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

Can i get Tmobile 3G/4G working on Unlocked ATT

I got a ATT S3 a Gift but i am on tmobile network, i was wondering if i can unlock it and use it Tmobile Nework along with Tmobile 4G, Is it possible if i flash the tmobile radios from Galaxy Note forum ?

vikramdhani said:
I got a ATT S3 a Gift but i am on tmobile network, i was wondering if i can unlock it and use it Tmobile Nework along with Tmobile 4G, Is it possible if i flash the tmobile radios from Galaxy Note forum ?
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Click to collapse
No. Only edge network will work. 3g and 4g work on completely different spectrum and radio frequency
Sent from my SCH-I535 using xda app-developers app

If that was true the galaxy note from att wouldn't get T-Mobile 4 g which it does when flashing a blaze 4g modem I also want to know if this will work on the att s3
Sent from my Nexus 7 using Tapatalk 2

Yes it does I have it working on my father in laws note
Sent from my SCH-I535 using xda app-developers app

That may be true about the Note 2, but an ATT S3 does not have the T-Mobile 3/4G frequencies.

GTWalling said:
That may be true about the Note 2, but an ATT S3 does not have the T-Mobile 3/4G frequencies.
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Click to collapse
Yes this guys right. Take a look for yourself:
ATT Galaxy Note Specs
T-Mobile Galaxy S3 Specs
ATT Galaxy S3 Specs
Notice how the Note and the T-Mobile Galaxy S3 have that 1700 Mhz frequency? Thats what T-Mobile broadcasts their 3G/4G spectrum on. If the phone doesnt have those frequencies, then it wont work no matter what you do.

horr1blek1tten said:
If that was true the galaxy note from att wouldn't get T-Mobile 4 g which it does when flashing a blaze 4g modem I also want to know if this will work on the att s3
Sent from my Nexus 7 using Tapatalk 2
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Click to collapse
That's different. It is a whole different phone with a whole different SoC.
Let's not say things that we cannot prove.

Don't shoot this guy completely down. It will get T-Mobile 3g/4g as soon as T-Mobile refarms their network.
Sent from my SGH-T999 using Tapatalk 2

Some of my friends are getting 4g on their unlock at&t s3 with tmobile
Sent from my SGH-T999 using xda premium

JUSMEJOSE said:
Some of my friends are getting 4g on their unlock at&t s3 with tmobile
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Yeah, because they live in one of the small parts of the US that uses the 1900mhz band for HSPA. It will not work everywhere else.
Sent from my SGH-T999

What about the other way? A T-Mo SGS3 on AT&T? What does that get you? I know NO LTE but what about HSPA+ ?

MisterEdF said:
What about the other way? A T-Mo SGS3 on AT&T? What does that get you? I know NO LTE but what about HSPA+ ?
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Click to collapse
Yes, HSPA+ will be fine. But as you said, no LTE.

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
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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
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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
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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.
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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
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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?
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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
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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)

[Q] moving from AT&T

Hi,
I'm thinking moving from AT&T to T-Mobile and was wondering if I can keep my unlocked Skyrocket (Galaxy SII), flash a T-Mobile rom,a modem, change the APN and be good to go.
Will I be able to get 4g?
Thanks for your help.

floppy__ said:
Hi,
I'm thinking moving from AT&T to T-Mobile and was wondering if I can keep my unlocked Skyrocket (Galaxy SII), flash a T-Mobile rom,a modem, change the APN and be good to go.
Will I be able to get 4g?
Thanks for your help.
Click to expand...
Click to collapse
I would think being a new customer to T-mobile that you might be able to get the T989 for free....but if not...check out this thread http://forum.xda-developers.com/showthread.php?t=1507825
Sent from my SGH-I727 using xda premium

EQ2192012 said:
I would think being a new customer to T-mobile that you might be able to get the T989 for free....but if not...check out this thread http://forum.xda-developers.com/showthread.php?t=1507825
Sent from my SGH-I727 using xda premium
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What he said but I would upgrade to a S3 or S4 or even the HTC One while your at it.
Sent from my SGH-T989 using Tapatalk 2

corwest said:
What he said but I would upgrade to a S3 or S4 or even the HTC One while your at it.
Sent from my SGH-T989 using Tapatalk 2
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Click to collapse
What he said to...lol..not thinking today!
Sent from my SGH-I727 using xda premium

If you're somewhere that tmobile has 1900 MHz service, you should be fine. Why lock in to another contract or payment plan if you don't have to?
Sent from my Nexus 7 using Tapatalk 4 Beta

floppy__ said:
Hi,
I'm thinking moving from AT&T to T-Mobile and was wondering if I can keep my unlocked Skyrocket (Galaxy SII), flash a T-Mobile rom,a modem, change the APN and be good to go.
Will I be able to get 4g?
Click to expand...
Click to collapse
You still have to run a ROM from the skyrocket forum. You can use T-Mo modems or skyrocket modems
I use the T989 on At&t and get better performance with a T-Mo modem

tronmech said:
If you're somewhere that tmobile has 1900 MHz service, you should be fine. Why lock in to another contract or payment plan if you don't have to?
Sent from my Nexus 7 using Tapatalk 4 Beta
Click to expand...
Click to collapse
Going to T-Mobile with their new "non contract" plan will save me $50/month without signing for 2 years, I think it's a really good saving

EQ2192012 said:
I would think being a new customer to T-mobile that you might be able to get the T989 for free
Click to expand...
Click to collapse
'Uncarrier' plans, remember? There are no free phones anymore (though there are ones with no down payments, but the SGS2 doesn't qualify). Even the absolute cheapest phones must be fully paid for now as shown on their website.
To the OP, I highly recommend getting a new phone. The i777 is good, but it lacks the 1700 band, so you won't have 3G. Choose whatever phone you like, though, personally, I intend to get the HTC One myself as soon as I can.

4G data on an ATT GS3

Hi
So long story short, my Tmo GS3 got stolen at my work :/
So my mom gave me her ATT GS3 cus she was up for an upgrade,
i been reading its possible to get 4G on an ATT GS3 but so far no luck,
i know i have the right APN cus i copied the one from my Nex4 to my GS3, i set the network to manual and choose Tmo, but still all i get is Edge.
Does it have to do something with the way i unlocked the phone?
I been reading it has to be factory unlock and i unlocked mine by dialing *#197328640# and doing the required steps.
Can anyone help me with this?

Maybe you should try posting in the ATT S3 forums? I'm pretty sure that most people here have the TMO variant, while you are looking for tweaking of the ATT variant.
Sent from my SGH-T999 using Tapatalk 2

klin1344 said:
Maybe you should try posting in the ATT S3 forums? I'm pretty sure that most people here have the TMO variant, while you are looking for tweaking of the ATT variant.
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hahahah good idea XD
thanks bro

Also if you havent already tryed flash the tmobile modem and ur att gs3 is unlocked?
Sent from my SGH-T999 using xda app-developers app

deron37129 said:
Also if you havent already tryed flash the tmobile modem and ur att gs3 is unlocked?
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Nop my galaxy is not rooted. And yes it is unlocked but with the method i said not with unlock code.
Sent from my Nexus 4 using xda app-developers app

Don't flash a T-Mobile modem, it will brick. T-Mobile and AT&T use different frequencies for hspa+ in most places, and the AT&T version doesn't have the hardware to pick up the most used T-Mobile frequency I believe. So you're probably stuck with edge
Sent from my SGH-T999 using Tapatalk 2

I'm stuck on edge too buddy....
orphan22 said:
Hi
So long story short, my Tmo GS3 got stolen at my work :/
So my mom gave me her ATT GS3 cus she was up for an upgrade,
i been reading its possible to get 4G on an ATT GS3 but so far no luck,
i know i have the right APN cus i copied the one from my Nex4 to my GS3, i set the network to manual and choose Tmo, but still all i get is Edge.
Does it have to do something with the way i unlocked the phone?
I been reading it has to be factory unlock and i unlocked mine by dialing *#197328640# and doing the required steps.
Can anyone help me with this?
Click to expand...
Click to collapse
You ARE stuck on edge.... I know it sucks. unless you are in a refarming area http://www.airportal.de/ , (major cities) your AT&T S3 1900/2100Mhz high speed data (4G) band will not work on T-Mobile's 1700/2100Mhz networks. I would sell it on e-bay or craigslist and got your T-mobile S3 again. or get the T-Mobile S4 after you sell your att S3 :cyclops: