yashsingh1/xdaforums huggingface dataset:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
Because this is partially cross flashing the device it is not that cut and dried.

You will always need i747 bootloader and modem. (This one here is an i747 modem for tmobile.)

I choose to keep a i747 twrp recovery . It helps prevent flashing wrong stuff but it also keeps from flashing tmobile stuff sometimes.

The rom and kernel is fine to flash tmobile. In fact it is the only way to get tmobile wifi calling and messaging.

Using tmobile twrp can make flashing roms easier but extra caution is needed not to do a wrong bootloader.

Removing the assert checks from the rom will allow installing T-Mobile roms on your i747 with i747 recovery.

With cm stuff it is usually best to update and install cm then flash modem and csc from here.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
Really I'm being ridiculous? If it's possible then you do it.

I ported radios for the droid 3 to work on gsm as well as the skyrocket/note etc. I know what I'm doing.

I posted a link earlier to run commands on your phone to verify if it even has 1700 bands. I had the One X and it had the same issue as the ATT GS3 with it lacking the 1700 band. Like I said maybe it was just mine, possibly yours has it, run the damn command and find out yourself.

Considering if the hardware is the same & the fact you can flash tmobile roms on the att model, it doesn't seem to be a firmware issue. The radios technically should be interchangable. Furthermore, the radio that I posted was a modified modem file it wouldn't flash any other files this is how the hack worked for the skyrocket and the note. This is the safest and most stable way to port radios across devices.

Clearly I put a lot of time and effort into trying to get this to work on the ATT GS3 and I am saying this again run the commands and find out if you even have the 1700 bands, and if it does then flash the modified t-mobile radio it should work. If it doesn't have the 1700 band then obviously it will never work, period.

The One X from rogers has the 1700 band but the ATT one does not, likewise my theory is that is the same thing for the ATT variant of the S3 I have no proof or documentation other than the codes which can tell you if your device has the band.

If you can magically activate hardware that is not there let me know as that seems to be the solution.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] ysr84:
IMEI

Again... i believe 23 is correct the hardware is not there to support i have confirmed from developers who work on these phones... it sucks but that is the truth....
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Nexii:
The solution is really quite simple you guys.... you see... get the right device for your carrier, there is reason why each device is on each carrier because of hardware.

yes you can unlock the device, and yes a AT&T device will pick up T-Mobile's EDGE signal because that band is supported by the both devices, but I'm pretty sure you are not going to get any other type of signal.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] phzi:
tspx23: those "commands" will check if the device IS supporting aws wcdma, not if it CAN support aws wcdma.

Yeesh.

As for myself doing it, I don't have the time to investigate properly right now (something nobody has done yet). If the bounty gets large enough I will probably look into it.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
.... your saying the same thing and fyi a rogers one x will not work out of the box on tmobile even though it comes up as supporting aws cdma with those particular commands. it needs a radio to be flashed over to enable it.

i have placed a modified tmobile radio in the thread already and due to lack of hardware it seems that most att s3 does not work with it. if it had the same hardware it should have worked no problem. i was running a t-mobile rom when i flashed it and although everything else functioned correctly the radio failed to pick it up. the tmobile one is running a different version of the cpu.

and take a look at the radio lol if indeed the phones are 100% identical then a restore of the t-mobile rom (including radio files) would work, but it doesn't. and feel free to use my modified radio.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Getz2oo3:
Would it be safe to say that this bounty will never happen?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] phzi:
Nope. There is no real evidence that aws hardware is missing. Just done about kiddies re-writing a partition or image and then declaring it impossible because it didn't work for them.

Like I said, if the bounty gets bigger then I will look into it, and won't give up unless I can show that the hardware would require modification.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SaHiLzZ:
How big do you need it to be?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] M0D1441:
Has anyone flashed a radio for a different device?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] phzi:
If you took a few moments to read, you would see that people have flashed the modem partition from other devices, and they do not function.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] M0D1441:
Sh!t..rocket...

:(

I used my sh!trocket on T-Mobile simply by flashing a T-Mobile modem or Blaze modem, it was actually quite decent
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] clenh:
I've check both Rogers I747m and the Mobilicity t999v they both run on the msm8960 modem. I think we need to find someway to decode the modem file for the settings and make it a universal modified modem file.

Sent from my SGH-T999V
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dLo GSR:
all you are saying is a whole lotta 'nothin considering you haven't done **** to substantiate what you're saying, while tspx23 has been actively trying to do something about it.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] synpax:
I can give you a reason, but it's complicated. And it may be due to me already making a mistake (or two of them) and trying to remedy that error.

Still, I have a reason.

I will chip in $20.65
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] alus415:
My reason is simple , I wanted the S3 but didn't want a contract so had to buy one , well buying a Tmobile phone off someone is too dangerous right now (you can get scammed) so only option was the ATT version and im sure like many of us thought it has the same chip so should support tmobile 3g+.

I'm still hoping that it's all encoded in the hardware and someone can unlock .
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
you shouldn't have an issue if you buy a brand new never used one. i sold my att one and got a tmobile one sealed and it comes up as registed on my account new. i've also called in about an issue and they exchange the phone for me no problem.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] ysr84:
I know that people are working on it .. however many have confirmed that this will not work.... Anyhow I am willing to put a total reward of $250 from my end if someone is able to do the mod... (similar to S2 i727 & Gnote i717)

Thanks,,,,
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SladeNoctis:
Lets make this happen bumping up :)
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] smartguy044:
So tsp I know you are the man when it comes to these modems....with that said I did the commands you linked to and according to that if T-Mobile 310260 comes up you have the necessary stuff for T-Mobile radio correct?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
that sounds right, i'm pretty sure your device has AWS support in that case -- if it does that'd be crazy, so far i've only known of one s4 device on att/rogers that has that band.

and btw sick tw/aosp hybrid rom lol i was in the process of removing the touchwiz from my phone and then your rom popped up!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] iwasaperson:
I think removing the checks every nightly will be a bit tedious. Also, I'm giving this to a less savvy person than I. He has no problem flashing a ROM, but editing it is beyond his capabilities. And I don't feel like doing it myself every night.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] VQ30DE:
Looking at the markets where TMo has refarmed, it seems to be all the major cities. So unless you *don't* live in one of these major metro areas, doing this mod isn't really necessary to get LTE and HSPA+. Agree or disagree?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
Than pick a different rom and stick with it. Lots of good roms and do you really need to update every night?

Just my opinion. Call me crazy but I'm still running stockorama v2 on my i747. It is very stable and has all the features I need. It has made my i747 a great T-Mobile phone and will probably remain on it.

If they need the latest cm every night they probably shouldn't use the i747 or use att version of the rom because it won't have the advantage of wifi calling and messaging anyway.

---------- Post added at 11:16 AM ---------- Previous post was at 11:12 AM ----------

This is accurate. I'm near phoenix so the whole area is refarmed. Lte and 4g hspa most places. I use the latest i747 modem and bootloader and use nvbackup method for when I go out of town.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] doctadocta:
att ROMs
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
You don't have to use att roms with the i747

The whole point of doing this mod is to use the phone with tmobile. Using tmobile roms can help take full advantage of wifi calling and messaging. You just can't use tmobile modems or bootloaders unless it it this specific one from this mod made for the i747.

Using att roms might be easier to install but then your phone less like tmobile and you won't have wifi calling and messaging. Newer cm roms have a hard time because they check for newer version bootloaders and modems.

You should be able to odin the csc and modem from this mod over most any rom and have 1700 enabled.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
Thanks for this. I just unlocked and stuck my sim card in and I'm pretty sure I'm getting solid lte for T-Mobile. You guys are awesome.

http://www.speedtest.net/my-result/a/629358674
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
AT&T LTE devices works out of the box on T-Mobile LTE. It's "4G" (HSPA+) that doesn't in non-refarmed areas.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
This isn't always true. My skyrocket, no matter which modem I used, will only get edge. I am not in refarmed area, so I understand that, however, even when going to LTE areas, it remains on edge.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
This modem was for the i747 only.

As for why the skyrocket won't do lte, if it is a lte device and has aws band lte capability like the i747 you may need the proper apn. fast.tmobile.com . I have also heard of needing a newer sim card.

Tmobile lte works using 1700&2100 mhz together. The same way as it does hspa.(except in 1900band refarmed)

One for upload and one for download.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] VQ30DE:
Glad to hear it. I finally got my T-Mo SIM and it worked no prob. Here in Portland I get LTE (weak signal but it tests at 15Mbps, which is fast enough for me) in my house, and good LTE and HSPA+ elsewhere. Occasionally I've seen it on Edge but it doesn't stay there long. We'll see what happens next time I leave the city.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
I was just using my skyrocket as an example of what you stated above. I tried all available modems from the rocket and Hercules and different apns. Nothing gives it lte. In fact only the stock att modem for 4.1.2 gave it any service at all. If it was my phone, I wouldn't quit til I got it figured out. It is my 13year old sons with the 30$ monthly plan (1500 talk or text, 30mb data) so I'm actually not upset that he can't sit on his phone in school when he should be paying attention. ;) as for my s3, I opted for the att subdivision of AIO wireless. Speeds are fast enough for me (4mbps in my hometown, 8mbps in LTE areas) and I'm happy with it since I didn't have to do this mod and risk messing it up. Lol
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
Darn my flasaholic tendencies. Is AWS faster than just the refarmed 1900 and LTE? I'm getting pretty solid speeds without doing this but would I get speeds closer to 42 megs versus now I seem to max out in the 20's? Also it seems this flash will not stick if I reboot my phone? Would I always have to Odin it or will mobile Odin work to flash the two files modem and that other one. And it seems I could then flash say a 4.3.1 ROM but that takes an updated boot loader, does that make it incompatible with this hack? I have a AT&T i747 on T-Mobile. Thanks for any replies in advance.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
LTE is usually faster than aws hspa or 1900 hspa. 1900 for me in phoenix is as fast as 1700/2100 aws. If you live in refarmed area, and running a touch wiz based rom I recommend using nvbackup method for when you are out of town.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
I'm on this ROM in the pic and would like to flash this. Is that even a factor? Will I Stoll be able to change ROMs and whatnot after I flash this? And also. Can I use mobile Odin to flash this?

Sent from my AT&T S3 on T-Mobile 4G
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
Well i went ahead and flashed just the modem and the csc file using mobile odin and everything is perfect. Way easier than i thought.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
Did you do it over your existing ROM or did you flash back to stock and stay on that? Also, does anyone think this will work on the 4.3 leaked ROM ?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
I flashed it over my existing ROM. Lost no data and I'm on a 4.3.1 ROM. If u look at the two pics the baseband has changed and everything is fine.

Sent from my AT&T S3 on T-Mobile 4G
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
I also notice after doing this that I'm only getting G in places where I used to get EDGE.

Sent from my AT&T S3 on T-Mobile 4G
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] solomon711:
same issue only g or 4g no e or lte even though there have been sightings in my neighborhood ive tried several modems which give me edge 4g until i reboot then edge only
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
Yes I only get 4G LTE. Or 4G or just G. I don't get edge anymore.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Chr0nicDreamz:
I've never even used this mod. I recently switched to tmo. I'm using an aosp build and I pick up and can use all bands. Edge ,g, 3g , h, h+, and 4GLTE with no issues
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
Most likely because u are in a refarmed area....but as soon as u leave that area u will only get edge. With this mod. It enables 3g and 4g in non refarmed areas.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] LexApp:
Mine is only on 4G and there's no option in settings to change it to 2G/3G/4G. Please which aosp build are you using? Can you point me to the link.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Chr0nicDreamz:
I've been out of the area. Actually out of the state and same thing. Could be whole area was redone. Not sure how coincidental that is.

---------- Post added at 12:49 PM ---------- Previous post was at 12:49 PM ----------

I'm using slimbean 4.3.1 stable build 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
If I'm not mistaken a lot of major cities have been refarmed. Before I used this mod.....as soon as I left saint Louis I was just on edge and that was it. But now I get 3g and 4g and 4gLTE
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Chr0nicDreamz:
My other s3 only gets edge and LTE. Its on a stock rooted tw rom
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
I'm on an aocp ROM and never got 4g outside of stl
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
I had flashed this to the 4.3 leak but it did not work. It changed baseband in settings but I only got edge when I left my area which is refarmed. Any one have any tips? Thanks
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] TheStart:
I want to try this without rooting, but will I be able to return it to stock if I want too? Also, will there be any problems because I am not rooted?

Edit: Also, what is the SW delivery in the download files? Do I have to do something with that?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
You should be able to as you can simply Odin back to stock and even Triangle Away if it's for warranty reasons. I used the third link. Just literally follow the directions given and you'll be on a stock tmobile 4.04. You can stay on that or you can also Odin a custom recovery (stickies here are your friend) and then flash a custom ROM. There are plenty to choose from, I.e. I'm currently running S3RX which is my personal favorite stock as it has the reliability and battery life I need. It really depends on what you want. Once you've flashed it though in areas where you normally got edge you'll have 4g hspa. In one town where I used to get edge I now get about 6-7 megs down which is more than sufficient for pandora and voip. If you ever want stock just read a tutorial on using Odin to flash stock.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] TheStart:
ok, thanks for the help!

After I do the first odin to get the AWS working, do you think i'll be able to just upgrade my firmware by using the new cyanogenmod app that was released in the playstore?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
I've never used that but I'm pretty sure you need to be rooted for that. There are lots of great tutorials in the stickies on rooting and flashing a ROM. I think as long as you don't have to install a new modem it should work just fine.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
Would any of the wizards out there have any idea if this method can be adapted to work with the 4.3 builds coming out and soon to come? I'd love to update but having full T-Mobile spectrum makes such a difference for me as I travel for work and having solid 4g/hspa+ makes such a huge difference in the usability of this phone. Thanks
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bbrennan:
I have been working with it and working with it but havent come to a solution yet
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] david7598:
I have a question.....every time I flash ROMs...do I have to reflash this.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bbrennan:
No, unless you flash anything 4.3 touchwiz, as you must use the modem that comes with it
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bbrennan:
wrong thread
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] yusoweird:
:laugh: A software guy trying to to "prove" that hardware doesn't exist simply running software. Just came to rub it in ;D :laugh: It proves you are not a hardware guy.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
The T999 does have a slightly different chipset, which doesn't support LTE. That's why the T999L (S3 LTE) was released on T-Mobile, which does. However, in general, almost all modern chipsets can support AWS (1700/2100 together) on a hardware level:

1. AT&T doesn't ask manufacturers (Samsung/HTC/LG/etc) to enable frequencies it doesn't use for HSPA+ ("4G", which is really 3G), either because they're charged extra since most carriers around the world don't use it, or...

2. AT&T purposely asks manufacturers to disable AWS for HSPA+, since it's automatically enabled by the chipset, but only its competitors use it (AT&T doesn't use AWS for HSPA+).

Devices that can support a certain frequency on one protocol (e.g. LTE) can support it on another (e.g. HSPA+). AT&T devices are capable of AWS LTE, not because AT&T is nice and wants their devices to work on T-Mobile LTE, but because AT&T in very few areas uses AWS LTE instead of 700 MHz. In theory, the device should [if un-tampered with my AT&T] work fine on AWS HSPA+. I mean, look at the T-Mobile Galaxy S3 LTE. It's literally just the AT&T S3 with AWS enabled for HSPA+. Same thing with the S4 and Note 2; you can actually enable AWS on those easier than on the S3 (Note 2 works but isn't super stable, S4 AWS mod is completely stable).

It costs Samsung and manufacturers to create different versions on a hardware level, so they just block out unwanted/unused frequencies on a software level (modem). Even computer manufacturers like Dell use it; if you order a desktop computer with a 750GB HDD, sometimes what they'll do is take a 1TB and format it in a way as to only make 750GB HDD available (no, I'm not joking). Why? Because that's what you ordered, and it's sometimes cheaper to not have to buy a ton of different hard drives to put into peoples' computers. Less variations = Less cost of production. Get it?

The modems in the devices are called Software Defined Radios, and are exactly what they sound like.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] HC Traktor:
att 4g freqs gone

Hi guys. I use at&t now, but thinking of switching to T-Mobile... I flashed my s3 with files from this thread and T-Mobile Sim works fine. I see 4g and 4g LTE all the time (Brooklyn and Manhattan) however when I insert at&t Sim card 4g and LTE is gone completely. I can make voice calls but no internet connection whatsoever. Is this a normal outcome or did I make a mistake during flashing?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
Did you set the APN back to AT&T when you put the AT&T SIM back in the phone?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] HC Traktor:
No I did not. Can you please let me know how to do that? What is APN?

Thx
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] HC Traktor:
Eclipses onalfRu

I set up AT&T APN (went to look up settings to a store) and 4G LTE works again on Att network. thanks for your help!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tjtenor4:
Hey guys - thanks so much to everyone who's contributed in this thread. Just a (hopefully) quick question: what stock T-Mobile ROMs (if any) will work with this mod? Anything for T999, or T999L, or something else? Thanks so much!!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] HC Traktor:
root?

I reflashed my AT&T phone using T-mobile files from this thread, t-mobile works fine, I get 4g and lte. The question is how do I root my phone now? CF-root via odin bricked the phone. Please help

Edit: I also tried rooting using SG3 ToolKit V7.0.0. as At&t 4.0.4 and as t-mobile 4.0.4, rooting goes through but then wi-fi stops working (can't turn it on in both cases). Any ideas greatly appreciated.

Happy Thanksgiving!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bit1:
I used Odin to then flash a custom recovery and then I flashed a 4.1.2 ROM that was already rooted.