New (to me) AT&T S3 on TMobile - T-Mobile, Samsung Galaxy SIII

Hey guys, I just got a S3 off of craigslist and have T-Mobile service but still have an AT&T ROM so mobile hotspot, nav and other features aren't working. Is there a T-Mobile RUU available or would I be better off rooting it and going with a custom ROM?

So T-Mobile Rom on an AT&T device is ok?

Like they have no problems..
Just being cautious.I'll flash and see one and update you!!
Sent from my SGH-T999 using xda app-developers app

jperry73 said:
Nah, no issues other than fixing the APN for data...
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So far I've used the "SAMSUNG GALAXY S3 UNIFIED TOOLKIT V7.0" (http://forum.xda-developers.com/showthread.php?t=1746682) to root and install CWM recovery. From recovery I successfully flashed Jelly Beans build 15 (http://forum.xda-developers.com/showthread.php?t=1973982) and so far everything appears to be working well except for 4g. In the notification area I have "G" and then "3G" but no 4G even in areas where I could pick it up before flashing.
This is an AT&T S3 (i-747) and I used the i-747 image to root/ flash recovery via the toolkit and then flashed the Tmobile variant of Jelly Beans.

Figured it all out. Thanks to this thread I was able to successfully flash a T-Mobile i747 engineering rom (http://forum.xda-developers.com/showthread.php?t=1771021) which also flashed the modem enabling TMo frequencies. Then I was able to reroot and flash a recovery meant for a t999 so in essence my phone is no longer an i747 but a t999 but with a radio that actually supports 4g/ lte. Basically what the new S3 Tmo is launching. My Jellybeans rom which was based off of a verizon build wouldn't allow 4g so I had to replace it with Darthstalker (http://forum.xda-developers.com/showthread.php?t=2014442) which I haven't played around with too much yet but so far is awesome (native tethering works, one of my complaints about other roms). Ah 4G is nice, hit 12Mbps down... So long Sprint... So long Evo "4G"

thank you for the info! very helpful

What area are you, where you get those dl and up speeds? Thanks for the links!
itsmillertime said:
Figured it all out. Thanks to this thread I was able to successfully flash a T-Mobile i747 engineering rom (http://forum.xda-developers.com/showthread.php?t=1771021) which also flashed the modem enabling TMo frequencies. Then I was able to reroot and flash a recovery meant for a t999 so in essence my phone is no longer an i747 but a t999 but with a radio that actually supports 4g/ lte. Basically what the new S3 Tmo is launching. My Jellybeans rom which was based off of a verizon build wouldn't allow 4g so I had to replace it with Darthstalker (http://forum.xda-developers.com/showthread.php?t=2014442) which I haven't played around with too much yet but so far is awesome (native tethering works, one of my complaints about other roms). Ah 4G is nice, hit 12Mbps down... So long Sprint... So long Evo "4G"
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Related

[Q] Stock sgh t889 modem on sgh i317?

I've been using my rooted note to with tmobile for a while, and since I flashed a few roms, I've noticed that my 4g is a bit slower. Instead of flashing back to the att stock rom, I was wondering if I could flash the tmobile stock rom on it. I only ask because the att variant as the tmobile 4g band unlocked already and every rom I've downloaded is compatible with both. Virtually the same phone, so I figured this may be possible. Any ideas?
geekgreek said:
I've been using my rooted note to with tmobile for a while, and since I flashed a few roms, I've noticed that my 4g is a bit slower. Instead of flashing back to the att stock rom, I was wondering if I could flash the tmobile stock rom on it. I only ask because the att variant as the tmobile 4g band unlocked already and every rom I've downloaded is compatible with both. Virtually the same phone, so I figured this may be possible. Any ideas?
Click to expand...
Click to collapse
first flash the aws dummy zip then the tmobile rom and put in the tmobile apn settings for lte and you will be set I just put the tmobile rom on my unlocked att note 2 and I luv it highest speeds I seen so far has been like 32 dwn and 32 up thats fast considering tmobile just got lte in Dallas this month
Slabking81 said:
first flash the aws dummy zip then the tmobile rom and put in the tmobile apn settings for lte and you will be set I just put the tmobile rom on my unlocked att note 2 and I luv it highest speeds I seen so far has been like 32 dwn and 32 up thats fast considering tmobile just got lte in Dallas this month
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Click to collapse
I've already run the aws dummy. Glad to hear that the sght889 stock Rom works on i317!
geekgreek said:
I've already run the aws dummy. Glad to hear that the sght889 stock Rom works on i317!
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some of the att mods work as well I have mine underclocked at 200 and overclocked at 1920 and battery life is a1 but it works flawlessly just keep in mind all tweaks you can flash so far that I know need to be att from there threads on here so enjoy it I dont see myself going to another carrier no time soon with this being done
aws dummy zip?
Slabking81 said:
first flash the aws dummy zip then the tmobile rom and put in the tmobile apn settings for lte and you will be set I just put the tmobile rom on my unlocked att note 2 and I luv it highest speeds I seen so far has been like 32 dwn and 32 up thats fast considering tmobile just got lte in Dallas this month
Click to expand...
Click to collapse
Can you please add a link to aws dummy zip. I am new in this world. Just bought an unlocked i317 but want to use tmobile sim. While flashing tmobile rom on my i317, it fails at radio part. Would like to try this method. But I could not find aws dummy zip on the net.

Question about using ATT Rom

I have read that I can use a ATT ROM on my T-Mobile S4 and was wondering if I did so and then of course flashed a t-mobile kernel, if I would have wifi calling or not. I am not sure if that is part of the rom or not so wanted to just check.
HughesNet said:
I have read that I can use a ATT ROM on my T-Mobile S4 and was wondering if I did so and then of course flashed a t-mobile kernel, if I would have wifi calling or not. I am not sure if that is part of the rom or not so wanted to just check.
Click to expand...
Click to collapse
You can flash an AT&T ROM, but flashing a T-Mobile kernel will not enable WiFi Calling, because it is part of the ROM. Sorry.
The way u wanna do it by flashing an att rom on a tmobile s4 more than likely
wont work cause the wifi call feature is built deep into the tmobile roms... AND ALSO WORKS OF THE SIM CARD.
On the other hand You should be able to flash any tmobile rom.... on a att branded s4 and get wifi calling just keep the att kernel..
And keep att baseband.
This should be no diff for s4 because
On the att s3 you can flash tmobile 4.1.2 roms and get wifi calling
If it uses aroma installer and opts to keep kernel...then keep the kernel but continue flashing tmobile rom...
Ive used many tmobile roms in my att s3 with wifi calling.
Havent tried it with a tmo s4 on a att rom.... just make sure u backup stock att rom if all else fails.
Sent from my SGH-M919 using xda premium

Tmobile s4 ROM in att s4

Is it possible?
What I'm trying to do is to achieve the wifi calling feature in att s4
Sent from my SGH-M919
re: wifi calling AT&T phone
-greenboy- said:
Is it possible?
What I'm trying to do is to achieve the wifi calling feature in att s4
Sent from my SGH-M919
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Click to collapse
There are three prerequisites for getting wifi calling to work using an AT&T phone.
#1: Unlocked Phone
#2: Tmobile Sim card
#3: Flash a Tmobile 4.2 or 4.3 Jellybean M919 Touchwiz based custom or stock rom.
Once you have met those three requirements your AT&T phone will have wifi calling.
Good luck!
Misterjunky said:
There are three prerequisites for getting wifi calling to work using an AT&T phone.
#1: Unlocked Phone
#2: Tmobile Sim card
#3: Flash a Tmobile 4.2 or 4.3 Jellybean M919 Touchwiz based custom or stock rom.
Once you have met those three requirements your AT&T phone will have wifi calling.
Good luck!
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Just wanted to add, use the kernel and modems that are meant for AT&T even though you are running a TMobile rom.
re: modem/radio
braschlosan said:
Just wanted to add, use the kernel and modems that are meant for AT&T even though you are running a TMobile rom.
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No need to change modems, none of the cwm/twrp flashable zip file roms contains modems and
he needs to use whatever modem he already has, flashing a tmobile modem will most likely cause
signal loss since it's related to hardware and the AWS frequencies on the AT&T phone.
Get it to work?
-greenboy- said:
Is it possible?
What I'm trying to do is to achieve the wifi calling feature in att s4
Sent from my SGH-M919
Click to expand...
Click to collapse
I have an AT&T S4 myself on T-mobile now and I cannot find a combo that works. I cannot install a recovery on mine without Safestrap and while I can flash rom's with this method, I have yet to find a combo of roms and kernels where everything works. I either get a rom that will not boot at all or a I get one that will boot but no wifi whatsoever (cannot turn on Wifi). I've tried Safestrap 3.65 and 3.71 and a dozen or so roms and kernels and still no combo that works. What I can say is that 4.2 based roms at least boot.

[Q] Modem question

Ok, so I have the AT&T i747 and I unlocked it the other day to work on the T-Mobile network. I am interested in assisting with Beta testing on a 4.3 ROM for the i747 and one of the prerequisites is to flash the 4.3 modem. My question is, do I flash the 4.3 modem for the i747 or for the T-Mobile equivalent? Also, if you wouldn't mind suggesting some other things to try as far as getting a better network and wifi signal, that would be awesome. I've tried several of the "wifi enhancement" apps and the "network enhancement" apps as well as going in and verifying the apns are set for the T-Mobile network (fast.t-mobile.com), etc.
jon_yarbrough said:
Ok, so I have the AT&T i747 and I unlocked it the other day to work on the T-Mobile network. I am interested in assisting with Beta testing on a 4.3 ROM for the i747 and one of the prerequisites is to flash the 4.3 modem. My question is, do I flash the 4.3 modem for the i747 or for the T-Mobile equivalent? Also, if you wouldn't mind suggesting some other things to try as far as getting a better network and wifi signal, that would be awesome. I've tried several of the "wifi enhancement" apps and the "network enhancement" apps as well as going in and verifying the apns are set for the T-Mobile network (fast.t-mobile.com), etc.
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Click to collapse
If you are concerned with the T-Mobile network why don't you try the tread about the 1700 aws wcdma with 3g data it has a rom and stuff IIRC on page 28 designed by T-Mobile to run on an AT&T i747 it kind of converts the phone to the T999, I do know you can run T-Mobile T999 roms after that but I don't know you would be able to run 4.3?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

[Q] At&t phone on Tmobile network

A friend upgraded his phone to the note 3 and gave me his At&t note 2. I am with Tmobile. I am going to have it unlocked. I want to root it and flash a rom to it. Since its was on At&t network do I flash it with a rom from the At&t section or Tmobile section? If i am missing anything else that is required other than which section to use for rom flashing please feel free to inform me.
graycd01 said:
A friend upgraded his phone to the note 3 and gave me his At&t note 2. I am with Tmobile. I am going to have it unlocked. I want to root it and flash a rom to it. Since its was on At&t network do I flash it with a rom from the At&t section or Tmobile section? If i am missing anything else that is required other than which section to use for rom flashing please feel free to inform me.
Click to expand...
Click to collapse
You can flash just about any rom from the AT&T section because most do not flash over the modem you have installed. I believe the DN3 rom is the only exception to this rule. For AOSP based roms, you can flash any of the roms here. You may also want to check the N7105 XDA area because it has more options than the TMO Note 2 section.
Bajan will probably add more clarification here because he has a TMO and AT&T Note 2 and visits all 3 forum areas.
save some Dough!!
I have a AT&T i337 lost service then went to local cell store.. Switched to Met==PCS.. 60/month unlimited data.. Plus they are on the T-Mobile network just as good just cheaper.. I haven't been throttled at all that I can tell...
I have the ATT Note 2 and currently using it with TMo and I am getting LTE speed and HSPA+ on the reform 1900 area. You don't have to do anything with the modem as long as you have it unlocked. I have only been using ATT based rom on my phone. And everything works, MMS, data, call etc. I do encounter some issue where it hangs while pulling data (not too often) but for most part it works great. I either just have to turn the network on/off or just a restart. I do not use any of the Tmo software like visual voice mail or wifi calling (as you won't be able to use it with any of the ATT ROM).
I have a One X on T-Mobile from AT&T and so far everything is great. Just have to be in a 1900 MHZ or LTE area to get high speed data.
Sent from my HTC One XL using XDA Free mobile app
I also have the i317 on T-Mobile. I am using the latest MK6 modem for the i317. You can also optionally perform the AWS Mod to enable 4G on the 1700MHz band. Whatever you do, make sure you do not flash a modem meant for the T-Mobile Note 2 (T889) or you will end up with a brick. As was already mentioned any of the ROMs in the Development section will work for this device.
graycd01 said:
A friend upgraded his phone to the note 3 and gave me his At&t note 2. I am with Tmobile. I am going to have it unlocked. I want to root it and flash a rom to it. Since its was on At&t network do I flash it with a rom from the At&t section or Tmobile section? If i am missing anything else that is required other than which section to use for rom flashing please feel free to inform me.
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You can flash it with a rom from Tmobile Section

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