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how do i get my 3g connection to work?

so i bought a unlocked phone on ebay bout a few months from now. i live in canada, also im in rogers network and everything works fine except my connection. i can only go 2g/edge speed but not 3g!! i have a t-mobile phone unlocked.. anybody know what i can do to get a 3g connection? do i need to install a new image or rom!!!!? please help

You may be out of luck on 3G. To the best of my knowledge, I believe Roger's 3G network runs on the 850 and 1900 MHz bands. However, the G1 runs on T-Mobile's 1700 and 2100 MHz bands. So Edge is the best you'll get (speed-wise).

TaurusBullba said:
You may be out of luck on 3G. To the best of my knowledge, I believe Roger's 3G network runs on the 850 and 1900 MHz bands. However, the G1 runs on T-Mobile's 1700 and 2100 MHz bands. So Edge is the best you'll get (speed-wise).
Click to expand...
Click to collapse
T-Mobile's rollout of UMTS in the US will focus on the 2100/1700 MHz bands, whereas UMTS coverage in Canada is being provided on the 850 MHz band of the Rogers Wireless network. I think 1900 was added later as well.
My HTC HD is edge (2G only). But I use a lot of WiFi when ever possible.

[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.
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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.
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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] Samsung i9000 variant for USA and Thailand?

I'm looking to purchase a Galaxy S next month. I live in the USA, but I travel to Thailand every year. I'd like to get one phone that will work on both AT&T and AIS for both voice and data. (3G on both would be great!) While traveling in Thailand, I really want to be able to tether my netbook through the phone.
Anyone have recommendations as to which Galaxy S I should get?

over in Europe + Asia they only have 1 model
they all come with triband 3G WCDMA 900/1900/2100
and quad band Voice/EDGE 850/900/1900/2100
so you wont go wrong in getting any Galaxy S as "There Is Only One" (hmmm... sounds which movie was it from?)
unless you get the wrong Galaxy Lite, or Galaxy 5000 series, or Galaxy 8000 series or Galaxy 7000 series

My concern is the 3G WCDMA 850MHz vs 900 MHz for data. I know that AT&T uses 850 MHz, but AIS in Thailand is using 900 MHz. While it's true that 3G is just starting to roll out in Thailand (limited coverage and all), I would like to get a phone that I'll be able to use when they do get it all covered.
If I get an unlocked Captivate for use on the AT&T network, would putting in a sim from AIS automatically switch the 3G WCDMA over to the 900 MHz band (if available)?
Or is the radio hardware-fixed on this? (I've searched for an answer on this, but can't find a straight answer.)

there is no phone with both 850 and 900 3g...

I think your only chance for a 3G phone that works in both USA and Thailand is the Captivate. True Move in Thailand has 3G on 850mhz, which the Captivate uses.
http://wikitravel.org/en/Thailand#Contact
Sent from my SAMSUNG-SGH-I897 using XDA App

lgkahn said:
there is no phone with both 850 and 900 3g...
Click to expand...
Click to collapse
That's what I thought, but I wasn't sure. I guess the GSM radio is separate from the 3G CDMA radio (since the GSM can do both 850 and 900).
Ben74 said:
I think your only chance for a 3G phone that works in both USA and Thailand is the Captivate. True Move in Thailand has 3G on 850mhz, which the Captivate uses.
Click to expand...
Click to collapse
I'll be traveling to Trat and Koh Chang. True doesn't have coverage there as far as I can tell.
Anyway, thanks for the info!

i would buy the i9000m from canada or the i9000t or i9000b from south america b4 the captivate.. captivate.. has poor 3g upload, and no front camera.

software_samurai said:
That's what I thought, but I wasn't sure. I guess the GSM radio is separate from the 3G CDMA radio (since the GSM can do both 850 and 900).
I'll be traveling to Trat and Koh Chang. True doesn't have coverage there as far as I can tell.
Anyway, thanks for the info!
Click to expand...
Click to collapse
As far as I can tell, there's no 3G coverage in Trat and Koh Chang from any operator in Thailand. You'll only get GPRS/EDGE coverage there.

[Q] Bad ESN's and frequencies in Australia

Hi guys,
I've had a look around and can't really find much info on bad ESN's. Most of the questions are resolved with a -"find a carrier who will reflash your phone". The phone I'm looking at is from someone who didn't pay their phone bill. If I import this phone over to Australia - what will a bad ESN do? I'm planning to buy a pre paid SIM card over here, and I'd like to put a basic Gingerbread rom on it.
I can see that a bad ESN means you wouldn't be able to use the phone on the network it was sold on, but if you unlock the phone doesn't that mean you can put on whatever carrier you'd like?
Are there any issues with doing this?
The next part of my question is about the Vibrant. From the info I've found this...
Will My SGH-t959 (Vibrant) Phone Work In Other Countries And How Do I Unlock It?
The SGH-t959 is a quad band dual mode handset. It supports GSM frequencies of 850, 900, 1800, & 1900. It supports UMTS 1700, 1900, and 2100 frequencies. There is a possibility the phone may be used with a wireless operator outside the United States however this is not guranteed. The phone has been optimized to work on the intended carrier it was designed for.
Click to expand...
Click to collapse
From what wikipedia says on Vodafone (in Oz,)
The GSM mobile service on 900 MHz and 1800 MHz covers 94.52% of the country. The 3G 2100 MHz UMTS network is available in metro areas of major cities and some larger regional centres covering 80% of the population. Expansion of the 3G UMTS network using 900 MHz to equal or surpass the GSM coverage is due to be completed by 31 August 2009 [1] [2].
Click to expand...
Click to collapse
Will this work here? It's seems like it should? (I'm in Melbourne) I'd like the 3g to work for the internet etc.
Thanks guys.

Beumpp....

I can't guarantee it but technically according to the site below, it should work:
http://www.phonearena.com/phones/Samsung-Vibrant_id4747
UMTS[3G] frequencies: 1700/2100, 2100
Optus, vodafone and three use 2100 and 900

LG Thrill is same as LG Optimus 3D?

I have been posting in the optimus forum for help. I just noticed last night in a topic yesterday that LG Thrill and LG Optimus 3D are the same, except Thrill is 4G.
My phone is called LG Optimus 3D p925g, it's from rogers and I got it October 2011. It's 4G.
is mine the same as Thrill?
What happens if I use LG Optimus 3D 3G roms on a 4G?

Nothing happens. It's the same.

ok Thrill must be an american brand name or something.
when I flashed cyanogen mod ROM I remember seeing my 4G turn into 3G icon. Does it actually change to 3G or no?
also is this forum more active for help? I wonder why they have 2 forums if 4G/3G is only difference.

It's not even real 4G though. So it's all good.
The other difference is that the basebands are different.
One is international, the other is not.

The Dark Lestat said:
It's not even real 4G though. So it's all good.
The other difference is that the basebands are different.
One is international, the other is not.
Click to expand...
Click to collapse
not real 4G? What are you talking about.
I don't know what basebands are so okay.

Well if it says 4G, you're getting almost the same speed as 4G. There's a detailed explanation somewhere. I gotta find it.

Its 3.5g the way i have it my p925g. Always says 4g i dont know why even if i dont havr 4g speeds

4G implies 4th generation technology and standards. Ignoring the fact our '4G' is actually HSDPA+ (which is pretty much what 3G was supposed to be, but they did the same marketing BS with 3G)... we are nowhere close to the simple basic, no BS 4G standards of 100MBPS+ data speeds, with true multi-tower connections.
As well, all 4G means for most GSM carriers is that the phone has the HSPDA+ protocol enabled, and the towers in that region have the same... which is a simple software upgrade. You could be on a 500Kb connection, but they call it 4G simply because it has HSPDA+ protocol delivering those 2G speeds with a 3G technology.
The closest thing to true 4G on the market is LTE, which is totally new radio technology and tower technology, not simply a software upgrade that increases speedo's top speed from 5Mbps to 45Mbps, even though the motor is still only capable of 2Mbps.
The motor, btw, is the tower backhaul, and that is the real bottleneck in all of this and is what will determine your actual speeds. As it stands, there isn't enough hard line bandwidth out there to give true 4G speeds, and likely will be 5+ years before there is.
By then we will be on "6G" and some will still be running sub 1Mbps connections despite the hype.

ya we got lte phones hear now system isnt even up but rogers is claming its going to be 150mbps downloads

The Only difference
Thrill 4G Networks GSM 850 / 900 / 1800 / 1900
HSDPA 850 / 1900 / 2100
Optimus 3D networks GSM 850 / 900 / 1800 / 1900
HSDPA 900 / 1900 / 2100
HSDPA 850 / 1700 / 2100

maybe it is
HSDPA 900 / 1900 / 2100
OR
HSDPA 850 / 1700 / 2100
because 1700 / 2100 mean AWS and i don't think this phone (p925g) is aws

don't know what to do.
Hi,
someone offer me a Lg p925G from rogers which is unlocked. the problem: I live in france, when I put a french sim in the phone didn't find no network at all even a simple GSM; I tried to register manually to my network (the phone find it) but say that 's impossible to connect it. The phone is under the last V20C rom from rogers.
My question is simple: is that a hardware problem with the frequencies? or just a problem from the rom?
thanks a lot!