Develop Bugs

[Q] Can you use this on AT&T network and vice versa when unlocked?

Hi,
I basically want to know if there is any difference between these devices, other than network provider lock.
Can you use the ROMs interchangeably?

I think the tmo model does support att's bands and u can probably interchange roms as well like on the tmo s2 and the skyrocket
Sent from my Galaxy Nexus using Tapatalk 2

minhajmsd said:
I think the tmo model does support att's bands and u can probably interchange roms as well like on the tmo s2 and the skyrocket
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
We don't know for sure yet that the ROMs will be interchangeable. However, given that most T-Mobile phones support the 850/1900 NAM bands (GSM) needed for AT&T HSPA+, as long as the phone is unlocked it should work fine.
Sent from my HTC_Amaze_4G using xda premium

In thinking of doing this. Does anyone know if it works with the Medianet data plan?
Sent from my Galaxy Nexus

Faideelah said:
In thinking of doing this. Does anyone know if it works with the Medianet data plan?
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
The Galaxy S2 did. Reading the specs page on the Tmobile website, I've come to the conclusion that the bands are identical to the AT&T variant's. I'm going to be doing the same thing.

Will hspa+ work? If so, tmo users who will be paying full price would be better off
Buying from att because its less than tmos full price cost.
Plus wireless tethering would work Because tmo doesn't have imei # of att phone.
Can anyone confim?

i would like to know this as well, paying 549 if a lot better than 639.
QUOTE=predation;27809975]Will hspa+ work? If so, tmo users who will be paying full price would be better off
Buying from att because its less than tmos full price cost.
Plus wireless tethering would work Because tmo doesn't have imei # of att phone.
Can anyone confim?[/QUOTE]

FYI only T-MO has HSPA +42 version of the S3 for those looking to buy from At&t.

anyone can confirm this?? does the gs3 from tmo works on att HSPA+ and vice versa and if the tmo gs3 works internationally on 3g networks.

All right,unlocked my T999 galaxy s3, put my AT&T micro sim in phone but I get no data. I can make phone calls no problem.Do I have to do anything with the APN settings?
Thank you!!

You need to make an AT&T APN. Also the AT&T version will not get 3G on T-Mobile without at the very least a modem flash.
Sent from my GT-I9300 using Tapatalk 2

O.K. just added a couple ATT apn settings still no data.any other suggestions?
By the way i have a 4g micro sim.Thought Tmobile S3 had ATT hspa+ bands.
Got apn settings from these forums.

Might want to do a lot of research before trying to flash an att ROM on tmo or vice versa. I heard the tmo phones are quad core.

mrhaley30705 said:
Might want to do a lot of research before trying to flash an att ROM on tmo or vice versa. I heard the tmo phones are quad core.
Click to expand...
Click to collapse
They aren't. All US ones are dual core.
Sent from my GT-I9300 using Tapatalk 2

fender22 said:
O.K. just added a couple ATT apn settings still no data.any other suggestions?
By the way i have a 4g micro sim.Thought Tmobile S3 had ATT hspa+ bands.
Got apn settings from these forums.
Click to expand...
Click to collapse
did you flash an AT&T radio? you will probably need to do that.
how did you unlock your phone? did you just buy a code or did you try one of the XDA methods?

dLo GSR said:
did you flash an AT&T radio? you will probably need to do that.
how did you unlock your phone? did you just buy a code or did you try one of the XDA methods?
Click to expand...
Click to collapse
Forgot about that. You need an AT&T baseband.
Sent from my GT-I9300 using Tapatalk 2

joshnichols189 said:
They aren't. All US ones are dual core.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
So they are. Thanks for providing quick verification on something i heard. :thumbup:

joshnichols189 said:
They aren't. All US ones are dual core.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
Aaaaah!!
Why when something comes to US it has to be downgraded?

barribow said:
Aaaaah!!
Why when something comes to US it has to be downgraded?
Click to expand...
Click to collapse
It isn't a down grade. Do some reading.
Sent from my GT-I9300 using Tapatalk 2

joshnichols189 said:
It isn't a down grade. Do some reading.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
link?

T-Mobile or AT&T?

So there's s3 at T-Mobile but not att? Is it worth going to T-Mobile from.att?
Sent from my HTC One X using xda premium

Switching Carriers over some launch availability issues? Devices are out there now in pretty decent numveds , Best Buy is selling them over the counter today as well.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

I have t-mobile, but if I had att I wouldn't switch just because of handset availability.
If you are out of contract you should weigh the pros and cons of each in terms of coverage in your area, pricing of comparable plans to satisfy your needs, and THEN device selection.
Plus if you wait a lil longer you can maybe get your hands on the red version!

You realise you can get the AT&T GS3 overnighted to you. You just have to call up and ask for one.

I have a new line with the one x and I'm within my 30 days maybe I'll just see if bb has them. I would switch carriers based on horrible service that att has
Sent from my HTC One X using xda premium

I wouldn't switch.. far as I know ( and correct me if I'm wrong ) the T-Mobile version of the SGSIII does NOT have LTE !! To me, that would be a waste.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

LordGeek said:
I wouldn't switch.. far as I know ( and correct me if I'm wrong ) the T-Mobile version of the SGSIII does NOT have LTE !! To me, that would be a waste.
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
Click to expand...
Click to collapse
It has badass hspa+ (42mbps) though which can just as fast as lte depending on location. And it doesnt kill battery like lte, so id say the tmo version is a great option..
Sent from my Galaxy Nexus using xda app-developers app

T-Mobile is cheaper in the long run, and HSPA 41 is faster than any LTE available

z0phi3l said:
T-Mobile is cheaper in the long run, and HSPA 41 is faster than any LTE available
Click to expand...
Click to collapse
Really?
Sent from my AT&T Galaxy S III

z0phi3l said:
T-Mobile is cheaper in the long run, and HSPA 41 is faster than any LTE available
Click to expand...
Click to collapse
lol i don't know about that.. depending on your att plan and the fact that the t-mo s3 is 80 dollars more than the other 3 carriers
Sent from my Galaxy S III

zaisaroni said:
Switching Carriers over some launch availability issues? Devices are out there now in pretty decent numveds , Best Buy is selling them over the counter today as well.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
LOL, Best Buy is not selling AT&T Galaxy S3's over the counter! I dont know where you have heard that, but you definitely haven't been following either of the 2 Official Best Buy Galaxy S3 threads.
If Best Buy does have them in stock for AT&T, which is a HUGE IF, they are saying they cannot sell them because AT&T has not announced an official release date/launch date. I know, that makes not sense and is a huge lie, but that is what they are saying.
So NO, Best Buy is not selling AT&T Galaxy S3's over the counter.

id10terrordfw said:
Really?
Sent from my AT&T Galaxy S III
Click to expand...
Click to collapse
Thank you .. LMAO
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

3rdamention said:
LOL, Best Buy is not selling AT&T Galaxy S3's over the counter! I dont know where you have heard that, but you definitely haven't been following either of the 2 Official Best Buy Galaxy S3 threads.
If Best Buy does have them in stock for AT&T, which is a HUGE IF, they are saying they cannot sell them because AT&T has not announced an official release date/launch date. I know, that makes not sense and is a huge lie, but that is what they are saying.
So NO, Best Buy is not selling AT&T Galaxy S3's over the counter.
Click to expand...
Click to collapse
Bull because I bought mine last Thursday at Best Buy without a pre order. Lafayette LA store.

LordGeek said:
Thank you .. LMAO
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2
Click to expand...
Click to collapse
It would be nice if at&t LTE could run in 20MHz of spectrum everywhere... but it can't. 49Mbps is far few and inbetween for at&t LTE
From my T-Mobile Galaxy S III in HD

T-mobile
Sent from my SGH-T999 using xda app-developers app

heygrl said:
It would be nice if at&t LTE could run in 20MHz of spectrum everywhere... but it can't. 49Mbps is far few and inbetween for at&t LTE
From my T-Mobile Galaxy S III in HD
Click to expand...
Click to collapse
You're right, I normally hit just 40 mbit down all over Fort Worth, including downtown.
Sent from my AT&T Galaxy S III

Why do I only get like low 20s with tmo and high 40 s with AT&T then lol horrible indeed......
Sent from my SGH-T999 using xda premium

20 mbs Down is fast enough... Specially if your are paying 50 a months like I am
Sent from my SGH-T999 using XDA Premium HD app

Screaming Ball Sweat said:
So there's s3 at T-Mobile but not att? Is it worth going to T-Mobile from.att?
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
Tmo unlocked will work for sure with att hspa +, it's unknown if they can make that happen with the Att version.
Sent from my SGH-T999 using xda app-developers app

murdermonkey9000 said:
Tmo unlocked will work for sure with att hspa +, it's unknown if they can make that happen with the Att version.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
It will not work with att version
Sent from my SAMSUNG-SGH-I747 using xda premium

At&t galaxy s3 to T-Mobile help

I got my unlocked s3 so I can use it on T-Mobile and hate edge so I was wondering if flashing the blaze modem would allow me to get 4g like the at&t galaxy note did.
Sent from my Nexus 7 using Tapatalk 2

Blaze is a .gs2, it would probably brick. I wouldn't risk it. If anything I'd try the t-mobile .gs3 radio.
Sent from my GT-I9300 using xda app-developers app

I need to know if someone has done this and gotten it to work the tmo gs3 modem if the blaze doesnt
from my Nexus 7 using Tapatalk 2

horr1blek1tten said:
I got my unlocked s3 so I can use it on T-Mobile and hate edge so I was wondering if flashing the blaze modem would allow me to get 4g like the at&t galaxy note did.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
I been thinking...instead of messing with all that and end up with a brick, why just not sell it on ebay and buy an actual Tmobile one or maybe trade with someone willing to. I would look at the selling price for an AT&T GS3 on ebay and how much would a Tmobile run and if it's not that much difference then pay the difference than end up with a possible brick. Plus I have read some forums where if you flash some things that are not meant for your phone you can even mess up the IME on your phone with no way to flash it back at the moment until someone comes up with a solution for it.

Not trying to be a jerk. Just a friendly reminder that this is not development related and needs to be in general or QA. I would repost there and report your thread to a moderator before the pitch forks come out.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

When I put my friends note to t mobile it was the modem you had to flash , if your set on doing it , read a bunch on ways to do the note WITHOUT a custom Rom then find the same files you use in that ( the modem and if I remember right there was one other thing ) then go to the t mobile section in the sgs 3 thread and ask for help finding those files , but do a lot of reading first cause it would be a shame to brick your awesome phone
Sent from my SAMSUNG-SGH-I747 using xda premium

lessthanzach said:
Not trying to be a jerk. Just a friendly reminder that this is not development related and needs to be in general or QA. I would repost there and report your thread to a moderator before the pitch forks come out.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
I thought this was development?
Sent from my HTC_Amaze_4G using Tapatalk 2

I'm also interested in getting HSPA+ 21.1 speeds on my unlocked AT&T GS3 on my tmobile network...any suggestions?

Jonnyredcorn said:
I'm also interested in getting HSPA+ 21.1 speeds on my unlocked AT&T GS3 on my tmobile network...any suggestions?
Click to expand...
Click to collapse
buy the t-mobile version. it doesn't work hardware not supported

im looking into this as well, i had the att note and flashed the tmobile modem worked like a charm so now im looking to do same with s3. if i find anything ill let you know

I don't thonk it will work at all. Att's S3 is LTE, correct. Tmobiles is not. Two different hw radios used.
If you do try it please post your results for others!
Sent from my SGH-T999 using xda app-developers app

If a solution for this is found I'll definitely be buying a red GS3 soon.

Classick206 said:
If a solution for this is found I'll definitely be buying a red GS3 soon.
Click to expand...
Click to collapse
I seriously wouldnt count on it. The two networks run on different technologies. Im pretty sure the hw is different due to this.
Sent from my SGH-T999 using xda app-developers app

Have you guys tried the radios in the dev section by wildchld? I'm not sure it will work either but maybe worth a try. It has a script that backs up current radio and you can revert back. Atleast on T-Mobile s3 it does. Just need to reflash the restore zip to go back to previous radio. Again try at your own risk. There's a huge chance you can brick your device.
http://forum.xda-developers.com/showthread.php?p=30355162
Sent from my SGH-T999 using Tapatalk 2

Tmobile is reframing the network. Soon after this year att iphones will get 3g 4g from tmobile.just wait for.it
Sent from my SGH-T999 using xda app-developers app

DocHoliday77 said:
I don't thonk it will work at all. Att's S3 is LTE, correct. Tmobiles is not. Two different hw radios used.
If you do try it please post your results for others!
I don't think it matters if the Gs3 from T-Mobile doesn't have LTE, I used to have my Galaxy s2 skyrocket with LTE running on T-Mobile 3G/4G off a GS2 Hercules Modem.
Sent from my Samsung Galaxy S3 using XDA Premium HD app
Click to expand...
Click to collapse

Then by all means, give it a shot. I have no problem being proven wrong on stuff like this!
Just remember that was a different phone. And tmobiles radio Im pretty sure was confirmed to NOT support LTE. So they are different.
I'm definately looking forward to hearing someones results after trying! Just do some research on the two radios, and make sure the sw modem is on the same partition for each phone. (I think it will be. But if its not you could end up with serious problems)
Good luck to whomever tries it!
Sent from my SGH-T999 using xda app-developers app

Probably won't, the T-Mobile phone is pentaband so it will run 3/4G on AT&T, but their version isn't. Try it though.
Sent from my SGH-T999 using Tapatalk 2

jason4962 said:
Tmobile is reframing the network. Soon after this year att iphones will get 3g 4g from tmobile.just wait for.it
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
T-Mobile doesn't have 4G. The iPhone will get HSPA.
Sent from my SGH-T999

joshnichols189 said:
T-Mobile doesn't have 4G. The iPhone will get HSPA.
Sent from my SGH-T999
Click to expand...
Click to collapse
Not yet they don't. But as he said tmobile is refarming their entire network in preparation for LTE rollout next year.
Sent from my SGH-T999 using xda app-developers app

I'm hoping you fellas will help me out here.

I'm buying an unlocked T-mobile Galaxy s3 from a really nice guy. I'm on AT&T, and would like to A) confirm it will work on HSPA+, and B) I would like to know how to go about setting it up on the Medianet plan.

Thremix said:
I'm buying an unlocked T-mobile Galaxy s3 from a really nice guy. I'm on AT&T, and would like to A) confirm it will work on HSPA+, and B) I would like to know how to go about setting it up on the Medianet plan.
Click to expand...
Click to collapse
Someone may correct me but I don't think HSPA+ will work on ATT. They use different frequencies. If you had the international SGS3, HSPA+ would work on ATT.

OK thank you, I'll pass on the GS3, I'll just keep my iphone

It works. T-Mobile s3 has the frequencies needed. My s3 is T-Mobile unlocked and using it with at&t.
Sent from my SGH-T999 using Tapatalk 2

mustk1ll20 said:
It works. T-Mobile s3 has the frequencies needed. My s3 is T-Mobile unlocked and using it with at&t.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
+1. The T999 supports 850/1700/1900/2100 for HSPA+. Therefore it will work on Atts H+. I use both T-Mobile and straight talk on my t999.
Sent from my SGH-T999 using Tapatalk 2

babymatteo said:
+1. The T999 supports 850/1700/1900/2100 for HSPA+. Therefore it will work on Atts H+. I use both T-Mobile and straight talk on my t999.
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
awesome! the phone comes unlocked already, any idea on how to get it going on medianet?

No one?

Thremix said:
No one?
Click to expand...
Click to collapse
I assume that is something to do with at&t if so, you would have a better chance asking there.

T-Mobile / Simple Mobile / Galaxy S3 ?

Until recently I have been with Sprint. And I am located in South Florida.
I am considering going with Simple Mobile as I'm told that T-Mobile has one of the best data speeds in this area. And I want to get a Galaxy S3 as the phone to use with this service.
Can anyone here advise as to whether this would work with Simple Mobile (I called them but they won't say anything only that they don't don't support it - meaning they don't sell it so don't bother them), at what speeds?
I also assume that I must get the T-Mobile version of this phone. That seems quite difficult unless I want to pay a big premium to T-Mobile, who charges much more than say AT&T for their version. So if anyone has any suggestions where I can get one (I would prefer a store, not eBay)?
Thanks

try the xda marketplace
edit: nvm just saw you dont have enough posts.

I read that the Sprint variant of the S3 would work on T-Mobile. You just have to unlock the phone I believe.
Sent from my S3

I remember negri sells the phone for $599 unlocked. That's the cheapest I've seen for the TMobile version. It's not cheaper by much but it's unlocked and you may save on taxes.
http://negrielectronics.com/catalogsearch/result/?q=t999#.UDfVdr3n_Fo
Sent from my SPH-L710 using Tapatalk 2

AttachedSilver said:
I read that the Sprint variant of the S3 would work on T-Mobile. You just have to unlock the phone I believe.
Sent from my S3
Click to expand...
Click to collapse
Sprint is cdma and T-Mobile is GSM. How are you going to stick a sim card in that sprint phone?
Sent from my SPH-D710 using xda app-developers app

My wife is using it on Simple Mobile. It works great.

Simple Mobile is a Mvno of t-mobile so you don't need to have an unlocked T999. Just change the apn. A's far as speeds. I live in Central Florida and I get the same speeds as t-mobile. I recommended. As far as where to buy the phone. I went to t-mobile and paid $599 for it. Haven't really seen it cheaper.
Sent from my SGH-T999 using XDA Premium HD app

brooksyx said:
Sprint is cdma and T-Mobile is GSM. How are you going to stick a sim card in that sprint phone?
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
It's a world phone, my friends HTC Rezound is on Verizon which is CDMA but works on ATT
Sent from my S3

AttachedSilver said:
It's a world phone, my friends HTC Rezound is on Verizon which is CDMA but works on ATT
Sent from my S3
Click to expand...
Click to collapse
The Sprint version does not have the AWS bands that T-Mobile requires.

joshnichols189 said:
The Sprint version does not have the AWS bands that T-Mobile requires.
Click to expand...
Click to collapse
Not to mention the Sprint sim slot is sealed and inaccessible.

AttachedSilver said:
It's a world phone, my friends HTC Rezound is on Verizon which is CDMA but works on ATT
Sent from my S3
Click to expand...
Click to collapse
You didn't answer my question, how are you going to put a sim card in it. The sprint galaxy siii does not have a sim slot...
Sent from my SPH-D710 using xda app-developers app

Also for Data?
Will it work for all the difference data protocols, and 2G, 3G, 4G?
AttachedSilver said:
I read that the Sprint variant of the S3 would work on T-Mobile. You just have to unlock the phone I believe.
Sent from my S3
Click to expand...
Click to collapse

Which phone is she using?
What plan (40, 50, 60) does she have? What data speeds is she getting?
tengtengvn said:
My wife is using it on Simple Mobile. It works great.
Click to expand...
Click to collapse

sun365 said:
Will it work for all the difference data protocols, and 2G, 3G, 4G?
Click to expand...
Click to collapse
No. It doesn't have the AWS bands that T-Mobile requires. And they don't have "4G".
Sent from my SGH-T999

brooksyx said:
You didn't answer my question, how are you going to put a sim card in it. The sprint galaxy siii does not have a sim slot...
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
It does have a sim slot but it's not user accessible.
It's hidden behind the plastic under the battery.
Sprint has taken this approach with all there LTE devices.
The only exception may be the Photon Q since it's touted as being a global device.

five40 said:
It does have a sim slot but it's not user accessible.
It's hidden behind the plastic under the battery.
Sprint has taken this approach with all there LTE devices.
The only exception may be the Photon Q since it's touted as being a global device.
Click to expand...
Click to collapse
There is no sim slot. There is an embedded lte chip in there but no slot.
Sent from my SPH-L710 using Tapatalk 2

tengtengvn said:
My wife is using it on Simple Mobile. It works great.
Click to expand...
Click to collapse
So she did get 4G from simple mobile or only edge speed?
Also did she get MMS problem? I saw someone open a thread says he have MMS issue. (http://forum.xda-developers.com/showthread.php?t=1791451)