variants in the Band Selection menu but it does not mean they will actually work in the "Quad-band WCDMA" as we would like.
Try to hook one up with a set of signal isolation box, signal generator and analyzer (R&S, Agilent, etc.), then you will find out our Galaxy S is capable of "Quad-band WCDMA" or not for sure. DO NOT get confused with the "Quad-band GSM"... "If it can do quad-band in 2G, then why not in 3G?" BECAUSE the it is handled by another set of PAM and FEM.
Nevertheless, most of us are doing fine in the EURO/RoW regions where most 3G networks are deployed in the UMTS Band I (2100). Unless we are heading to the rural or specific areas where only has got the 3G service in the UMTS Band VIII (900) only (AND we apparently must use the 3G service at the same time).

thanks howipig, very nice answer

Project1.exe said:
thanks howipig, very nice answer
Click to expand...
Click to collapse
Project1.exe,
No problem but I wish someone out there can make our dream come true by adding the right PAM and SAW filters for the "extra" 3G band support

i'm thinking if it would be possible to extract files from, say, a Rogers (Canada) SGS for the 850, and combine them with euro for 900. I'm actually using XWJV1 (leaked gingerbread) and I got excited cause I see both options.

Project1.exe,
Like I have mentioned before, the software is just part of the puzzle. We can toggle all 3G bands showing in the Band Selection menu. In fact, I have played with a modified Galaxy Tab that even has UMTS Band IV (AWS) selected too! But in reality, it never works on the AWS band. The PHYSICAL hardware is the key. Without the right components, we are not going to make it happen.

howipig said:
Folks,
If you have checked .... UMTS Band VIII (900) operation physically, ... the same time).
Click to expand...
Click to collapse
heh sorry, missed that one.
Thanks again howipig

[Q] DO all AT&T trills have UMTS850 & 2100

Can you tell me the differences with the Trill and the p925G and p925H. I live in NZ and would like to purchase a phone that is compabiblywith the XT network from my understanding I should be able to purchase a At&T P925 phone but unsure.
The Bands I'm after are 3G (I think this is also known as UMTS) 850 & 2100Mhz, does the At&T phone cover this, ie if I purchase any AT7T p925 of Ebay it will have these freq.
The main reason I didn't go for the p920 is that is doesn't have the 850.

The AT&T branded thrill uses the following...
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 1900 MHz

Ta, do they have 2100?

It does. All the smartphones I got from AT&T have the 2100mhz
http://www.thrillbylg.com/thrill_by_lg_specs.pdf scroll to the bottom for HSPA+ band.