So I am new to GSM phones anyway but I just got an AT&T GSIII and I am using it on T-Mobile. I am a Sprint user initially (rooted Gnexus) and testing T-Mobile in an area I frequent to compare if it is worth switching.
My questions is I am already downloading the root kit and ready to run a ROM but should I use a T-Mobile Rom or an AT&T Rom. Also not sure if I should be asking this in the AT&T general section. Any advice would be great.
Any help is greatly appreciated. Thank you in advance!
The T-Mobile Roms for the GSIII should work on AT&T. That's what i heard. And the kernels too btw.
re: flashing roms
latinmaxima said:
So I am new to GSM phones anyway but I just got an AT&T GSIII and I am using it on T-Mobile. I am a Sprint user initially (rooted Gnexus) and testing T-Mobile in an area I frequent to compare if it is worth switching.
My questions is I am already downloading the root kit and ready to run a ROM but should I use a T-Mobile Rom or an AT&T Rom. Also not sure if I should be asking this in the AT&T general section. Any advice would be great.
Any help is greatly appreciated. Thank you in advance!
Click to expand...
Click to collapse
If you are on the tmobile network, flash tmobile roms, if you are on the at&t network flash AT&T roms for best results.
Just be sure that if your phone is an AT&T I747 Galaxy S3 even if it's unlocked only flash AT&T modems/radios and
if your phone is an T999 Tmobile S3 never flash a AT&T modem/radio but only flash T999 Tmobile modem/radios.
Misterjunky said:
If you are on the tmobile network, flash tmobile roms, if you are on the at&t network flash AT&T roms for best results.
Just be sure that if your phone is an AT&T I747 Galaxy S3 even if it's unlocked only flash AT&T modems/radios and
if your phone is an T999 Tmobile S3 never flash a AT&T modem/radio but only flash T999 Tmobile modem/radios.
Click to expand...
Click to collapse
So I am safe to flash any t-mobile rom as long as I avoid the radios? What is this multi carrier stuff I have read? Sorry still reading the forums before really leaping into the root and flashing.
I would really like to go PA and TWRP as that is what I am most familiar with.
Thanks for the responses.
re: flashing
latinmaxima said:
So I am safe to flash any t-mobile rom as long as I avoid the radios? What is this multi carrier stuff I have read? Sorry still reading the forums before really leaping into the root and flashing.
I would really like to go PA and TWRP as that is what I am most familiar with.
Thanks for the responses.
Click to expand...
Click to collapse
Multi-Carrier will flash either of the phones, AT&T I747 or Tmobile T999, the rom installer will automatically
detect which phone you have and flash the proper rom. These multi-carrier roms are all custom roms which
require your phone to be rooted and have TWRP/CWM recovery installed.
As long as you never use Odin for flashing and always use CWM or TWRP when you flash roms you will never
have to worry about flashing /radios modems, or flashing the wrong one.
All the custom roms found here in XDA do not come with the modem/radio images but instead they use the
modem/radio image which is already in your phone.
If you want to flash any custom roms you will have to root the phone and install twrp or cwm recovery first.
Without doing that you can only flash stock roms which require the Odin windows software.
Good luck!
Please read forum rules before posting
Questions and help issues go in Q&A
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator
I unlocked a Galaxy S4 SGH-I337 FROM ATT I am using Tmobile services.
My question is can I install a Stock ROM from TMobile instead of having the ATT one?
I like the Wifi Calling and Tethering option.
I can tell you... But I have a LOT of readers who want to know how to do what you have already done! How did you SIM unlock your SGH-I337? There is a published method for AT&T and TMo that seems to no longer work on the AT&T variant.
OK.. I won't hold you hostage, but I really would like to know!
For the flash to stock, just head over here http://forum.xda-developers.com/showthread.php?t=2267895
Follow the instructions and that will re-flash T-Mobile stock everything.
Sent from my SGH-M919 using Tapatalk
mhannigan said:
I can tell you... But I have a LOT of readers who want to know how to do what you have already done! How did you SIM unlock your SGH-I337? There is a published method for AT&T and TMo that seems to no longer work on the AT&T variant.
OK.. I won't hold you hostage, but I really would like to know!
For the flash to stock, just head over here http://forum.xda-developers.com/showthread.php?t=2267895
Follow the instructions and that will re-flash T-Mobile stock everything.
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Are u sure u can directly odin flash tmo stock unto i337?
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
sharpeyedman said:
Are u sure u can directly odin flash tmo stock unto i337?
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
Yes. But also check this thread. The AT&T boot loader is locked and may require Loki Doki patch when you are done.
http://forum.xda-developers.com/showthread.php?t=2295557
Sent from my SGH-M919 using Tapatalk
mhannigan said:
Yes. But also check this thread. The AT&T boot loader is locked and may require Loki Doki patch when you are done.
http://forum.xda-developers.com/showthread.php?t=2295557
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
.... I may be wrong here, but since when has it been OK to Odin different carrier's stock .tars? Flashable CWM zips yes, but the bone stock tar with modem, baseband, etc?
Also, being that you have TMO service and an ATT device; flashing a TMO ROM with WiFi calling should work; just use an ATT kernel and the Loki patch. Personally, I'd flash the rooted stock MDL or a custom TouchWiz via CWM or whatever recovery you happen to use and not use Odin.
lordcheeto03 said:
.... I may be wrong here, but since when has it been OK to Odin different carrier's stock .tars? Flashable CWM zips yes, but the bone stock tar with modem, baseband, etc?
Also, being that you have TMO service and an ATT device; flashing a TMO ROM with WiFi calling should work; just use an ATT kernel and the Loki patch. Personally, I'd flash the rooted stock MDL or a custom TouchWiz via CWM or whatever recovery you happen to use and not use Odin.
Click to expand...
Click to collapse
Since wjenmisnit OK to do it differently?
It is only OK to do when you know what you are doing. In this case the hardware is absolutely identical. You're not going to be using AT&Ts baseband firmware on the T-Mobile network are you? Good luck with that.
Mike
Sent from my SGH-M919 using Tapatalk
---------- Post added at 12:24 AM ---------- Previous post was at 12:17 AM ----------
lordcheeto03 said:
.... I may be wrong here, but since when has it been OK to Odin different carrier's stock .tars? Flashable CWM zips yes, but the bone stock tar with modem, baseband, etc?
Also, being that you have TMO service and an ATT device; flashing a TMO ROM with WiFi calling should work; just use an ATT kernel and the Loki patch. Personally, I'd flash the rooted stock MDL or a custom TouchWiz via CWM or whatever recovery you happen to use and not use Odin.
Click to expand...
Click to collapse
MDL baseband is the modem firmware
Sent from my SGH-M919 using Tapatalk
i have the i337 ATT and I am using a Tmobile sim card. Just youtube "unlock galaxy s4 AT&T". There are plenty of videos that use a secret menu to unlock the phone.
Free and instant
I also have AT&T i337 unlocked BUT
I also have AT&T i337 unlocked BUT when I try to use it with MetroPCS (same tower as T-Mobile - companies now merged) I can't get anything but Edge network where on my MetroPCS-supplied phone I get 4G (LTE only rarely) in the same areas. Edge network is ridiculous - can't even load a standard webpage- forget about watching a video! ookla =0.01mps!
So I have an unusable rooted, unlocked S4.
I've tried various APN settings to no avail... Thought I would try liquidsmooth ROM, or any ROM that works on both AT&T and T-Mobile... I assume T-Mobile /MetroPCS would react the same. And I am on a pay as you go plan that is similar to T-Mobile's s. I could easily switch to them if not...
Questions:
Has anyone any advice that could help?
Does anyone know if T-Mobile requires a "pairing" of sim card with phone's IMEI as MetroPCS does? (big pain in the butt)
I've done the same thing flashed roms, Modems, To my luck nothing, I did filing that since I repaired the imei, That is when the problem started. Also to does not tie imei to sims. Did you repair imei
Sent from my SGH-M919 using xda premium
Easy free Sim unlock
Just wanted to point out that if you know someone who has AT&T service they can unlock your phone for free My girlfriend did it for me on their website and it took 24 hours for them to send an email with the unlock code. Just thought i should share that. Up next getting this t-mobile rom onto my 32gb i337 at 4.4.2 with NB1. I hate everything AT&T and God is this phone bloated!
Wanabedev83 said:
Just wanted to point out that if you know someone who has AT&T service they can unlock your phone for free My girlfriend did it for me on their website and it took 24 hours for them to send an email with the unlock code. Just thought i should share that. Up next getting this t-mobile rom onto my 32gb i337 at 4.4.2 with NB1. I hate everything AT&T and God is this phone bloated!
Click to expand...
Click to collapse
Don't they have to be the owner to request an unlock?
Sent from my SGH-M919 using Tapatalk
serio22 said:
Don't they have to be the owner to request an unlock?
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
To be honest i can't answer your question. The phone i bought was from a guy who sold it to me out of eBay with a none working screen, he had the imei in the pics so i ran an imei blacklist check and it was clean. I asked him why he didn't fix it and said it was out of warranty so he just left it dead. I guess it was paid for but in his account so it was free for anyone to use but letting my girl do the unlock request worked so if you have a phone that's not blacklisted and you its not associated to an active account I guess it could be done. Try it, it's worth the try.
Similar question
Very first post, not sure if I should have started a new thread. Anyway, I have an ATT S4 I337 with the MF3 baseband. It's rooted, region unlocked, and fully switched to t-mobile service using a method I found on youtube, which worked fairly well except had to modify two things (I can help if you're having trouble). Now I'd like to upgrade firmware (I'm still on 4.2.2). However, I have a lot of uncertainty because of all the changes I've made. If I temporarily unroot, who am I going to get updates from? Do I need TMO or ATT custom ROMs if I want custom (have they solved that bootloader issue yet?). Basically, what's the safest way to update firmware?
Thanks in advance
mhannigan said:
Since wjenmisnit OK to do it differently?
It is only OK to do when you know what you are doing. In this case the hardware is absolutely identical. You're not going to be using AT&Ts baseband firmware on the T-Mobile network are you? Good luck with that.
Mike
Sent from my SGH-M919 using Tapatalk
---------- Post added at 12:24 AM ---------- Previous post was at 12:17 AM ----------
MDL baseband is the modem firmware
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
The above also omits that if you are on Android 4.3.X than the bootloader on your Samsung Galaxy S4 contains a bootloader restriction preventing any downgrade which means you would be unable to flash MDL (ie. M919UVUAMDL) since MDL is Android 4.2.2.
Does anyone know a way around this bootloader restriction thereby allowing a downgrade to 4.2.2?
att i337 to t-mob stock
Hi, Im pretty new to this firmware and different model numbers etc.. but here goes. I bought a samsung s4 on att i337 a few months ago off a friend. I paid an online company for the unlock code and received the code within 24 hours. The phone is now unlocked and I have a T-mob sim in it, i'm now looking to update the firmware to t-mobile 4.4.4. Can i download a t-mob stock rom for i337?? I'm worried that this might break the phone as everything I see for t-mob is SGH-M919. Should this matter now that the phone is unlocked?? Thanks
No, you need to use ATT firmware due to hardware differences (antenna/radio). Also as I recall ATT S4s have a locked bootloader meaning only safestrap compatible ROMs can be used, unless something changed since I had one last summer. Sold it, on Swappa, and bought a TMob version with unlocked boot loader and sim unlocked!
Sent from my SGH-M919 using Tapatalk
mfranklin90 said:
Very first post, not sure if I should have started a new thread. Anyway, I have an ATT S4 I337 with the MF3 baseband. It's rooted, region unlocked, and fully switched to t-mobile service using a method I found on youtube, which worked fairly well except had to modify two things (I can help if you're having trouble). Now I'd like to upgrade firmware (I'm still on 4.2.2). However, I have a lot of uncertainty because of all the changes I've made. If I temporarily unroot, who am I going to get updates from? Do I need TMO or ATT custom ROMs if I want custom (have they solved that bootloader issue yet?). Basically, what's the safest way to update firmware?
Thanks in advance
Click to expand...
Click to collapse
Hi! I am having major issues with my s4 i337 after switching from att to tmobile. The phone was unlocked so I took it upon myself to unlock it. It is unlocked but sometimes or rather most of the time does not pick up the network. When it does have data connection, it is Edge. I flashed the NC1 to root my phone, then reflashed to NJ4 (to unlock) but now nothing works. No wifi, camera fails, no multitasker, no voice assistant. Please help!!!!! I don't know what to do. I should have never unrooted it to unlock. I should have paid the $35 to get an unlock code. Can I fix this?
vannicuhh said:
Hi! I am having major issues with my s4 i337 after switching from att to tmobile. The phone was unlocked so I took it upon myself to unlock it. It is unlocked but sometimes or rather most of the time does not pick up the network. When it does have data connection, it is Edge. I flashed the NC1 to root my phone, then reflashed to NJ4 (to unlock) but now nothing works. No wifi, camera fails, no multitasker, no voice assistant. Please help!!!!! I don't know what to do. I should have never unrooted it to unlock. I should have paid the $35 to get an unlock code. Can I fix this?
Click to expand...
Click to collapse
Have you flashed the full firmware?
serio22 said:
Have you flashed the full firmware?
Click to expand...
Click to collapse
I am not sure. I flashed NB1 as suggested by another forum member and everything is working once again. Although it went back to 4.4.2.
Now it has this notification : security notice: unauthorized actions have been detected. It wants me to reboot to revert the changes. How do I make this go away and will it go back to its unusable mode if I manually reboot?
Sent from my SAMSUNG-SGH-I337 using xda Forum
YES
TTAHER said:
I unlocked a Galaxy S4 SGH-I337 FROM ATT I am using Tmobile services.
My question is can I install a Stock ROM from TMobile instead of having the ATT one?
I like the Wifi Calling and Tethering option.
Click to expand...
Click to collapse
i have samsung galaxy s7 edge att unlocked with tmobile sim card and my last 2 ota upgrade are from tmobile G935TUVU4APK1
Hello all,
Sorry if this was asked before but i couldnt find it in the search as its coming up with numerous returns on something else.
Anyways, I bought an AT&T s3 rooted and i was able to put it back to stock with Android 4.0.4. After i put it back to stock i got it unlocked to use on T-Mobile.
My questions are,
how do i update the software to the latest version. do i update it with AT&T software or do i use the T-Mobile software version?
If I update it again will it get locked again?
Rooting is not really an option as it is for my daughters use
thank you in advance for any replies,
V
chedview tribes
vreyes said:
Hello all,
Sorry if this was asked before but i couldnt find it in the search as its coming up with numerous returns on something else.
Anyways, I bought an AT&T s3 rooted and i was able to put it back to stock with Android 4.0.4. After i put it back to stock i got it unlocked to use on T-Mobile.
My questions are,
how do i update the software to the latest version. do i update it with AT&T software or do i use the T-Mobile software version?
If I update it again will it get locked again?
Rooting is not really an option as it is for my daughters use
thank you in advance for any replies,
V
Click to expand...
Click to collapse
Once your phone is unlocked, it stays unlocked always even after firmware upgrades. If the phone is rooted, it means you can install custom firmware. If you want to stay on stock, however, you should stick to the AT&T versions. With a valid AT&T sim and as long as the IMEI is clean, you should be able to get OTA upgrade to the latest version (currently 4.3) via WiFi. I didn't have any problem doing this on my unlocked AT&T even with an unfunded albeit valid sim.
You can't install a custom ROM just by having root. You need to have a custom recovery installed in order to install a custom ROM.
Look under About Phone to determine whether the phone is identified as an i747 or t999.
thanks for the replies.
I know how to root a phone but I dont want it to be rooted as its for my daughter. thanks.
@audit13 - model # shows samsung-sgh-1747, so should i update it with AT&T software even though i am going to use it on T-Mobile.
thanks
vreyes said:
thanks for the replies.
I know how to root a phone but I dont want it to be rooted as its for my daughter. thanks.
@audit13 - model # shows samsung-sgh-1747, so should i update it with AT&T software even though i am going to use it on T-Mobile.
thanks
Click to expand...
Click to collapse
Is it running stock AT&T software? If it is, you can update it but you may not get 3g data on the phone without enabling aws.
audit13 said:
Is it running stock AT&T software? If it is, you can update it but you may not get 3g data on the phone without enabling aws.
Click to expand...
Click to collapse
Yes it is stock on android 4.0.4. what is aws and what do i need to enable it? thanks
Do you have a data plan with T-Mobile? If you are not in an area with T-Mobile's 4G, you may one get Edge unless you enable the 1700 mhz band on the phone.
http://forum.xda-developers.com/showthread.php?t=1771021
audit13 said:
Do you have a data plan with T-Mobile? If you are not in an area with T-Mobile's 4G, you may one get Edge unless you enable the 1700 mhz band on the phone.
http://forum.xda-developers.com/showthread.php?t=1771021
Click to expand...
Click to collapse
yes i have data plan on TMO. ok thanks i will look into it.
vreyes said:
yes i have data plan on TMO. ok thanks i will look into it.
Click to expand...
Click to collapse
If I recall correctly it is around page 28 or so there is a post by tmokeith that has everything you would need to enable the 1700mhz aws wcdma band. There is some risk involved so please read, read and read it again.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
ok thanks for all the replies
I have read a bit and can't find a definite answer. I am going to pick up a att note 3 tomorrow that's been unlocked. Guy says he uses it on tmobile fine but my question is in terms of installing custom ROMs, how should I go about installing a tmobile version? I have read where people get better reception using tmobile ROMs but am uncertain about how and what to do. I know how to flash etc but also never messed with att phones on tmobile.
Do you guys that are running an att version do any extra steps or? Do you flash Tmobile radios?
Any help is appreciated.
re: AT&T Note 3
Ducter said:
I have read a bit and can't find a definite answer. I am going to pick up a att note 3 tomorrow that's been unlocked. Guy says he uses it on tmobile fine but my question is in terms of installing custom ROMs, how should I go about installing a tmobile version? I have read where people get better reception using tmobile ROMs but am uncertain about how and what to do. I know how to flash etc but also never messed with att phones on tmobile.
Do you guys that are running an att version do any extra steps or? Do you flash Tmobile radios?
Any help is appreciated.
Click to expand...
Click to collapse
It's too bad that you got the AT&T model phone instead of the Tmobile.
You will not be able to have the wifi calling feature (perhaps you don't need it)
Also the AT&T Note 3 requires "safestrap" before you can flash custom recovery,
roms, kernels or anything else which requires custom recovery (TWRP/CWM).
Here is a link which explains Safestrap and instructions on how to install it on
the AT&T note 3 phones: http://forum.xda-developers.com/showthread.php?t=2572978
Good luck!
Misterjunky said:
It's too bad that you got the AT&T model phone instead of the Tmobile.
You will not be able to have the wifi calling feature (perhaps you don't need it)
Also the AT&T Note 3 requires "safestrap" before you can flash custom recovery,
roms, kernels or anything else which requires custom recovery (TWRP/CWM).
Here is a link which explains Safestrap and instructions on how to install it on
the AT&T note 3 phones: http://forum.xda-developers.com/showthread.php?t=2572978
Good luck!
Click to expand...
Click to collapse
Thanks for the information.
I just got an Unlocked T-Mobile LG G3 that I use on AT&T. It's running 4.4.2 still. I'm looking to root it and install custom recovery and ROM on it. My question is since its the D851 then I have to use the T-Mobile forums to get the correct root and everything. Right? Also, will I still be unlocked so I can put my AT&T sim in it or does it destroy it? Also since I have 4.4.2 and try to install a ROM that's 5.0 or 5.0.2 will it softbrick the pone? Thanks for any input. It's m;y first Unlocked phone.
Yes you would use the T-Mobile forums since you purchased it from T-Mobile.
I don't see how rooting would destroy the unlocking of the device.
Sent from my iPhone 6 128GB SG using Tapatalk
DudeThatsErin said:
Yes you would use the T-Mobile forums since you purchased it from T-Mobile.
I don't see how rooting would destroy the unlocking of the device.
Sent from my iPhone 6 128GB SG using Tapatalk
Click to expand...
Click to collapse
mine is unlocked and i use it on att and you wont loose unlock
Because of the hardware, yes, you will need to flash ROMs written for the D851, not AT&T. However you will need to manually setup the APN information for AT&T as it won't be in the ROMs.
kflynn2732 said:
I just got an Unlocked T-Mobile LG G3 that I use on AT&T. It's running 4.4.2 still. I'm looking to root it and install custom recovery and ROM on it. My question is since its the D851 then I have to use the T-Mobile forums to get the correct root and everything. Right? Also, will I still be unlocked so I can put my AT&T sim in it or does it destroy it? Also since I have 4.4.2 and try to install a ROM that's 5.0 or 5.0.2 will it softbrick the pone? Thanks for any input. It's m;y first Unlocked phone.
Click to expand...
Click to collapse
Everyone answered your question but the last one so ill answer it. You could definitely flash any lollipop ROM so long as its made for D851. If it does not say D851 on it then do not flash it. We currently do not have a Stock lollipop rom so keep that in mind. However, feel free to root and then flash any cm12, aosp lollipop rom in the dev sections. Just READ carefully tho. A lot of people brick their devices because they refuse to read directions.