yashsingh1/xdaforums huggingface dataset:
[T-Mobile, Samsung Galaxy SIII] imaconeheadXD:
Was wondering if anybody here could answer a question quickly, can I flash T-Mobile ROMs on the new GSM Metro-PCS LTE Galaxy S3? I believe the model is SGH-T999N, but supposedly it is the same hardware as the T-Mobile LTE SGH-T999L version. I believe it should work without issues, just want to make sure though because it's my girlfriend's phone and she'll kill me if I screw it up :o It is already rooted with the T-Mobile TWRP custom recovery version. Thank you in advance for any responses!
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
I seem to remember the modem being slightly different, double check with Doc, it should be fine as long as you flash the individual parts from docs sig without the modem.
[T-Mobile, Samsung Galaxy SIII] imaconeheadXD:
Ok that's what I figured, there is no stock image or ROM for her phone so I just need to be sure, yes she does have a nandroid though. I will wait for a reply from him, thank you :)
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
You can pretty much apply everything about the T999L to the T999N. Just don't flash its firmware! But yes you can flash T999 roms. I suggest you read my Q&A thread. Link in my sig.

But before you do anything, I've sent you a PM. Please check it and let me know if you can help.

Thanks!
[T-Mobile, Samsung Galaxy SIII] imaconeheadXD:
Yup I already read your Q&A I just wasn't sure about this version since it's a different model number, and responded to your PM, unfortunately I don't have the stock recovery though as I already installed TWRP, but everything else is stock for now
[T-Mobile, Samsung Galaxy SIII] silverspoon80:
I was getting 30Mbps DL at home yesterday on a stock+root UVAMB7. since I flashed a new rom, my connection speed has been cut in half (14UL/2DL). I have a T999L w/ UVAMB7 modem and my network type shows HSPAP:15 during download. my network mode setting is GSM/WCDMA (auto mode).(AP settings: fast.t-Mobile, apn type=default,supl,admin,dun,mms, MCC=310, MNC=260)

Any ideas/suggestions besides cell towers being under maintenance? :)
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Well, first let me point out that this probably would be better asked in the Q&A thread. This one is old and has run its course. For all intents and purposes, its a dead thread now. You would have a lot more people viewing your post and potentially answering, and it would be a lot faster too. In this one, I imagine very few people will actually look at it. Maybe just me, and I dont have the T999L, so its much harder for me to help than someone with the device.

Anyway, I know you don't want to hear it, but there have been many times where someone would post about a network data problem, sometimes even insisting that they know for a fact its not a tower issue because it happened right after flashing a rom, or whatever else had been done. But then after spending a day or two asking people for help, they finally call and Tmobile confirms its a tower/network issue. All I am saying is don't discount it as a highly likely possibility. It should only take a few min to call support and ask if they are having tower problems in your area. Less time than getting on your computer and posting about it.

Aside from that, when you just say you flashed a new rom, it leaves a huge unknown for anyone willing to help. You seemed to do good on giving specific info in other areas, but not that one, and it can be the source of the problem. If its any 4.3 based rom, Id be willing to lay odds on that being the problem. If so, there is probably nothing you can do about it. These builds are still very Beta, and even Alpha in some cases. So thats one thing to consider. There is also the possibility of it being a kernel issue, maybe a module mismatch.

Another thing is how you do your speed testing. Most speed test sites out there and without a doubt, the speedtest.net app, are unreliable. The day of the week, the time of day, your location, the test server, and many other factors can affect this. There is also a chance that LTE bandwidth was being overused.

Anyway, I would post over in Q&A, along with the extra information. You may consider trying a different rom just to see if its this particular rom you just flashed.
[T-Mobile, Samsung Galaxy SIII] silverspoon80:
Thank you, Doc
[T-Mobile, Samsung Galaxy SIII] Synyster06Gates:
Glad I was directed to this thread. If I wanted to use stock everything + root, I would simply flash

Via ODIN, correct? That should be everything? or do I need to flash all the other parts separately
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Go to the Q&A thread. Theres a root66 firmware there that I recommend instead of anything here. This was all mostly intended to substitute for the lack of firmware until its release.
[T-Mobile, Samsung Galaxy SIII] afwolfpacked:
Thanks for all the hard work
[T-Mobile, Samsung Galaxy SIII] krad42:
Anyone having issues with not being able to make calls every once in a while. Seems to happen always at the worse time. When calling phones attempts to call then says call ended. It appears to happen more if you make a call then right away try to make another call. Reboot or airplane mode fixes it but it always come back. Tried both modems and seeing the same issue. Any thoughts for a fix?

Thanks
[T-Mobile, Samsung Galaxy SIII] Ryanmo5:
It's a known issue, happens to me every now and then. I don't think there is a solution for it at the moment other than the 2 options you pointed out.
[T-Mobile, Samsung Galaxy SIII] sheltrack:
Can someone explain to me what the difference between the 2nd version of the odin tar firmware and the original firmware? Also, what the difference between the 2nd version odin firmware and the purestock + root flashable firmware?
[T-Mobile, Samsung Galaxy SIII] beachbum40:
NSA hasn't turn there tracking off yet so the phone is actually still connected to them. It takes a min for NSA to disconnect. Hmmm. ;)
[T-Mobile, Samsung Galaxy SIII] Nickdroid86:
Is there an updated version of this stock rom?
[T-Mobile, Samsung Galaxy SIII] Adreaver:
No. This frankenstein version of the stock rom was replaced by Root66 when it became available.

Find the links in the OP of the other thread where you asked about an updated stock rom without searching first.
[T-Mobile, Samsung Galaxy SIII] Johnnyy9262:
Spoiler content hidden.

So will this work for the BNC1 too? LTE of course but currently there are 2 variants of the GS3 LTE
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
It should work fine, just youll need to use your modem and probably the ATT kernel (MJ2 I think...)

If I get some time later ill try to build a new one based off NC2. (Unless someone already has and I just missed it last time I looked! Ill have to check again later.)

This really wont be much different than root66 though. Unless you're just wanting to go to an older build or want it deodexed...
[T-Mobile, Samsung Galaxy SIII] Johnnyy9262:
Any news? I'm deciding whether i should switch to stock since aosp doesn't have wifi calling support
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
There should already be an NC2 rom somewhere in this section.
[T-Mobile, Samsung Galaxy SIII] sjancura:
I am in Sheffield Lake near Amherst and also have seen those speeds on the MD5 modem before - usually late night when there is little data traffic.
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
Download 3G/4G speed optimizer from the market, do some research on 4G network architecture and set the settings based on the highest it supports, apply reboot, test you network, you may have to play with it a bit, but you can really tweak it out for major speed, make sure you download a buuld.prop editor that will backup you vanilla build otherwise you won't be able to reset to stock if you don't have a copy. Build.prop editor by benjamin wolfert backs up your vanilla build, not sure I think you have to get it from xda thread now, I don't think its in the market anymore.

If these apps are even compatible with the S3 the build. Prop editor wasn't compatible with my vibrant so not sure if its a samsung thing or the app, these are what I used for my moto defy that was pumpin 6-10Mbps down on 3G!
[T-Mobile, Samsung Galaxy SIII] tower_gilead:
Im not smart enough for build prop editing, i just want to try and get that modem to stick. So far it installing in twrp but not reporting itself to OS. Still showing up as md5. Or l7 or l8 depending on what i flash before the one doc put up.
[T-Mobile, Samsung Galaxy SIII] Romcrazguy:
Did anyone install the rom and got it to work
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
If you download the 3G/4G optimizer it will edit the appropriate build.prop parameters for you, the build.prop editor I described will backup your build.prop on first run after the su prompt its pretty foolproof just don't try to add props that aren't already there and you should be ok, the optimizer will give you set values to choose from no dev knowledge required, it will add the appropriate prop lines into your build mainly ro.gprs=you want this to be set @34 you can only input customs in the paid version, but that's where the build prop editor comes in. ro.hsupa=36, ro.hsdpa=11 save and reboot, then run speedtest ro hsxpa=1 or 2 set this to 5 if you want network to switch to wifi almost instantly, (this will drain battery FAST)

Also, the modem won't stick until we find a patch to block the auto-revert apn settings
[T-Mobile, Samsung Galaxy SIII] tower_gilead:
My APN's do not auto-revert.

:D

Sent while sleeping in chair.
[T-Mobile, Samsung Galaxy SIII] IDisposable:
Using these settings on MD5 modem in St. Louis, I get a Speedtest of:

15,378 kpbs Down and 574 kpbs UP with 87ms ping.

Revert to the standard APN (epc.tmobile.com) and I get (shock):

14,284 kpbs Down and 616 kpbs UP with 58ms ping.

No idea if we have LTE in STL, but these APN settings DO WORK, even if they don't seem to affect anything under MD5 in STL. They at least don't break anything.
[T-Mobile, Samsung Galaxy SIII] RnRexpress3423:
I haven't updated the modem or APN and this is what I get.
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
Its not going to work on your T999 no matter how much you want it to, its for the T999L different board, different chipset.
[T-Mobile, Samsung Galaxy SIII] mt3g:
Guys lets not turn a rom thread into another LTE thread, kind of beating a dead horse now, and it does nothing for rom development on this rom. Easily can continue this productively over at the LTE discussion thread here.
[T-Mobile, Samsung Galaxy SIII] tower_gilead:
I thought we were trying to find similarities so that roms could be dev'd without building fireplaces. We know that the 99l modem won't kill a 99.....yet.

:thumbup:

Sent while sleeping in chair.
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
Well put, DocHoliday77 and myself have posted this for rom developers being as the T999L hasn't been touched yet by many hands, please pm me if you have questions, lets keep the qestions discussions down to a minimum and for the last time as of current if you flash any of these to your T999 you will get nothing its for the official LTE S3 aka SGH-T999L this device is not the same in any respect, except for the ext4 file structure.
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
[MENTION=1847478]mxlab[/MENTION] I can't respond to your question you sent through pm if your account is set to not accept pm's
[T-Mobile, Samsung Galaxy SIII] ndwgs:
Sorry for the post. Transferred to your Modem/Thread

Sent from my T999
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Well, I have no problem with anyone who wants to give any of this a shot. I am unable to reliably test these things myself since I dont actually have the device, so feedback is essential for us to be able to reach our goal. However, I agree with mt3g's statement about this becoming yet another LTE thread. I was surprised after being gone most of the day to see how many responses this got, but it turns out the majority seems to be T999 owners still convinced that they will get LTE on their device. This is simply not going to happen.

Those of you who were reporting speeds in the 20mbps range are simply getting the upgraded and refarmed HSPA+42 service. If changing some settings got this result for you, that is fantastic, and I ask that you please either pm me with the settings you changed, or post it in my Modem/Baseband thread.

As for the baseband not changing when you flash the modem.....this is just strange. I will double check the script to make sure I didnt make any errors. I will post my findings on that.

And now the ROM's. There are two. If you flash one and want to report on it, please specify which one you tried. We also know that it currently will not boot on a T999 phone. I will try to get this working, but as I have said, this is secondary. My primary goal is to have some way that T999L users can flash back to stock if necessary.

As far as I can tell, only T999 users have tried testing it. What I need to know is if it will boot and run on a T999L.

IMPORTANT: If you are using a T999L, please make sure you have a nandroid backup before testing! If they do not work, you will not be able to go back to stock unless you have one, or until I get them to work. Otherwise, if it fails you will then be forced to find another ROM for the time being.

I think Ive covered most of the concerns so far. I will work on straigtening out the OP now. Please feel free to post any questions and ideas you guys may have. But please lets not try to turn this into something its not, namely a 'force LTE on the T999' thread!

Thank you to everyone for your feedback and help so far. Not trying to run anyone off, just trying to direct the thread back onto the course it was intended for.
[T-Mobile, Samsung Galaxy SIII] allenjthomsen:
Did you install this on a t999 or a t999l i am currently running through the rom now and seeing what differnces i find will report back
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Ohhhh boy.....

I think I inadvertently just conducted an experiment on the placebo effect.....

I am soooo very sorry guys, but I did make a mistake on the modem. The reason it would always show your previous baseband was because it wasn't actually flashing anything. Dont worry, there was actually never any risk involved at all.

It was in fact one of those little details that I overlooked. Basically, I failed to rename the modem to match my updater-script. So it would try to execute the flash, but it couldnt find the file, e.g. no flashed modem.

I have corrected and reuploaded the modem. I saw no other mistakes, so it should work as expected now. (This is why I hate releasing anything I cant properly test myself)

I know a few of you spent a good bit of time flashing and testing, and I am grateful for your trying it and for your time.

Please accept my deepest apologies for this. (And dont kill me!)
[T-Mobile, Samsung Galaxy SIII] tower_gilead:
No harm no foul

Sent while sleeping in chair.
[T-Mobile, Samsung Galaxy SIII] allenjthomsen:
Tried the modem and could not get it to work on my phone
[T-Mobile, Samsung Galaxy SIII] The Sickness:
I did the DL from yesterday. Changed apns like the post a page back listed. Data speeds did increase...but not like mind blowing.

This morning saw the op had changed the name of the file so it will show the name of the modem in settings. So I DL it this morning.

Got no data at all after flashing. When I went to data settings a screen popped up saying to insert sim to access data settings.

Just a heads up
[T-Mobile, Samsung Galaxy SIII] EtherealRemnant:
This is not entirely correct. While its true that the T999L uses an MSM8960, the T999 uses an MSM8260A which is the same chip without an LTE modem. They're both S4 chips and they both have the same board. The only hardware difference between the two is the LTE modem and antenna other than binning for speed (MSM8260A chips tend to actually be more overclockable than their 8960 counterparts) and the difference in heat generated by the LTE modem when its in use. Everything else in the device is the same.

The only reason I'm pointing this out is because I don't want everyone who doesn't want to get an S4 or One to think they're getting any significant upgrade by getting the LTE version of the S3. They're not.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Thanks for trying it out guys....again!

It doesnt surprise me a bit that the modems are incompatible. The LTE radio is integrated into the SoC, which is an entirely different chip than the T999. The T999L uses msm8960 while the T999 uses an msm8660 if I remember right.

Thanks again guys.
[T-Mobile, Samsung Galaxy SIII] eterno13:
I installed the modem and the baseband says unknown...and had no signal at all
[T-Mobile, Samsung Galaxy SIII] Slypnslyde:
How are you guys Installing the modem when I try it flashes really quick so I know it's not working cuz other ones take a bit.
[T-Mobile, Samsung Galaxy SIII] eterno13:
That one its the old doesnt flash anything...download it again and flash it...but dont work in t999 you gonna see it
[T-Mobile, Samsung Galaxy SIII] tower_gilead:
Do you have the 999L?

Sent while sleeping in chair.
[T-Mobile, Samsung Galaxy SIII] critofur:
So, which line is the one causing your speeds to be faster???
[T-Mobile, Samsung Galaxy SIII] :
The MMS Proxy. When I had it set to None, I was only getting 7000-8000kbps. With the MMS proxy set, I'm now getting 18,000-20,000kbps.
[T-Mobile, Samsung Galaxy SIII] LoopDoGG79:
For all those that think that the T999 is capable of having LTE, sorry to burst your bubble, but it is not possible. I could go on and on about how that the T999 does not have the hardware and provide sources. Let's just look at it logically. The reason they came out with T999L, or the S3,with LTE, or per say, added LTE, is because the T999 is missing it. Doc thank you for all your work and dedication, contributers like yourself make it possible to flash with less worries. :thumbup:

Sent from my Galaxy Note 10.1! :D
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Ive mentioned it months ago, but you really only need 2 ponts imo. First there is no evidence to support the idea that the T999 has capable hardware. Second, even if it had the hw, it would be illegal as Samsung never licensed it through the FCC to be allowed to use LTE.

I truly hope that we can put this to rest. I thought it should have been last year! I appreciate everyones passion on the subject, but in the end I believe the time can be better spent on research of other topics.

Thanks to everyone who gave the LTE modem another shot. Though I didn't believe it would work on the T999, I am very glad that we know for sure now.
[T-Mobile, Samsung Galaxy SIII] mxlab:
Sorry for that... MotoDefier Will Change my settings

---------- Post added at 04:31 PM ---------- Previous post was at 03:41 PM ----------

I need to know if its safe to flash CWM, from T999 to T999L
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
Do you mean you are currently on a T999 rom and want to flash one of the T999L ROMs?

It should be safe. If you have a T999, though, currently it wont work. If you have a T999L, I dont know if itll boot or just hang at boot like on the T999. I do need someone to test that though.

If it does hang during boot, you can just flash a working ROM over that. At least thats the case on the T999. The only real drawback I expect if it wont boot, is that you will not be able to get back to the T999L stock system till I fix it.

If you are running CM rom you would have to flash the kernel too most likely.
[T-Mobile, Samsung Galaxy SIII] DJ_SpaRky:
I am using CWM Touch and was using TWRP on mine, both from DocHoliday77`s DevHost account.
[T-Mobile, Samsung Galaxy SIII] mxlab:
T999L Root

Thanks 1,000,000,000,000
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
[MENTION=1847478]mxlab[/MENTION] just to be sure for testing purposes, you flashed one of Doc's roms to your T999L successfully and now have root correct?
[T-Mobile, Samsung Galaxy SIII] sparkie6point0:
Just curious - does the 999L have a heftier battery than the regular 999?
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
Not sure, thats kinda low on development priorities, lol I will check and let you know though. I doubt it though.
[T-Mobile, Samsung Galaxy SIII] Bray90820:
Is there any word on being able to flash the T999 Roms that require the new bootloader
[T-Mobile, Samsung Galaxy SIII] MotoDefier:
I'm assuming your talking about the multi-window support update that Tmo just pushed to its first group of customers, by the time its ported you will be recieving the same update for your T999L I spoke with samsung support today and they did confirm the device will get the same update, but they didn't confirm when, they did make the statement that they push the OTA's to groups instead of everyone at the same time. However DocHoliday77 has much history with samsung devices, and based on the past, sammy releases the predecessory firmware before they push the OTA. keep an eye out for it, we will be working on a full stock, rooted stock, rooted custom rom based on the original firmware, as well as a mulit-window update.zip for your T999L stock recovery, after all another really cool feature of this device is the stock recovery with adb support and adb sideload support making custom roms, and kernels very accessible.
[T-Mobile, Samsung Galaxy SIII] Bray90820:
Actually I was talking about Cyanogenmod the newest version i can install is RC2
[T-Mobile, Samsung Galaxy SIII] gypsy214:
Correct.. If the T999 was capable of LTE dont you think T-Mobile should have turned it on with the new update? Like they did with the Note 2... Or better yet making a rom for the AT&T GS3 to test their LTE? They wouldnt come out with a newer model of the GS3. It just doesnt make sense, It would cost them a lot of money.. In my opinion They should have done it at first like they did with the Note 2. Another thing is Making this device known here on our Forum for newer users not bricking their devices thinking is the same.. We already have some users flashing the international GS3 to T999.
[T-Mobile, Samsung Galaxy SIII] arathur:
How did you manage to flash the T999L - UVAMB7 LTE Modem onto your SGH-T999??? I'm running stock T999UVDMD5, deodexed and rooted (http://xdaforums.com/showthread.php?t=2276645). Every time I try to flash this modem with CWM recovery 6.0.31, it boots up just fine but the service is gone, baseband version is "Unknown," network is "Unknown," IMEI is "Unknown." If I reflash the UVMD5 modem, everything goes back to normal. But again, when I try to flash this LTE modem, I lose all service.
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
I haven't heard anything. And I dont generally use CM, but my guess it they will probably add it in with an ipcoming update. In tge meantime, there are a couple of ways to get around it.

Unzip the rom and either add your device to the 'asserts' or remove them all ftom the updater-script.

Note that there is a reason this was done. If you experience bugs, dont report them. Your firmware should be new enough to work fine with it though.

just to clarify, I dont believe they release the firmware first, but pretty much at the same time. Most will be able to update using the firmware much sooner than waiting for an ota.

And of course once it is released you will find both stock and root66 versions here soon after.

That was on the first modem release, I made a mistake in it and it wasn't flashing anything, so this test was done with whatever modem he already had.

The mistake has been fixed now, btw.
[T-Mobile, Samsung Galaxy SIII] ziggy46:
you can add "hipri" to the apn type too, then you get higher priority on the network (i believe thats how it works)
[T-Mobile, Samsung Galaxy SIII] LoopDoGG79:
Will you add it before "default" or after "dun"?
[T-Mobile, Samsung Galaxy SIII] ziggy46:
i dont think it will matter where it goes, it just has to be there somewhere for the phone to use it
[T-Mobile, Samsung Galaxy SIII] DocHoliday77:
I would put it first. That watmy if the order does matter, itll be used first. I doubt it does make a difference, but in case it does...
[T-Mobile, Samsung Galaxy SIII] ohshootrawr:
If I only use the modem, do I still get the lte upgrade?