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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).
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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?
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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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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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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] 850 band on GT-I9000

hey,
i have a GT-I9000, and i'm trying to enable 850mhz band for 3g,
i flashed the jjjv5 modem which is 850enabled,
and selected the 850 band through *#2263#*, the second i select 850 i get no signal, does that mean my phone isn't 850mhz capable or does it mean there is no 850mhz reception in my area ?

galaxy s suports all bands
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 1900 / 2100
so you dont have 850 band in your area.

perhaps i was not clear - i'm trying to connect to 850mhz WCDMA band, not GPRS/GSM.

where do you live ? do you have the international i9000?

i live in israel, where we have a 850mhz/2100mhz 3g carrier (Pelephone)
the phone was purchased privately, not from the carrier.
i'm not quite sure about the phone version, the box states UMTS bands as 2100,1900,900.
the writing on the box and every document about the phone states GT-I9000.
does that mean that 850 3g band is not possible for me ?

i9000 doesnt support israel's 850 3g band, you can use 2100 instead which is suported by both ,phone and carrier

f3n0m3no said:
i9000 doesnt support israel's 850 3g band, you can use 2100 instead which is suported by both ,phone and carrier
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I'm also having a similar problem. im in Honduras with Tigo paid for 3g but only connecting to edge, i have the gingerbread xwjw5 build. I have a unlocked gt-i9000

only if you have the I9000T you can use the 850 band

kernelfreak said:
only if you have the I9000T you can use the 850 band
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well guess ill be replacing this phone lol

keen to swap? im in aus and got a i9000t and would like to stay on Optus :/

Why we are having issues with signal...

Got bored and did some research...baked into the software is the bandwidths across the holiday and carriers specific phones...since we are not able to flash radios...this is becoming an issue for a lot of people....so heres what I found thought was interesting...these are controlled by the radios which for now we are not able to flash so until we are able to flash,signal issues will be a factor...
Rogers HTC Raider LTE Specs
2G Network CDMA 800 / 1900
GSM 850 / 900 / 1800 / 1900
3G Network CDMA2000 1xEV-DO
HSDPA 850 / 1900 / 2100 or HSDPA 2100
4G Network LTE 850 LTE 700 / 1700 / 2100
AT&T Vivid Specs
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 1900 / 2100
4G Network LTE 700 LTE 1700 / 2100
Telstra Bandwidths
Telstra will sell dual mode LTE/HSPA+ mobile broadband devices that will operate seamlessly across 1800MHz and 850MHz spectrum bands, giving Telstra Next G network customers the benefits of 4G where it is available and then seamless switchover to the 3GHSPA technology in other areas.
SK Telecom
LTE 850 mhz
WC

No issues, You just have to modify a few files in any SKT or AU based rom.
Battery drain though.... That is another issue & will continue until we get a solid custom Vivid based Kernel that uses Vivid voltages instead of using the Raider Voltages, which as you know, uses a different processor than the Vivid.

Rogers raiders is the same as at&t vivid. The raider in Korea runs differently. Right now we are using 1700/2100 for lte service until the 700 auction can be completed. Then we will use 700 band.
Sent from my HTC PH39100 using XDA App

RAZR I mhz

I have a supposedly "unlocked", RAZR i , however it won't work on any network other than T-Mobile. I've been told T-Mobile UK Motorola Razr I supports T-Mobile UK's network frequency of 1800 mHZ, but, Vodafone, O2 and 3 use an updated 4G network that runs on 1900 & 2100 mHZ. Is this correct and is there any way I can use the phone on the 3 network.
Thanks in advance....
Sent from my HTC Desire using Tapatalk

bl4ckd14mond said:
I have a supposedly "unlocked", RAZR i , however it won't work on any network other than T-Mobile. I've been told T-Mobile UK Motorola Razr I supports T-Mobile UK's network frequency of 1800 mHZ, but, Vodafone, O2 and 3 use an updated 4G network that runs on 1900 & 2100 mHZ. Is this correct and is there any way I can use the phone on the 3 network.
Thanks in advance....
Sent from my HTC Desire using Tapatalk
Click to expand...
Click to collapse
Razr I should work on the following frequencies:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
The device doesn't support 4G. So if the providers can give u 2G or 3G on those freq u can use them.