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[Q] Galaxy s 4g on AT&T 3g

Does anyone know if the galaxy s 4g can be unlocked to work on AT&T 3G like the Vibrant was???

Once unlocked works on all NA gsm carriers

stevm said:
Once unlocked works on all NA gsm carriers
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On AT&T's 3G band!?

stevm said:
Once unlocked works on all NA gsm carriers
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I doubt it, once unlocked it will work on all GSM carriers is true, but it is specifically built for T-Mobile frequency, AT&T has different frequency.
Similar to the situation we have in canada, Rogers Fido Bell Telus work on similar frequencies but Wind and Mobilicity work differently.
As Galaxy S 4G is meant for T-mobile, it will work 2g only with AT&T and for that sake with 4 major canadian providers too...

I would suggest to check what phones arw im at&t and check their specs and bands. Once you do that you will know wether it will work in at&t or not.
Sent from SGS4G

nupicasso said:
Does anyone know if the galaxy s 4g can be unlocked to work on AT&T 3G like the Vibrant was???
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Yes, I can confirm that it does indeed have UTMS band 1900, just like the Vibrant. I'm using it right now on AT&T and I do get 3G...now if only I could figure out how to enable 4G.

toasis2000 said:
Yes, I can confirm that it does indeed have UTMS band 1900, just like the Vibrant. I'm using it right now on AT&T and I do get 3G...now if only I could figure out how to enable 4G.
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I can confirm that it works on AT&T 3G as well. You in fact get faster 3G speeds in some areas because AT&T has some different coverage than tmobile.
I unlocked the SGS4G for my Father In Law who is on AT&T, and it immediately connected to AT&T 3G. 4mbps/3mbps
It won't work on 4G though.

thats becuase at&t dosnt have 4g yeat eventhough they have 4g phones

Why not just get the vibrant instead of all it works on is 3g. It has much much more roms than this phone ever will especially with the release of the g2x and galaxy s2.
Sent from my SGH-T959V using XDA App

joedeveloper said:
I can confirm that it works on AT&T 3G as well. You in fact get faster 3G speeds in some areas because AT&T has some different coverage than tmobile.
I unlocked the SGS4G for my Father In Law who is on AT&T, and it immediately connected to AT&T 3G. 4mbps/3mbps
It won't work on 4G though.
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Why wouldn't 4G work? It's on the same bands, and if you have all the APN info, shouldn't it work?

danstheman7 said:
Why wouldn't 4G work? It's on the same bands, and if you have all the APN info, shouldn't it work?
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Because AT&T hasn't made any tower upgrades to increase speed.
Technically, you are on 4G, but receive 3G speeds.
With T-Mo, you WILL get 4G speeds (10mbps+), because they have the necessary tower upgrades to make that possible.

joedeveloper said:
I can confirm that it works on AT&T 3G as well. You in fact get faster 3G speeds in some areas because AT&T has some different coverage than tmobile.
I unlocked the SGS4G for my Father In Law who is on AT&T, and it immediately connected to AT&T 3G. 4mbps/3mbps
It won't work on 4G though.
Click to expand...
Click to collapse
Anyone know where I can find a detailed (and updated) map showing which frequency is being used in specific areas? I'm [] this close to switch to AT&T and wouldn't mind using this until the iPhone refresh. But if I'm in 850MHZ area, I'll either trade it or sell it, as I originally intended to do.

corys00 said:
Anyone know where I can find a detailed (and updated) map showing which frequency is being used in specific areas? I'm [] this close to switch to AT&T and wouldn't mind using this until the iPhone refresh. But if I'm in 850MHZ area, I'll either trade it or sell it, as I originally intended to do.
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I'd skip out on switching to AT&T- they're terrible.
The 3G upload speeds are a joke, and coverage (at least in my area) is terrible. And don't even get me started on their Tech Support department.
As for the map though, I don't know of any public ones available.

Longcat14 said:
Because AT&T hasn't made any tower upgrades to increase speed.
Technically, you are on 4G, but receive 3G speeds.
With T-Mo, you WILL get 4G speeds (10mbps+), because they have the necessary tower upgrades to make that possible.
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What kind of upload speeds should you be getting then?
I'm getting less than 50kbps upload....
(In AT&T Full 3G Coverage Area)
My download is always around 2MBPS, which is strange, because my iPhone 4 got around 4MBPS in the same location...

danstheman7 said:
What kind of upload speeds should you be getting then?
I'm getting less than 50kbps upload....
(In AT&T Full 3G Coverage Area)
My download is always around 2MBPS, which is strange, because my iPhone 4 got around 4MBPS in the same location...
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Click to collapse
With the upload thing, I may be wrong, but it's probably because they don't have HSUPA on.
And on the download thing with your iPhone, remember, your iPhone can take advantage of both 850MHz and 1900MHz, the GS4G can only take advantage of 1900MHz, so there will most likely be some variation in speeds.

Ahh, I never even knew that it was only 1900mhz compatible on 3G D:
So, does that in turn mean that my phone will not work on AT&T's "4G"? Because that's the main point of me getting this phone over the Nexus S.

danstheman7 said:
What kind of upload speeds should you be getting then?
I'm getting less than 50kbps upload....
(In AT&T Full 3G Coverage Area)
My download is always around 2MBPS, which is strange, because my iPhone 4 got around 4MBPS in the same location...
Click to expand...
Click to collapse
Here in Vegas and surrounding henderson areas my Father in law was getting 4.5mpbs down and 2 up so it's fairly consistent but we have good ATT coverage here as well as Tmobile (which I'm on 4G).

joedeveloper said:
Here in Vegas and surrounding henderson areas my Father in law was getting 4.5mpbs down and 2 up so it's fairly consistent but we have good ATT coverage here as well as Tmobile (which I'm on 4G).
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I'd love to get speeds like that, but I'm in NY.
Worst.Network.Congestion.Ever
oooh and quick question, do you have a thread which has instructions to remove the "Pink" boot or shutdown screens?
Thankyou

danstheman7 said:
I'd love to get speeds like that, but I'm in NY.
Worst.Network.Congestion.Ever
oooh and quick question, do you have a thread which has instructions to remove the "Pink" boot or shutdown screens?
Thankyou
Click to expand...
Click to collapse
Pretty straight forward if you are used to ADB or any other file managing software.
To disable shutdown just rename
/system/media/video/shutdown
to be like /system/media/video/shutdownbackup
For the startup screen look here:
http://forum.cyanogenmod.com/topic/...t-software-not-suck/page__p__36615#entry36615

joedeveloper said:
Pretty straight forward if you are used to ADB or any other file managing software.
To disable shutdown just rename
/system/media/video/shutdown
to be like /system/media/video/shutdownbackup
For the startup screen look here:
http://forum.cyanogenmod.com/topic/...t-software-not-suck/page__p__36615#entry36615
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Click to collapse
Perfect...Took some time to get it working (this is my first time using ADB), but looks great.
Thank you!

[Q] Anyone with TMOB Sensation UNLOCKED, does it show any 3G using AT&T SIM?

I am pretty sure it will only be 2G but just wanted to check...

ekerbuddyeker said:
I am pretty sure it will only be 2G but just wanted to check...
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they will NEVER release a T-Mobile branded phone that will work on both 3G networks before the merger is complete. There is a HTC Sensation that will be released in Canada that will have the same bands as AT&T so you might want to check that one.

nccu_eagles said:
they will NEVER release a T-Mobile branded phone that will work on both 3G networks before the merger is complete. There is a HTC Sensation that will be released in Canada that will have the same bands as AT&T so you might want to check that one.
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Well the Samsung Vibrant works on AT&T 3G...

aNYthing24 said:
Well the Samsung Vibrant works on AT&T 3G...
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Click to collapse
vibrant works on at&t EDGE not 3g/4g

nccu_eagles said:
vibrant works on at&t EDGE not 3g/4g
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Well i have 3g speeds on Att with my vibrant ... Guess the speed test are lying to me
Sent from my HTC Sensation 4G using XDA App

If you are in an area that supports AT&T's 1900MHz frequency for 3G, you may me able to get 3G speeds on AT&T with an unlocked Sensation 4G. At least according to the box the phone supports the 1900MHz frequency. No one has reported using an unlocked Sensation 4G on AT&T's network yet, as far as I know.

Yes it
nccu_eagles said:
vibrant works on at&t EDGE not 3g/4g
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The vibrant definitely gets 3g on at&t. I have an unlocked vibrant in loui
sville and it almost never goes to edge. Google it and see the bands for the vibrant. Its a well known fact.

Confirmed: US Tmobile.com Sensation 4G works in Europe.

This question seemed to come up a few times in the past, not sure if it was properly answered.
Got a Sensation 4G from TMobile Store in NYC last week. Brought it to the UK, and it is able to connect to the 3G network here no problem.
It did not even need un locking to connect to TMobile UK Network.
Funnily Enough, it never says 3G / H, it always says 4G on notification bar.

trev12 said:
This question seemed to come up a few times in the past, not sure if it was properly answered.
Got a Sensation 4G from TMobile Store in NYC last week. Brought it to the UK, and it is able to connect to the 3G network here no problem.
It did not even need un locking to connect to TMobile UK Network.
Funnily Enough, it never says 3G / H, it always says 4G on notification bar.
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Will be very interesting to see if you see roaming charges on your next bill.

trev12 said:
Funnily Enough, it never says 3G / H, it always says 4G on notification bar.
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Click to collapse
The "3G" and "H" symbol doesn't exist on the US Sensation. "4G" is the same as "H", HSPDA.

So the phone is unlocked? Seems odd - Anybody else with a US S4G try a different SIM?

mobilehavoc said:
So the phone is unlocked? Seems odd - Anybody else with a US S4G try a different SIM?
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Mine was locked. I unlocked it yesterday using an AT&T SIM.

secano said:
Mine was locked. I unlocked it yesterday using an AT&T SIM.
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It connects to ATT 3G?

mmeyer4663 said:
Will be very interesting to see if you see roaming charges on your next bill.
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I'm using a UK Sim card (TMobile Exists there as well), so i hope not!

secano said:
Mine was locked. I unlocked it yesterday using an AT&T SIM.
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Could you clarify that?
You don't unlock a phone by using a different SIM. You have to unlock the phone by entering an unlock code. Only after it's unlocked can it use a different brand SIM.

samnada said:
Could you clarify that?
You don't unlock a phone by using a different SIM. You have to unlock the phone by entering an unlock code. Only after it's unlocked can it use a different brand SIM.
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Well...I DID enter the unlock code...we all know that's the only way to do it...
sundar_amn said:
It connects to ATT 3G?
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No 3G, just EDGE.

secano said:
Well...I DID enter the unlock code...we all know that's the only way to do it...
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Click to collapse
What I was trying to establish is whether the phone came unlocked or if you had to unlock it. You've answered. Thanks.

I got an unlock code from a web site, and now my sensation works in spain with Happy Movil.
Sent from my HTC Sensation 4G using XDA App

MyTouch 4G in Germany
I'm in Germany with an unlocked MT4G and, while the calling feature works, the data/internet package does not. Per the carrier here (Tchibo/O2), they use the 1800 band which to my knowledge IS supported by the device.
Any ideas of why this isn't working would be appreciated ... of course more appreciated would be any ideas for a solution.
Cheers,

ellisod said:
I'm in Germany with an unlocked MT4G and, while the calling feature works, the data/internet package does not. Per the carrier here (Tchibo/O2), they use the 1800 band which to my knowledge IS supported by the device.
Any ideas of why this isn't working would be appreciated ... of course more appreciated would be any ideas for a solution.
Cheers,
Click to expand...
Click to collapse
1800 is a GSM frequency, not 3G. 2100 is used for 3G in Germany.
http://www.worldtimezone.com/gsm.html
http://www.gsmarena.com/network-bands.php3?sCountry=GERMANY
According to the specs the MT4G does support the 1800 GSM band, although it's not used in the US. In theory it should work at 2G speed.
If it were me I'd be asking them why I'm not getting 3G on the 2100 frequency, but that may be a coverage issue.

«UNLOCKED SK4G» Only edge data connection :: Fixed?

I've unlocked my SK4G but when I use AT&T using hex editor whiched worked I'm glad to say but I'm getting Minimun data out of it. Are there any kernels that fixes that or can it be done?

TMobile and att use different bands for 3g and 4g. Just like an att iPhone only gets edge on TMobile, a TMobile phone only gets edge on att.
Sent from my HTC Glacier using Tapatalk

wolfepakt said:
TMobile and att use different bands for 3g and 4g. Just like an att iPhone only gets edge on TMobile, a TMobile phone only gets edge on att.
Sent from my HTC Glacier using Tapatalk
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Sad to say this, but he's definitely right about it. You could try to flash the Blaze4G Modem, but I'm doubtful it will work.

i appreciate it fellas and yeah that is sad but ill live lol. oh yea that modem boost didnt work, didnt expect it to though

The new Nexus phones say they are compatible with 4G on both TMO and ATT. Does it have a special dual-band modem that other phones lack?

I installed that 4g modem and the reception was better but the internet is still sucks

bugyika said:
I installed that 4g modem and the reception was better but the internet is still sucks
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yeah what really sucks is using prepaid on att, no data, at all.

bugyika said:
I installed that 4g modem and the reception was better but the internet is still sucks
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If you're using AT&T, it was just said you can't get 4G bands. EDGE is slow.
Sent from my SGH-T839 using XDA

kideskimo said:
If you're using AT&T, it was just said you can't get 4G bands. EDGE is slow.
Sent from my SGH-T839 using XDA
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Unfortunately I'm from Europe and my carrier is Vodafone and I don't know what what to do, because my internet speed is fuc*ing slow and I tried many setups without success. Any idea?

bugyika said:
Unfortunately I'm from Europe and my carrier is Vodafone and I don't know what what to do, because my internet speed is fuc*ing slow and I tried many setups without success. Any idea?
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Tmobile uses 3g\4g bands specific to the USA if im not mistaken, it only shares edge bands with the rest of the world. so edge or 2g is all youll get which is about dial up speed.

yoyowhatup22 said:
Tmobile uses 3g\4g bands specific to the USA if im not mistaken, it only shares edge bands with the rest of the world. so edge or 2g is all youll get which is about dial up speed.
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Thanks for the heads up but my friend bought a t-mobile phone and his internet speed is quite good, my signal is a "G" his "H" and I don't know why, maybe his carrier is similar to T-mobile :-??

bugyika said:
Thanks for the heads up but my friend bought a t-mobile phone and his internet speed is quite good, my signal is a "G" his "H" and I don't know why, maybe his carrier is similar to T-mobile :-??
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im not sure, his phone was desighned for tmobile? (could be a world phone) ((sorry i dont use internet on my phone so im just guessing))

can not get 4g(at&t) on verizon galaxy s3!!!

ok, i got some problem with the verizon galaxy s3. I use at&t simcard on this phone and it seems working just fine. Here's a thing, after set apn setting on the phone i just only get edge speed(2g), i need someone helps me to figure out how to get the 3g/4g speed on this phone or give me a right apn setting for this. i really appreciated. thanks very much!

The bands for AT&T 3G/4G are locked on the handset, you are going to have stick on edge sadly!!

djteotancolis said:
The bands for AT&T 3G/4G are locked on the handset, you are going to have stick on edge sadly!!
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really? so there's no way to unlock these bands? I might consider to resell this phone again. Anyways, thanks for your reply!

hunbemylover said:
really? so there's no way to unlock these bands? I might consider to resell this phone again. Anyways, thanks for your reply!
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Till now no one figured out how to unlock the bands! so your outta luck..would suggest trading it in for a AT&T phone!

djteotancolis said:
Till now no one figured out how to unlock the bands! so your outta luck..would suggest trading it in for a AT&T phone!
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Click to collapse
It's not a worst thing though. I got this one for only 100$ off craiglist and it works just fine. It just does not work right with a data, remind me of few years back when 2g was a fastest data service lol. Thanks again for let me know this issue.

AT&T runs on GSM band while Verizon runs on a CDMA network. I'm surprised your SIM even works. What other said is correct though, you are restricted to the slow 2G Edge speeds.

DarkMenace said:
AT&T runs on GSM band while Verizon runs on a CDMA network. I'm surprised your SIM even works. What other said is correct though, you are restricted to the slow 2G Edge speeds.
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Well the S3 is a World phone, hence it comes with GSM bands too! if you hit Europe or Asia you will get 3G

djteotancolis said:
Well the S3 is a World phone, hence it comes with GSM bands too! if you hit Europe or Asia you will get 3G
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Click to collapse
Right it does. But they use different bands in other countries. Our phone isn't capable of using any and all bands. Only certain ones. If somehow these bands were unlocked, then you could get 3g here.
Sent from my SCH-I535 using Tapatalk 4 Beta