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at&t stock firmware on t-mobile s4

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can I flash a at&t stock firmware with odin to my T-Mobile m919 with out any problems...right now my s4 is sim unlocked and im on at&t network .and it seems like its working ok but signal a little on the low side and spotty lte service....would there be any advantage flashing at&t's stock firmware to use on att network .would it lock my bootloader..would my service and signal be any better.....if I wanted to would I be able to flash back to T-Mobile stock firmware...will it work....anyone try this ..anything I should know before I do this ...thanks in advance

[email protected] said:
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can I flash a at&t stock firmware with odin to my T-Mobile m919 with out any problems...right now my s4 is sim unlocked and im on at&t network .and it seems like its working ok but signal a little on the low side and spotty lte service....would there be any advantage flashing at&t's stock firmware to use on att network .would it lock my bootloader..would my service and signal be any better.....if I wanted to would I be able to flash back to T-Mobile stock firmware...will it work....anyone try this ..anything I should know before I do this ...thanks in advance
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[?quote}Originally Posted by Misterjunky View Post
Nope, it won't lock or re-lock your phone, once a phone is unlocked properly it will stay that way
regardless which rom you flash and regardless if you're on the AT&T network or Tmobile network.
Do not Odin flash the AT&T stock firmware on a Tmobile phone even if it's unlocked.
If you do you will not be able to make or receive any phone calls.
You can flash AT&T or Tmobile CWM/TWRP flashable stock or custom zip file roms because
those do not contain the radio/modem images like the Odin flash firmware do.
If you odin flash back to stock Tmobile firmware you will loose root unless you re-root after flashing.
As far as bootloaders go, a Tmobile phone requires a Tmobile bootloader, but you don't need to worry
about that if you flash the stock official tmobile firmware with Odin.
All the other tmobile and at&t cwm/twrp flashable zip file roms found in these threads don't contain
any bootloaders that's why they can be flashed on any unlocked and rooted tmobile or at&t phones.[/quote]
so the hardware is different is that why you cant flash att stock firmware with odin on a T-Mobile s4

[email protected] said:
[?quote}Originally Posted by Misterjunky View Post
Nope, it won't lock or re-lock your phone, once a phone is unlocked properly it will stay that way
regardless which rom you flash and regardless if you're on the AT&T network or Tmobile network.
Do not Odin flash the AT&T stock firmware on a Tmobile phone even if it's unlocked.
If you do you will not be able to make or receive any phone calls.
You can flash AT&T or Tmobile CWM/TWRP flashable stock or custom zip file roms because
those do not contain the radio/modem images like the Odin flash firmware do.
If you odin flash back to stock Tmobile firmware you will loose root unless you re-root after flashing.
As far as bootloaders go, a Tmobile phone requires a Tmobile bootloader, but you don't need to worry
about that if you flash the stock official tmobile firmware with Odin.
All the other tmobile and at&t cwm/twrp flashable zip file roms found in these threads don't contain
any bootloaders that's why they can be flashed on any unlocked and rooted tmobile or at&t phones.
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so the hardware is different is that why you cant flash att stock firmware with odin on a T-Mobile s4[/QUOTE]
i was under the impression that the hardware was the same and the firmware / modem /radio firmware controled the radio Frequency

[email protected] said:
so the hardware is different is that why you cant flash att stock firmware with odin on a T-Mobile s4
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i was under the impression that the hardware was the same and the firmware / modem /radio firmware controled the radio Frequency[/QUOTE]
If you want stock att, just flash this through recovery http://forum.xda-developers.com/showthread.php?t=2307157
Sent from my HTC PH39100 using Tapatalk 2

re: ATT&Tmo
[email protected] said:
i was under the impression that the hardware was the same and the firmware / modem /radio firmware controled the radio Frequency
so the hardware is different is that why you cant flash att stock firmware with odin on a T-Mobile s4
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The hardware is NOT the same.
If the hardware was the same for both the AT&T S4 and Tmobile S4 phones then there would only
be one model for both carriers and both carriers would be using the same frequencies of operation.
It's not the software that determines the frequencies of operation, it's in the hardware.
Another thing is that the AT&T has a locked bootloader, the Tmobile bootloader is not locked.
(Whether the bootloader is locked or not it has nothing to do with rooting)

He is correct here...they are not similar. 2 different modems etc.

Can I Flash AT&T US firmware with Non-branded germany firm ware using odin?
Can I Flash AT&T US firmware with Non-branded germany firm ware using odin?
Any help on this will be great!
Wondering if that will brick my phone. I am using Unlocked AT&T US model in India and wanted to flash it with Indian or European firmware,
Thanks in advance.
Vikram

Vikram26 said:
Can I Flash AT&T US firmware with Non-branded germany firm ware using odin?
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No you can't

Thanks Doktor
doktor buknasty said:
No you can't
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Click to collapse
Thanks Doktor
---------- Post added at 02:24 PM ---------- Previous post was at 02:13 PM ----------
doktor buknasty said:
No you can't
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Can I flash with anyother country firmware using other method please? I don't want to use AT&T Stock firmware.

Vikram26 said:
Thanks Doktor
---------- Post added at 02:24 PM ---------- Previous post was at 02:13 PM ----------
Can I flash with anyother country firmware using other method please? I don't want to use AT&T Stock firmware.
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No you cant. You have stick with att firmware or else your phone will be a brick.

What would be a better phone to get to use on AT&T? An unlocked T-Mobile S4 or an AT&T branded S4?

AT&T ROMS on T-Mobile S4
I've been attempting to install the stock AT&T firmware on my T-Mobile M919. I understand after reading the thread that this is not possible which is why the Odin flash always fails. I am using an AIO (AT&T) sim card. I have been flashing ROMS built for the I337. Most boot loop after install. Those that install successfully cannot activate the WIFI function on the phone. Both Xperia and Darth Stalker work when installed for the AT&T variety of S4. Today I read the Goldeneye installation instructions which state if the AT&T baseband is not flashed on the phone, then WIFI will not work which is the problem I routinely experience. So my question is should I be flashing T-Mobile S4 roms even though I have an AT&T sim? or do I have another issue? The phone is rooted and sim unlocked. Thanks!

I own a i337M S4 is it possible to flash via odin the i337 att firmware? and have the modem and everything still working? So basically I want to take my Canadian S4 and make it usable in the US? I'm going to be moving in a few weeks.

Hi, I have the same question.
I am planning to install Telus rom v 4.2.2 on Fido S4 which is on Android 4.2.2 Baseband i337MVLUAMG1.
I have unlocked (SIM) the phone using unlock code and Rooted using CF auto root.
Have TWRP installed. Have made nandroid back up.
So here are the steps I am going to follow.
1) Download Official Telus Firmware (4.2.2 AMG) from sammobile.
2) Wipe to factory default using TWRP.
3) Flash Telus firmware 4.2.2 using Odin.
4) Root the phone.(CF-Auto Root)
Can someone please tell me if this is OK?
Are there any chances of bricking the device if you install telus rom on fido phone?
Just want to make it sure before I proceed.

[Q] Can I flash UK firmware on my canadian GS5?

I bought my GS5 from Canada which means it's set on canadian LTE bands, now I'm trying to use my phone in UK and it doesn't connect to data network, not even HSPA so I was thinking that flashing a UK firmware might solve the problem because I read somewhere that since GS5 runs on Qualcomm its hardware supports all LTE bands by default but I am still afraid that the wrong firmware might brick my device. Can anyone please confirm that information. thx a lot

As long as that firmware is supported by your specific GS5 model this should not be a problem.
I live in South Africa and have flashed many stock firmwares from different countries.
Just a note... you might not have to reflash the entire ROM but merely flash a supported modem/change the csc. Changin the csc does however factory reset your phone.

Yes but a different csc file from the stock rom version will prevent the phone from receiving ota update. Anyway it's not my phone so I won't take any risks and the owner seems to be fine with hspa connection.

Search sammobile.com for the phone model and stock firmware from UK. Just flash that and then you won't have to change the csc
Sent from my SM-G900F using XDA Premium 4 mobile app

network unlock or modem swap i337m on 5.0.1

Hey people, I have an issue going on here.
I was going to unlock, but decided to reflash firmware and change the csc from rogers over to bell.
Kies recognizes the phone now as being a 'bell' phone, and have done an update just to confirm it but it still will not accept a bell sim. Every time I have inserted a bell sim it requests the 4 digit unlock code. The sim works just fine in my S3 and another bell S4, so that is not the problem.
All settings in the phone also show it to be 'bell', home screen and all, so the csc did take.
All the modems/firmware on sammobile are multi-csc, as i have tried to just flash the modem alone after I extracted it.
I could care less about being truly carrier free, as I am locked into a bell agreement through work.
Any suggestions on this, or do i have to purchase a code? I assume its locked now so I cannot downgrade to my understanding to a lower modem to use the service menu to unlock.
Thanks for the input.

I've flashed from a Bell 4.4.2 to Telus 5.01 without issue and the phone will remain sim-locked. The only difference I have seen between the Bell, Telus, and Rogers ROM are the carrier apps included with each ROM.
The sim unlock code is 8 digits long.
You should be able to downgrade the i337m's 5.01 stock ROM to a i337m 4.4.2 stock ROM. Then install the 4.2.2 modem, root the phone, run region unlock app, re-flash stock 5.01, and the phone will be sim unlocked. Doing this will trip the knox counter to 1 and void any remaining warranty.

I tried to downgrade, but it didnt take. I will try again. I know there was a discussion on booting the phone and not signing into google then reflash again. Is this needed?
Thanks for the reply.

Well, I got it to work this time. Much appreciated

You tried to flash a stock 4.4.2 rom from sammobile.com? Were there errors in Odin?

S4 i9507 Flashing + CSC

So my S6 had an unfortunate trip in the lake, and I'm going to resort to my sisters old S4 (I owned one too, but I totalled it).
Mine was rooted and had GPE loaded on it.
My old model was an i9505 and noticed that my sisters is a i9507 which is a strange variant (assuming its 4G+).
Anyway, when she had it, the phone constantly overheated and would constantly reboot. We returned for repair many times, each time showing no signs of issue.
What I would like to know is;
Would i9505 roms suit this phone? Or would I have to make do with stock.
And secondly, I am with telstra and the S4 is with virgin (OPS). Is it as simple as flashing a i9507 ROM from telsra on it, or do I have to do something else? This is for the CSC of course.

Is the phone sim unlocked? I recommend sim unlocking the phone before flashing any ROMs, especially custom ROMs as the unlock code needs to be entered using a stock Samsung dialler.
CSC doesn't really matter if the phone is sim unlocked.
Stock firmware is here: http://www.sammobile.com/firmwares/database/GT-I9507/

audit13 said:
Is the phone sim unlocked? I recommend sim unlocking the phone before flashing any ROMs, especially custom ROMs as the unlock code needs to be entered using a stock Samsung dialler.
CSC doesn't really matter if the phone is sim unlocked.
Stock firmware is here: http://www.sammobile.com/firmwares/database/GT-I9507/
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Hmm stock firmware is only 5.0.1 and not for the carrier that I want. It's been so long since I've modded (since I've had stock S6 since I bought it). Can I change the CSC on that rom, or would it be locked to Optus.
Anyway I've put in my Telstra sim and it seems to work for the moment, picking up the telstra network and changing the APN's to telstras (maybe there is a CSC in the phone for TEL too?).
Just would like to know now if I'm able to use a GEL or AOSP rom for the i9505.
Thanks for the response.

The firmware should not matter. The CSC files are a customization of app for a particular carrier. There are 3 carriers in Canada (Rogers, Bell, Telus) for the s4 and I can cross-flash the firmware with no problems. I would be surprised if the phone can't work with Telstra if it is unlocked.
According to these specs, the 9507 uses a snapdragon 600 chip which is the chip used in the i337m and 9505: http://www.gsmarena.com/samsung_i9507_galaxy_s4_with_s600_spotted_in_glbench-news-6571.php

Is it possible to flash a stock N910T ROM to N910W8? No difference in hardware.

Currently have a stock N910W8 (Unlocked, Telstra branding), thinking it would be a direct unlocked replacement for my N910T (T-Mobile USA SIM). However the N910W8 can't get 4GLTE no matter how many adjustments I make to the APN
The model number printed in the battery slot is the same, N910T. I thought this would be an easy switch.
I tried flashing the stock N910T firmware via ODIN but was unsuccesful. Kept getting a secure check fail about error using stock N910T DOK2 BL/CP and N910T EPK firmware. Do I not have the right versions?
Is there any other way to do this through ODIN without installing a recovery and rooting? Is it even possible?

igwa said:
Currently have a stock N910W8 (Unlocked, Telstra branding), thinking it would be a direct unlocked replacement for my N910T (T-Mobile USA SIM). However the N910W8 can't get 4GLTE no matter how many adjustments I make to the APN
The model number printed in the battery slot is the same, N910T. I thought this would be an easy switch.
I tried flashing the stock N910T firmware via ODIN but was unsuccesful. Kept getting a secure check fail about error using stock N910T DOK2 BL/CP and N910T EPK firmware. Do I not have the right versions?
Is there any other way to do this through ODIN without installing a recovery and rooting? Is it even possible?
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Without root its impossible.
You need a modified custom rom from n910t that is compatible with n910w8.
in order to do that you need root and twrp recovery installed.
I beleive LTE bands are different in both models even if you flash n910t rom not sure you will get LTE.
And for wifi calling you will require N910T modem and with N910W8 its not compatible.

Trex888 said:
Without root its impossible.
You need a modified custom rom from n910t that is compatible with n910w8.
in order to do that you need root and twrp recovery installed.
I beleive LTE bands are different in both models even if you flash n910t rom not sure you will get LTE.
And for wifi calling you will require N910T modem and with N910W8 its not compatible.
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WiFi calling I can deal without, LTE I cant.
Just throwing it out there, why can't one flash N910T firmware on an N910TW8? The hardware between an N910W8 model is literally no different, the model number on the sticker of the N910W8 is N910T. It's not like I'm expecting N910T firmware to run on a Verizon or Sprint model.
There has to be some method to essentially brick a N910W8, removing all trace of N910W8 firmware, CP/CSC/BL data, then install N910T firmware and have it wake up in N910T hardware. Anyone?

igwa said:
WiFi calling I can deal without, LTE I cant.
Just throwing it out there, why can't one flash N910T firmware on an N910TW8? The hardware between an N910W8 model is literally no different, the model number on the sticker of the N910W8 is N910T. It's not like I'm expecting N910T firmware to run on a Verizon or Sprint model.
There has to be some method to essentially brick a N910W8, removing all trace of N910W8 firmware, CP/CSC/BL data, then install N910T firmware and have it wake up in N910T hardware. Anyone?
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I flashed a few diffrent t mobile roms to my Canadian variant I found just the opposite, I had better LTE coverage with the T-Mobile rom and not so much with the stock n910w8...inless of course you are in fact in Canada...trick is you nead to fined a compatible kernel. ..i beleve its a Nadia kernel. ..spelling mite be wrong but i think thats it

trinilu27 said:
I flashed flashed a few diffrent t mobile to my Canadian variant I found just the opposite I had better LTE coverage with the T-Mobile rom and not so much with the stock n910w8...inless of course you are in fact in Canada...trick is you nead to fined a compatible kernel. ..i beleve its a Nadia kernel. ..spelling mite be wrong but i think thats it
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Were you able to flash the Stock T-Mobile ROM to the W8 or did you have to root? I'm in the US and even after playing with all the settings the max Down/Up speeds I saw were 2Mbps/0.1Mbps on the Telstra N910W8, compared to my previous 50Mbps/50Mbps on the Tmo N910T.

No you will have to root....easy just flast team win with odin....then download su.zip and flash with your new recovery......why wouldnt you want to root?.......hell i still have my n910w8 motherboard rooted with custem rom if you interested in an extra. ..hope i dont get in trouble for saying that

I prefer to keep it unrooted for the OTA updates. Don't get that with root, updating would just be one more thing to keep up with.

Yes but me personally, like to update when i want to not when they decided i have postponed the update long enough and the next thing you know ur phones updated and u didnt get to have a say in it...but thats just me....not to mention first thing after root is removing all the blot and stupid apps ill never use...back ups are a life saver...iv bricked a device 6 or 7 times in a 12 hour period. ...

1. What about flashing the N910T PIT file along with the PDA, CSC, BL, and CP files for the N910T? What will stop this from succeeding?
2. What about a JTAG service?
3. Is there a differencertain between what ODIN does and using an unbrick image from a N910t from the SD card after a hard brick?
Open to anything at this point, except of course, using a 910TW8 firmware on 910T hardware which is all this is.

igwa said:
Were you able to flash the Stock T-Mobile ROM to the W8 or did you have to root? I'm in the US and even after playing with all the settings the max Down/Up speeds I saw were 2Mbps/0.1Mbps on the Telstra N910W8, compared to my previous 50Mbps/50Mbps on the Tmo N910T.
Click to expand...
Click to collapse
I did not flash stock t mobile ...i flashed a few custom t mobile roms...and thinking about it now i beleve there is a way to flash with out root useing ADB...so maybe look into that