yashsingh1/xdaforums huggingface dataset:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] TASL:
Clarification Please.

I just read through this thread and still have a few questions:

1. The NV backup method will NOT stick across multiple reboots regardless of what ROM is used?

2. Using the method in the OP, the 1700AWS band WILL stick across multiple reboots? Any ROM or only TW ROMs?

3. Should I be flashing T-Mobile ROMs or AT&T ROMs? TW or AOSP? 4.1.2 or 4.2.2?

4. If I want a stock/rooted T-Mobile experience, can I flash [Stock][ROM]Galaxy S3-LTE (d2ltetmo) after ODINing the files in the OP?

5. Is it possible to flash SlimRom after loading the ODIN files?

6. The OP files flash a T-Mobile modem, AT&T CSC:

- What happens when I flash an ATT Modem? Do I need to flash an ATT Modem?

- Will I have access to T-Mobile's LTE service if it is available in my area? Are there any special steps for this?

7. What is the most hassle free way to get a 4.1.2/4.2.2 ROM on the SGH-I747 with AWS 1700mhz permanently enabled?

Thank you in advance, dropped my AT&T plan while I was out of the country for a few months - will be switching to T-Mobile when I return next week. Hoping to spare myself the cost of purchasing a new device to get proper data speeds.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
Please note the answers I am providing are to the best that I understand currently, if anyone else feels the answer is incorrect please do not hesitate to correct me!:good:

Correct. as of right now, but from what I understand they have developed a way to restore the AWS NV via the phone which requires a single reboot.

Using the OP method will stick via reboot, provided the bootloader/csc file is not replaced it seems to stay regardless of what system/rom is used. From what I can tell the only downside of doing this is that if you are not in range of AWS or LTE you will not get edge. only GPRS

See last question.

Yes, that is what I am currently using.

Unknown what the results will be, but again as long as it does not replace the bootloader/csc file I think it will be ok with the only drawback being no edge.

Unknown, i think i read that flashing the ATT modem has no effect one way or the other.

LTE is usable even with out using this mod if it is available in your area

Right now hassle free and most useful to myself was to follow the op, then flashing the Stock t999L system.img. You get all of the t-mobile extra's (wifi calling etc.) and lte/aws.........the only downside was no edge, but i just use wifi at the house where i have the problem anyway.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] TASL:
Thank you very much for taking the time to answer my questions. I will follow your method, was my initial instinct to remove potential issues - except was going to flash the deodexed version. Flashing the straight system image makes good sense though.

Just to confirm, other than no edge - I'll have access to AWS, 1900 and LTE Band IV with the Op files?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
yes. It works fairly well the real drawback is the ICS modem that enables this has to be used if you flash a new modem it breaks the HSPA AWS.

and so to use a newer 4.2.2 rom you would need to put that on (while using the new modem) then make a nandroid backup then after putting the older modem on (which comes with the older rom and bootloader) you would then restore the backup you made.

A long and convoluted process.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] upncoming:
Thanks for testing this. I was curious if the kernel was compatible, but haven't had time to test it... I think I will see if that kernel wants to tell the phone to overwrite the nv data... I've been up to my ears reading source code trying to find the overwrite script. It'd be nice if there were an easier way.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] post-mortem:
I'm not 100% sure, but I think if you do it in Mobile Odin you can choose the same file to flash for the different sections (Kernel, System, Data, etc.) and not do the Modem one. As I understand, rather than flashing all partitions within the file, it will then do it section by section. So it would extract & flash the Kernel, then extract & flash System, and so on. This way, you could flash everything other than the Modem.

I don't know... it's late & I have a headache. Does what I wrote make sense?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Yes. I can confirm this.

SlimRom (AT&T version) is actually the the ONLY Aosp based ROM that I've gotten to work after flashing the files in the OP.

Cm10.1, Carbon ROM, and Jelly Bam would not install.(T-Mobile & at&t versions)

Please reply if anyone finds any other AOSP ROMs that work. :thumbup:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Nevermind.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
I forgot to mention that if you want to write a aosp rom to the phone, you'll have to edit the cwm zip file to remove the assert protection's, its what verify your installing the correct rom to the correct phone. Because the bootloader is saying its a non standard/stock it won't let you flash most aosp's with out altering that file.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] c47v3779:
This radio is awesome but it drained my battery for some reason.

I had to revert back to the newest stock radio since I was getting 7 hours max out of one full charge.

Anyone else experience this?

Would love to flash it back. I was getting 3G everywhere!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
I've got what's probably a stupid question, but I need help understanding. I have the i747, I unlocked it with the method here in the forum. I will be going to tmo prepaid with it in September when my contract is up. Is it as easy as putting the tmo sim and having data after I enter the apn? As a note, there is no lte anywhere near me nor do I ever travel to places there is, so I don't care about lte. Will I get normal data speeds (I'm used to 2-4 mbps with att in my area) without having to mod anything? Thanx for any explanations.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
The most hassle free way in my opinion is to flash a t999 rom instead of the stock t999l. It has all the features.

Rooted almost pure stock

http://xdaforums.com/showthread.php?t=2276645

My favorite

http://xdaforums.com/showthread.php?t=2279790

I just use the nv restore method when I need 1700 band.

If someday I can flash to full t999L to not have to mess with the modems it would be good. Until then I love my stockorama i747. I admit it was a little tricky to get the full tmobile options because of aroma and my build prop.

It is worth it though.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
If you only unlocked the phone, you will probably only get 2g data, unless you live where T-Mobile is changing over the 1900 to 3g. If you flash the stuff in this thread you will be able to have fast data on 1700 too which will speed up your phone a lot. If you have any questions let me know and I will help you out.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
Thanks. Then I do have another question. Will I be able to use any rom as long as I have the proper bootloader and modem? Or will I have to stay with only the files provided here?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
That's where it gets complicated, to install any aosp ROM you need to edit the files that get checked in recovery as your phone won't be listed. But most tw Roms work.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
Oh ok. I was actually leaning towards going back to tw roms from slim. I miss the smoothness stock gives. And since I wont be limited data like I am with att, it'll be good. Can we take this convo to pm so as not to clutter the thread? I'm going to need a bit more help as I'm not understanding the instructions thoroughly. Thanks again.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kschumake83:
Email is better if you want, I don't check PMs often , just put my username [MENTION=652814]gmail[/MENTION].com
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
Thank you sir. I will email shortly. :)
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
i747 to t-mo

Well folks I know you;re probably sick of these type of questions but I'm stuck....I have an att i747 and I flashed the 4 engineering t-mo files to it,,,it still shows i747 in the setting and it unrooted it, so my goal is to get a t-mo rom so I can get wifi calling and hotspot on it. I had 4g even before the flashing I guess because here in FL they have the refarmed towers. The phone is basically the same after the flash it has 4g and then occasionally it drops to edge (no 3g). is this normal? If yes can I reroot using a t-mo file or an att file? I plan to install wicked rom on it but again I'm not sure if it will brick my phone or not...thanks for any help.

kvan
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] maxrdlf95:
I have an I747m from Rogers does the trick is still the same status lost on reboot? to get the band on Tmobile because Im going to USA and I will buy a sim card I dont know if I can buy an ATT sim any information would be helpful thanks
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
All you need is to flash twrp recovery then download the rom of choice and install it through recovery.:good:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
Thank you for the reply, I did just that, so in case some other noobs is reading this I will explain what i did..I first rooted the phone then installed the 4 t-mobile engineering files on the phone. after this process the phone was back to unrooted, so I installed CWM and rerooted and installed the wicked rom...it's important to note some members told me to stick to touchwiz based roms only.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
Do you get 4g lte speeds?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
ATT i747 on T-mobile

Yes 4G, It's a bit confusing, I would have never bought an att s3 if it wasn't for the fact I tested it with my sim and it showed 4g after I activated it. Later I found out that it's because I live in a newly refarmed T-mo tower area, so 4g was available without rooting or rom install. However the problem was no wifi calling and hotspot, also it was either 4g or edge, no 3g.....I should tell you that I have not seen 3g yet even after the flash. Perhaps I did not flash it right but I do have wifi calling and hotspot right now.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
"4G" is 3G. The carriers just renamed it to 4G as a marketing term. I thought you guys knew this. That's why on my phone's custom ROM, it shows H and H+ for HSPA+ like the international phone.

Sent from my Galaxy Note 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Most samsung phones (that I have seen or read about) have a 4G LTE icon when your on LTE.

Purely stock android roms will say 3G, H, H+, and 4G The 4G indicates LTE

kvan Where do you live, If your in a refarmed city there is a good likely hood that you also have LTE but that is not for sure.

The Phone will pickup t mobile LTE right out of the box so that isn't a concern. I can tell you for a fact that a phone modified with the files in this thread will pick up t mobile lte.

I can also tell you using a AOSP,AOKP rom works just fine the only problem is you can not get the service menu that allows you to change the frequency.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Anyone know why I keep getting "Status 6" failure when trying to install roms now?

I go inside of the zip and delete all of the lines above "Mount" in the script-updater file and have only had one rom to install using this method. (Jellybro)
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
I highly doubt tmo has refarmed in my area, seeing as how there is barely an h+ signal here with att, but is there a way to find out?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
Unofficially, yes. If someone in your area has picked up 1900 MHz HSPA+ in your area, you can check http://airportal.de to see if they reported it.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] pre4speed:
Yup as thought, closest one to me is 35 miles away. So with this mod, and no 1900 near me, I should get download speeds of what? I get 3-5mbps with att where I am now. I've pulled a 7 once. Lol
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrjd:
And I am in mobile, al today. Here's a speed test off one of the new lte towers with my i747
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] RussianBear:
Delete.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Anyone know why I keep getting "Status 6" failure when trying to install roms now?

I go inside of the zip and delete all of the lines above "Mount" in the script-updater file and have only had one rom to install using this method. (Jellybro)

Is it because I don't have the latest modem?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Most roms will require newer modem. Since this mod is using an ics modem it is blocking the install.

You can get around this by updating the modem installing the rom making a nandroid backup in recovery then reflashing the older modem setup then restoring the nandroid.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] OmegaBlaze:
Thanks! Would I be able to update the rom (Nightlies) without any problem after I do this procedure?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
That I dont know. I would guess no. every update will see old modem and error.:(
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
I live in Miami, yes they have T-mo LTE here, atleast that's what it say on the other att s3 phone (unrooted) with my t-mo sim card. After the flash i only see 4g...but the speed check showed I get LTE speed.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
T-Mobile 4G is as fast as their LTE, and in some cases, faster than it. So you could very well be not getting LTE anymore. You can tell if you go into Settings -> About Phone -> Phone Status. It'll tell you the network type you're connected to. All AT&T phones support AWS LTE (which is what T-Mobile uses) btw.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
The upload speed on HSPA is never going to be higher then 4mbs up, limitation of hspa, and mostly is 3.3mbs or lower. LTE can get very high.

Yes very simply just open menu/settings/about phone/status and it will say network umts/hspa/lte
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] zanzee:
I get 20mbits off hspa its just your service provider
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] fffft:
I747m phones

Just for the information of any Bell readers.. none of the methods in this thread work for the I747m model. At least not the Bell I747m. I'm not referring to the loss of AWS on reboot.. rather I'm saying it doesn't work even in a tethered manner. Enabling NV item 1877 will join the network for a few seconds.. but the phone quickly transitions to a no service state.

I don't have a phone with Rogers or Telus branded firmware, so it's possible that you can use those in a tethered boot. But the Bell model won't remain connected.

Update: Solution for Bell S3 phones
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
Sorry for the delay, yes I checked and you're correct the menu say UTMS 3...not LTE, Well fooled me...With that said can I unlock LTE or do I have to reflash?

TIA

kvan
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
lte is unlocked att does not lock out aws lte check at different times/places your lte might be low signal
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] kvan99:
Ok...thanks,I also updated the APN settings, it did not have "fast.tmobile.com" I also went into *#2263# and chose 1700 as the WCMDA and LTE 4.The speed test was a bit slower than the automatic setting but then again I think the area where I live may have a weak LTE signal as you mentioned. I will check again near the airport where I work to see if I cancoonect to LTE. Thanks again!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
You choose one. It will switch to it. then go out and check if you have signal. Check the status and see if it connected and the network type it was connected to. Then go back and change to another.

Each time you select one band it locks the phone to that band. Choosing automatic allows the phone to choose what it thinks is the best signal.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] perroschatos02:
I have a att gs3 what's the best way upon doing this? I want to get net10 or T-Mobile prepaid. Thanks in advance.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] jblparisi:
You could start by reading the thread from page 1 then coming back when you have any questions.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] perroschatos02:
Well that's helpful I have been reading from page 1 I was just trying to get it broken down easier
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] jblparisi:
I am not trying to be rude or anything.

Only way to find out is testing each method and see what works best for you.

Your mileage will vary depending on how you want to go about it. In my case I used a stock unlocked i747 with the nvbackup method followed by twrecovery for TMobile, Stockarama TMobile base( including WiFi calling) and T999 stock kernel.

Hope that helps.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] bleedingthru:
Has anyone had any luck getting this method to work an a cm or any other aosp ROM ?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SuperAfnan:
Alright finally I enabled 3g on my S3! :)

It was tedious but well worth it!

To anyone confused just read the first page, load up the files in Odin, and flash them in download mode.

If your drivers aren't working right uninstall them and restart your pc, then reinstall. It worked like a charm when windows couldn't detect my phone or install drivers. :rolleyes:

Once that's done you'll see 4.0.4 in settings. Go into dialer and use *#2263# and choose 1700 as the wcdma band preference.

Then what I did is I used mskips toolkit and flashed stock AT&T 4.0.4 ICS. And also rooted it, flashed recovery, and whatnot.

Lastly, I flashed deTmobilized and now have a working phone with AWS :).

I hope that helps anyone, to be honest this thread was confusing even to a HTC amaze rom chef. The problem was that it's hard to find stuff when people working on the mod were mixed with noobs, confused people, and people going off topic. That just made it confusing.

If you have questions please don't PM, post it in this thread. :D And this took me 2 hours because of the confusion and clutter lol.

Hope this long post helped you.

TAKE THAT AT&T! Xda slapped you once again! :cool:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Yes it can but you have to go a long way around to make it work.

using the new modem you have to install the rom you want, then using recovery make a backup of that rom then put on the older modem/rom combo then put the recovery back on and restore the cm rom.

hey super, the nv backup method works if you want to have newer modem, just have to do the nvbackup app to redo it on every reboot.

I have used both methods and this one other then using ics is a great one for one time and done.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Fatty1212:
Stock rooted 4.1.1 ATT, flashed the OP modem n CSC only...
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SuperAfnan:
Yeah but I just flashed a JB touch wiz Rom and it sticked. :D

What's the benefit of a newer modem? Is it just better signal and speed? Sorry I'm not used to Samsung (at all lol).
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Not really sure if there is a benefit to the new modem, other then without it many new roms will have trouble installing, especially cm roms.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] valleyboss209:
Why do all this since tmobile opened up the spectrum all I did was unlock my s3 and slap a tmobile sim in and bam. Lte
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
It is not for LTE, att phones come with AWS LTE right out the box. But if you only have HSPA then the att phone will not get t mobiles 1700mhz frequency without modifying.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SuperAfnan:
Since I don't have Lte in my area, is it automatically started when mobile network is enabled or is there a secret toggle for it?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
If you are set to automatic it will choose 4g Lte if it is available. No modifications needed. Just make sure you have the (fast.t-mobile.com) APN in your apns

In areas that are re-farmed , most of which have Lte, you will get tmobile "4g" on 1900 with your i747 without modifications.

If the phone is not modified, You will not get tmobile "4g" (really 3g hspa on aws 1700/2100) on your i747.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SuperAfnan:
Ah thanks for the clarification. I set it to automatic and no Lte popped up, just UMTS/HSPA 3g. (aka the fake 4g).

Well, looks like T-mobile hasn't refarmed my area yet. Oh well. :rolleyes: I hope they do it before December at least. It should be in parts of the city though.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] athlonxp2300:
If you have not done one of the two forum modifications to enable "4g" (3g on aws 1700/2100) and you are getting "4g" you are in a refarmed area.

*#0011# will tell you the band.

Settings, about phone, status. Will tell you the network type.

---------- Post added at 01:01 AM ---------- Previous post was at 12:55 AM ----------

Make sure you have the fast.t-mobile.com APN.

I was in a refarmed area and not getting lte from some towers but was from others. After setting up the new APN I started getting LTE more areas.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
That is interesting. I do not have fast.t-mobile apn selected and my lte works, plus with the HSPA AWS mod my download speed is quicker when lte is not available.

Super your in jax have a look at the http://airportal.de/ That is a list, by users that has hspa on 1900 for t mobile. you can see for jax they are along the east 295, used to be 9A mostly.

If your phone stock is showing 4G then you must be within range of one of those towers, but as mentioned dial *#0011# and it will say band 4 and then show HSPA or LTE.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
It's known that epc.tmobile.com gives your faster HSPA+ speeds, and that LTE still works fine for most people.

Sent from my Galaxy Note 2
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] SuperAfnan:
So epc is better than the fast apn?

Optimus I did the mod already since my area wasn't refarmed yet. Lucky Eastside people lol. Since Lte never came up I presume I don't have it in my area. I'm guessing it's in downtown already though. So it's probably refarmed there too. So I have to play the waiting game now lol. :rolleyes:

Hey guys does the mod only enable 1700 for download and upload, or 1700 + 1900 for both download and upload? :confused:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] New Optimus:
Ya it appears all the towers that have been refarmed are the main ones putting out lte.

Have you checked www.sensorly.com to see if anyone has mapped lte near you? I know there are few jacksonville mapped locations, I did most of them:cool: on atlantic blvd. area.

Yes it is in downtown I was there a week or so ago and had a strong signal.

t mobile uses the 1700/2100 for upload and download, I dont know which is which but upload is only on one, download on the other. This mode allows them to be used, It does not block 1900 so if (and this is unlikely) your 1900 is a refarmed tower and its better signal the phone will use it.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Product F(RED):
You either have AWS or you have 1900. AWS = 1700 down, 2100 up (or the other way around, I forgot). 1900 = up and down. AWS = DC-HSPA+ (faster speeds), 1900 = HSPA+ (normal speeds).