yashsingh1/xdaforums huggingface dataset:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
yes edge will work but not 4g.

Here is an extracted full t-mobile radio with modified ATT modem: http://www.mediafire.com/?d1kxqfzvocqct8u. Flash this and set your bands to pick up WCDMA.

If it does not connect to the t-mobile network or show any signal, your ATT S3 does not have the hardware. Make sure to backup before flashing !
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Goronok:
T-Mobile model is gimped hardware wise compared to all other SGS3s.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
not necessarily gimped it still has an s4 band but the version of the chip supports tmobile 4g bands. speed wise there is no real difference.

other s4 chips (sprint/verizon/att) have the LTE supported chip.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] sarim.ali:
Ok i flashed this and i screwed up my phone, its not showing signals at all. And i backed up my rom and restored my rom and that didnt help basically my phone doesnt work. Guys be careful.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
it should be able to restore if you did a nandroid. the reason why it is not showing signals is because the hardware is not capable of picking up the signal at those frequencies.

however flash this and you will pick up the signal normally. this is the 747 modem files: http://www.mediafire.com/?sy7r56hs86lz6bz
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] sarim.ali:
I tried this no luck with getting my signals back. Thanks anyways. You can see the attachment i lost my iemi.

I'm hoping this thread can bring it back to life. http://xdaforums.com/showthread.php?t=1801997.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] tspx23:
nooo don't follow that imei dissapeared for a different reason. it's not actually lost, did you try restoring it via odin? restoring via odin should always work.

the note's imei dissapears when flashing a different radio as well i'm not sure why.

regardless i will say this once again the ATT S3 IS NOT hardware supported to pick up t-mobile bands and flash at your own risk, i lost all signal when i flashed the t-mobile radio. furthermore, i only put the t-mobile modem in the zip file, which is the safest way to test out radios.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] sarim.ali:
Yea i tried that too, it gave me my baseband back, but still no signals. It seems like the imei is my only option cuz thats the only thing missing now.

Edit:

Doing the iemi thing worked im back online. thanks for the radio thing, but i wont be doing stunts like that anymore lol.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] phzi:
No... you are being ridiculous. It is entirely plausible that another part of the firmware is blocking other modems from working. Claiming it is a hardware limitation would require proof.

Again... I certainly have not seen this. I've read of several people flashing other provider's modems and saying that the device did not work. I have not seen anyone prove this is a hardware limitation... very likely because it is NOT. If the frequency is supported on another signaling protocol (such as LTE vs WCDMA), it is very possible that the antenna hardware for that frequency could be used for another signaling protocol on the same band, if it is supported by the SoC. You can find examples with a quick google search.

You sure are saying the same thing a lot... Without backing it up by anything. Show me that the SoC outputs for WCDMA are actually different and unconnected leads to a separate antenna then the SoC outputs for LTE. You sure they ARE even separate output pins... ? Hard to say that without the Qualcomm and probably Samsung tech/ISO manuals.

Well, okay... so a few people have shown FCC documents and claimed that is proof it is not impossible. Nah... that is not proof at all. All that shows is that the devices are not CERTIFIED to work on AWS 1700 3G W-CDMA. This means that in their unmodified form, they do not operate on this frequency/signaling system combination. That limitation does NOT need to be hardware to pass certification. If it can be reasonably shown that firmware restrictions preventing use on unintended frequencies exist, that would very likely be satisfactory to the FCC and similar regulatory organizations.

So pffft to the bull****ters and doubters. It is only "impossible" in firmware/software when someone provides real proof that a hardware modification is required. And even then, it may well be possible with a hardware modification if the SoC supports it (and it damn well does support it)! Only if it is unsupported in the modem as separate from the SoC is it truly "impossible" - at least, without being a ridiculous mod.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] zaky1:
Hi guy mine is I747M ( Rogers ) I just got it 3 days ago but when I looked to the service menu I found 1700 is listed under WCDMA there and the phone is set on auto. is it a good signe that it can work on WCDMA band or no
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
The file is in this post

http://xdaforums.com/showpost.php?p=43088306&postcount=387

Very quickly, and I will link you to the full instructions.

You will dial (on stock rom) the dialer code it will open a menu you will choose the selection and then you can plug your phone into the computer, open qpst and connect up to it with your phone being a com port.

Then you would use the back up tab of software download ( a part of qpst) Then you will use the restore tab (of the same software) and chose the .qcn file from the link That guy provided after it backs up your phone it will reboot when it comes up grab a beer and celebrate:highfive:

If you would like help I could give you more help just pm me.

The link to specific instructions, just dont use their .qcn files.

http://xdaforums.com/showthread.php?t=2068041

---------- Post added at 08:34 PM ---------- Previous post was at 08:28 PM ----------

No you can not flash the t999l modem, nor would you want to. the point of this is to open up all bands on the att phone, it will now get att or tmobile hspa

I dont know if the latest att modems are better but it wont hurt to use them, but redoing the nv mod each time you change modems. I think you can put tmo roms on if you want, wifi calling would be a great reason to. most roms do not include the modem so any rom for t999 or 999l will be fine.

---------- Post added at 08:36 PM ---------- Previous post was at 08:34 PM ----------

There really does not seem to be any worry about changing the imei in the backup he made as it wont over write your phones imei, according to the Note 2 instructions.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] upncoming:
Great posts! Thank you New Optimus. Sorry I haven't had much time to put up a thread. I didn't expect Moto to post the link for the file already.

There's no need to edit the file at all. You don't need to add your IMEI to it. Just backup your current nv data with QPST and write MotoDefier's file to your phone.

Thank him when you download! He deserves it!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Yes, Moto and upncoming deserve your thanks for taking the chance (gladly a small one) of bricking their phone.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] upncoming:
NV backup method guide

Guide is ready to go. Let me know if anybody sees anything I missed. Should be good.

http://xdaforums.com/showthread.php?p=43100050#post43100050
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
I haven't been following. So my suggestion of using a T999L NV backup worked?

Sent from my Galaxy Note 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Yes it did, after reading about both the note 2 and the galaxy s4 having that method work I too was convinced it would work.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
Nice! I agree; I knew it just had to work. The final piece of the puzzle was having an equivalent device on T-Mobile (T999L) that had LTE entries in the NV memory. The old method was convoluted and unclear to me at least. But now all you have to do is reflash the backup (5 minutes) if you ever flash a modem, which is a much better tradeoff.

Sent from my Galaxy Note 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] cdsu23:
This method really worked for me in the tw rom. However, when I restored my cyanogenmod backup, it only worked in edge. So, it looks like this method will only work well on tw based roms:(
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
Do you mean the new method or the old one? Because the new one is MUCH easier and sticks across anything except modem flashes.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] cdsu23:
The new method. It worked only in the stock tw rom. Has anybody flashed a non tw rom after flashing the nv back up??
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
You said you restored a cm backup, does that include the old modem?

if a modem flash will revert the settings then reverting to the old modem would as well.

Also and this is just a guess but I would expect that 1900 frequency would be default on att phone so you may have to allow it to get signal from t mobile for a few minutes to pick it up.

I have a i747 on the way, dont have it yet to do any testing but hopefully by wed I will have it in hand.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] cdsu23:
The backup doesn't contain any modem, and I waited more than 10 min.and it was always on edge. I will try to install a fresh copy of cm10.1 just to see if it can connect to aws after flashing the nv backup.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
I have done this like 5 times, and still all I get is edge. I have tried to force wcdma 1700 gsm 1900, and still edge only.

Anyone have any recommendations? I am about to go for a drive around town and just see if it has something to do with my area. But I am pretty sure it is still phone related.

Anyone ever try to see if T-Mobile would do a straight trade for a referb'd s3?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
That is at the moment the problem the aws does not stick after reboot, stock or other rom.

I used the script to put the phone in diag mode, cm10.1 rom and restored the t999l nv items and it rebooted to aws, I know because where I live I only get edge on 1900 but a good signal on 1700/2100.

after a reboot back to edge.:(
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
You lost me, I am not exactly a newb but close enough. So I did as instructed even downgraded to odin 3.04 on one of my reinstalls. Did the factory reset etc......I have never seen 3g/4g on this phone yet. only the ever so confident looking E......

Is all of the reports of success on this forum because they are in the new LTE area's? and not truely AWS?.....

I have not tried the NV method yet, when i went to check it, it appeared that the file to use was removed.

Any other secret codes to enter to test to make sure I truely have AWS active and 1700mhz etc...
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
The nv method works, but it has to be redone every time you turn off the phone. And no its not lte that is running.

I think I can help you set it up do you have a chat program, google, facebook?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Thanks for the offer, but found out my specific problem was the tmobile coverage map lies........all lies........

After I took a short drive about 2 miles down the road I got 4g...........so it looks like my wifi will be the goto at the house, no big deal. I'll bide my time and see what LTE brings.

Next test is trying to reload either paranoid android and then reflashing the modem and the bootloader............if I read everything correctly this will work?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
The new NV method doesn't need the T999 bootloader. Just use QPST to flash the T999L NV backup. It sticks for everything except modem flashes. Then you just apply it again.

Sent from my Galaxy Note 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
unfortunately this is not the case for the S3. You flash the nv backup and reboot the phone and aws is enabled and working, but you restart the phone/power it off and the setting is overwritten and so aws is disabled.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] effortless:
I also want to state that the NV method on the S3 didn't stick after reboot. I wonder if we use the leaked bootloader with the NV method if it'll stick??

I can't test till gf gets home, she lost the 1700 band after I took her off the leaked files and reverted to stock with NV from T999L.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Interesting thought.

I was actually thinking the boot loader itself maybe doing the NV work......

So heres where I have gotten. The reason I was not getting 4g/3g was due to my location, if I go down the road a bit its 4g. and I get about 2500/down 1500/up...............next thing I tried was to load a custom rom over the t999 lts test files, that didn't work at all. I can get clockworkmod recovery installed, but when i attempt to load a zip file it errors out with random issues, likely due to the moded files making it seem like the phone is a t999 and trying to load a 747 file mod.......I attempted to load the t999 mod versions and it was no luck either........So I odin stocked, installed custom rom and then attempted to load custom roms and more issues, not sure what changed but I assume the bootloader is not being reset when I odin stock.......

So I gave up for now and I am going to stick with the lts test for the time being while I try to figure out what I am going to do.

Next issue:

Signal strength? So according to the tmobile coverage map it shows that my house is in a good to strong 3g area. But the phone is only on edge in and outside of my house. I have to go to the "Excellent" coverage area before I see 4g on my phone......

Has anyone compared signal strength between the i747 and any other 4g t-mobile phone to see if there is another issue, maybe hardware related after all? I'm half tempted to go buy a prepaid 3g/4g from walmart and drop the sim card in it and see if I get 3g at the house then return it.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
It is an interesting thought, but unfortunately no. I used odin to put on the bootloader_t999ucalh3 and then used qpst to restore the t999L nv back up, on subsequent reboots 1700 is not accessible.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bleedingthru:
i just got my tmobile sim card and i used the method in the OP and now im on a tmo stock from i somehow lost root can i just reroot and flash an att rom or do i need to go in another direction now ?

my modem also changed to uclh1 my modem was ucdlk3 the lastest att modem
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Following the op would change the modem and such, as far as reloading custom mods I am still not sure, going to mess with that tomorrow probably.

I am going to assume that using the NV method would be more flexible, but the current issue is that every time you reboot you have to reload the nv method.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bleedingthru:
so if i try the nv method will i do any harm to my phone after using this method my phone is charging atm so i cannot test the other method
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
I restored a back up of a newer rom, its 4.1.1 after putting twrp recovery back on the phone, using the method with the older modem. it seems to be working. With that older modem I think there are limitations on what roms will be able to be installed.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
I have not tried that method myself yet. But there is always a risk when doing what we do.

An update on the signal strength question, I ran out to target and bought a $60 suck phone. That did at least have 3g. Seems the signal issue is the towers around pensacola, not the i747..............iow................tmobile coverage map lies.........go figure

New question: using either OP method or NV, how do we load a custom rom like CM10 or PA or AO...............Anything I try to load right now via clockwork fails, hell i even went back to stock and I barely got CM10 to work on it again. As far as the NV method if you load a custom rom you can't use the USSD to open the menu to set the USB mode (*#7284#), correct? So how would we do it that way?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Ok nothing can be done about the crap tower situation unfortunately but you can flash a cm type rom and still use nv method, use this to be able to connect to the computer.

http://xdaforums.com/showthread.php?t=1626638

if you use the method from the op you may want to put your version of cm on the phone first, with the new modem, then in recovery make a back up. I like twrp but not sure it makes any difference. After back up use odin following the instructions in the OP then after its finished and you have tested that everything is working making sure that *#0011# gives you band 4 every time you boot up, try it a few times, and or using *#2263# selecting 1700 will give you a * by 1700 for wcdma.

After you are sure that it works as supposed to put twrp ,or cwm, back on and restore the back up you made previously, oh and put the backup on the sd card that way you dont accidentally delete it while doing this mod.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Doomstick:
Edit: I stand corrected
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
What are you standing corrected on?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dakeshon:
Hello, I flashed the modem and CSC files and I was able to pull 4G using the 1700mhz band, my problem is that when I go to an area where I only have EDGE, I can only connect to GPRS. Is anyone else having this issue?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bleedingthru:
Delete
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Yes I can confirm that.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
Well tomorrow I will see if the backup and restore of cm 10.1.2 works with this fix. I am going to T-Mobile to switch from at&t. I have already odin'd the files and restored my backup of cm, I just need a T-Mobile Sim to check if it works on 1700. The modem is still on h1 so I'm assuming its good but like I said I will verify tomorrow.

Edit: well I believe it works after restoring cm10. Either that or I am in a great 1900 refarm area. If anyone can tell me how to check what band I'm using on cm10 I will gladly verify.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Same here.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Looking through the thread Im seeing that a lot of people are having the same problem I am having : We cant flash At&t roms on our At&t phone.

I used the method in the OP (Odin) and now pick up 4g places I used to pick up edge. I see a couple of people saying we can flash tmobile roms.

Im a little hesitant to do this because I was always told never flash roms from other carriers unless you want to brick. Can anyone help with flashing Roms?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
So yeah, I ended up flashing a T-Mobile Rom (AOSP-Slim Bean) & it booted up no prob!

However, I'm now only getting 3g speeds everywhere I was getting 4g speeds while on the stock rom :crying:

Anyone have any clue why? I hate touchwiz rom's but I may have to go back for that 4g :confused:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
Because the carriers Roms try to lie and say that hspa is 4g. You are probably getting the same speeds, its just aosp telling the truth.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Lying *****es. I'm not complaining though:D
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
I can't install the att or tmobile version of some roms (jellybam, carbon cm10.1, etc) :crying:

Wtf..
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
They require a new modem for compatibility.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Ahhh..I see. And this is where we are stuck at in this thread right?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
There is a workaround to install cm10. Its a lot of work though, you have to Odin to att stock then flash cm10. After that you back up everything in cwm. Then Odin T-Mobile files and install cwm again. Then restore backup. I wouldn't recommend if you like flashing nightlies nightly.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Has anyone tried flashing stock t999l to the i747?

What are the results?

I'm thinking of playing with it today and see if at least the new PDA will get the current kernel with the modem/csc file from OP......and see if all is "happy happy happy"
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Ok so flashing the kernel and system from the stock t999l, with the OP Modem/CSC results in most everything working except, yet again.....It is not connecting to EDGE,only GPRS..........Anyone have any thoughts on that?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] greysonofusa:
Thanks

Thanks this was very helpful!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Try changing or selecting another APN.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
It defaults to fast.t-mobile.com which did have Edge with the original OP settings.

I'm wondering what is causing that to be the only thing different. Its happened to others who flash, then try a custom rom.

At the end of the day Edge or GPRS they both suck and I'll use my wifi at the house, but it would be nice to understand why the change, and if its something a simple file update could fix.

Also going to try updating the modem to the current ATT, and maybe even play with the T999L's. and see what happens. According to the T999L post there will be no signal with the T999L modem, but I'm wondering if our bootloader hasn't changed something... with this mod to make it work.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
I would like to try flashing all the files from the t999L to the i747, modem, csc, kernel, firmware, rom, etc... but I don't have the guts. Or a jtag.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] c47v3779:
Could this modded radio decrease battery life?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
Radios, whether stock or not, can definitely increase or decrease battery life.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
the t999L radio will not brick your I747, it will however just give you no service. reflash an att modem and going again.

I personally tried it just to verify for myself.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
The partition sizes and locations are different across models; that's why the T999L modem won't work. It's the same with the Note 2; that's the NV backup is used instead to enable AWS on AT&T models.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
That is why I would like to try all the files and bootloader. Not just the modem. Flash the i747 as if returning a t999L to stock. Repartition and basically completely flash the i747 into a t999L.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
So uhm. Go for it

You go first :D
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Need the pit file for the t999L I think.

I think I tried that but without the pit file it does not do anything.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
You'd need the PIT as well as all of the appropriate files. You only use the PIT file while flashing other things, such as the bootloader and recovery. If you use the PIT alone, you'll format over everything including the bootloader, and then you'll need a JTAG to get the phone to boot ever again.