Develop Bugs

[Q] Best Rom option for running AT&T phone on T-Mobile

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!

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[Q] SGH-i747M rom on SGH-i747

Hey guys.. I'm new to this forum and to flashing ROMs and all that so I need your help..
I used the search option and didn't find a clear answer to this..
I have bought about a month ago an at&t SGS3 SGH-i747 and I am not very happy with the current OS (android 4.1.1 at&t stock ROM) and I want to upgrade it to 4.1.2. After searching google a bit i found out that there IS an official 4.1.2 android from at&t for my device and wherever I go they say to go to settings, about device, software update and update my phone from there but it says that there is no update.
I have searched for a ROM on sammobile and only found a 4.0.4 ROM for my phone.
However, I found out that there is a 4.1.2 ROM for SGS3 SGH-i747M, and some people say that their ROMs will work on my device and some say they won't.
Can someone tell me, if I install a Rogers (for example) i747M ROM on my device will it work without problem? I don't want to stay with the at&t ROM because it has too many limitations on them.
I prefer not to install custom ROMs because they are all a bit unstable..
Sorry if I have bad English, tried my best..

First off an (att) rom will work with a (rogers) phone. I'm using one right now.
Secondly, if you do manage to install a (rogers) rom on your s3 it will probably be missing apn settings and you'll have rogers apps.
Lastly, through my experience with custom roms, I have found that they are far more stable then stock, if you're looking for a good custom touchwiz rom. Look at hyperdrive

ChaosG said:
Hey guys.. I'm new to this forum and to flashing ROMs and all that so I need your help..
I used the search option and didn't find a clear answer to this..
I have bought about a month ago an at&t SGS3 SGH-i747 and I am not very happy with the current OS (android 4.1.1 at&t stock ROM) and I want to upgrade it to 4.1.2. After searching google a bit i found out that there IS an official 4.1.2 android from at&t for my device and wherever I go they say to go to settings, about device, software update and update my phone from there but it says that there is no update.
I have searched for a ROM on sammobile and only found a 4.0.4 ROM for my phone.
However, I found out that there is a 4.1.2 ROM for SGS3 SGH-i747M, and some people say that their ROMs will work on my device and some say they won't.
Can someone tell me, if I install a Rogers (for example) i747M ROM on my device will it work without problem? I don't want to stay with the at&t ROM because it has too many limitations on them.
I prefer not to install custom ROMs because they are all a bit unstable..
Sorry if I have bad English, tried my best..
Click to expand...
Click to collapse
What you are describing on Sammobile are the stock firmwares that are flashed through a program called Odin. If you tried flashing a Rogers image, you could potentially brick your phone, or as the user above said, there would be a lot of issues since that is not the firmware for AT&T. Are you rooted? If you are, that is what is causing the upgrade issue, since you have to be 100% stock.

dbaler said:
First off an (att) rom will work with a (rogers) phone. I'm using one right now.
Secondly, if you do manage to install a (rogers) rom on your s3 it will probably be missing apn settings and you'll have rogers apps.
Lastly, through my experience with custom roms, I have found that they are far more stable then stock, if you're looking for a good custom touchwiz rom. Look at hyperdrive
Click to expand...
Click to collapse
Thanks for your answer. Well, if you say that custom roms are more stable than stock, I won't argue. Just some friends told me otherwise.
I'll try to find a good rom that suits me.
Btw, I don't care if ill have Rogers apps or AT&T apps, they are both useless to me. I just don't want to brick my phone.
drx895 said:
What you are describing on Sammobile are the stock firmwares that are flashed through a program called Odin. If you tried flashing a Rogers image, you could potentially brick your phone, or as the user above said, there would be a lot of issues since that is not the firmware for AT&T. Are you rooted? If you are, that is what is causing the upgrade issue, since you have to be 100% stock.
Click to expand...
Click to collapse
I didn't flash a Rogers rom because I couldn't find a clear answer that says that it will not brick my phone. I just seen some people ask about it and didn't get an answer either. I have tried to unroot and flash a stock rom from "samsung-updates.com", a 4.1.1. Its the same as the one that I already had. Still, no update available.

ChaosG said:
Thanks for your answer. Well, if you say that custom roms are more stable than stock, I won't argue. Just some friends told me otherwise.
I'll try to find a good rom that suits me.
Btw, I don't care if ill have Rogers apps or AT&T apps, they are both useless to me. I just don't want to brick my phone.
I didn't flash a Rogers rom because I couldn't find a clear answer that says that it will not brick my phone. I just seen some people ask about it and didn't get an answer either. I have tried to unroot and flash a stock rom from "samsung-updates.com", a 4.1.1. Its the same as the one that I already had. Still, no update available.
Click to expand...
Click to collapse
If you flash a ODIN package for rogers on an AT&T phone you may brick it due to bootloader and modem
if you flash a custom zip based on an AT&T rom from XDA you won't brick since they don't contain bootloader or a modem
hope this helps

How to Update Android on Unlocked AT&T S3 I747 for MetroPCS/TMobile

Hey guys so I decide to get the SGH-147 AT&T S3 off of ebay for MetroPCS which enabled me to get a 2 year squaretrade warranty. After looking back at it now, I feel it might have been a bad idea since Metro has a MIR 349.99 deal for their S3 version which would mean easier android update since it would be on Metro servers if I'm not mistaken. Anyway I can't return the ebay phone now unless there is some software or hardware problems within 30 days
So my problem
I am stuck on 4.1.1 on Kies and when I check for update, because the phone is based on AT&T servers, it won't work since I'm on Metro. I wanted to see if there is anyway for me to update my phone to 4.3 which is the current version. Although, I've heard some people have 4.3 problems?
If that's not advisable, could y'all tell me how I could atleast get to Android 4.1.2? Also is there a 4.4 update in the works?
I just got the phone today and would like to be running on something better than 4.1.1
should I flash the AT&T phone to a MetroPCS ROM lol, if any of those are actually available, or if I were to flash, should I flash it to Tmobile?

First off, if its I747, you MUST flash only those Roms. No others. Now, that's indeed a nice phone with LTE Antenna.
You really heard correct. The 4.3 upgrade from the carrier (ATT for you) /Samsung has a lot of issues. I wouldn't do it for any reason. Particularly on T-Mo network, you will have severe signal issues as reported by others. In addition, it now flashes an EFuse onto your phone along with locked bootloader and other scary stuff.I really would not do it.
Lastly, XDA is organized by devices. So even though you are a T-Mo/Metro PCS customer, you will have to post on AT&T SGS3 forum over there.
Speaking of Rom update, Please visit Root66 Thread for this device. You will find Rooted version of your Current Rom. Dunno why but he does not have 4.2.x for you. Please do your research someone else must have posted it.
Now speaking to 4.3, yes there is a way to get 4.3 on your phone without the issues I mentioned above. But first you will have to flash a Custom recovery such as CWM or TWRP with the help of ODIN on your phone. Again do your research well. Once those are in place, take a look at this thread. It will provide 4.3 experience without ANY concerns or issues. Read it carefully and then read some more. Good Luck.

Perseus71 said:
First off, if its I747, you MUST flash only those Roms. No others. Now, that's indeed a nice phone with LTE Antenna.
You really heard correct. The 4.3 upgrade from the carrier (ATT for you) /Samsung has a lot of issues. I wouldn't do it for any reason. Particularly on T-Mo network, you will have severe signal issues as reported by others. In addition, it now flashes an EFuse onto your phone along with locked bootloader and other scary stuff.I really would not do it.
Lastly, XDA is organized by devices. So even though you are a T-Mo/Metro PCS customer, you will have to post on AT&T SGS3 forum over there.
Speaking of Rom update, Please visit Root66 Thread for this device. You will find Rooted version of your Current Rom. Dunno why but he does not have 4.2.x for you. Please do your research someone else must have posted it.
Now speaking to 4.3, yes there is a way to get 4.3 on your phone without the issues I mentioned above. But first you will have to flash a Custom recovery such as CWM or TWRP with the help of ODIN on your phone. Again do your research well. Once those are in place, take a look at this thread. It will provide 4.3 experience without ANY concerns or issues. Read it carefully and then read some more. Good Luck.
Click to expand...
Click to collapse
THANK YOU! Looks like I got a lot of phone work to do over the weekend. SO do you think it was good/should I stick with this AT&T S3 or should I try to sell it for a discount and buy a Metro PCS S3? The ebay buyer won't take my phone back unless there is a hardware or software problem inherent to phone...unless I fake one ?

If it was me, I'd keep the phone. Metro's S3 does not have LTE Antenna. You'd have been stuck at lower speeds.

Perseus71 said:
If it was me, I'd keep the phone. Metro's S3 does not have LTE Antenna. You'd have been stuck at lower speeds.
Click to expand...
Click to collapse
Metro's s3 does have lte
As for the OP you can flash at&t or T-Mobile ROMs it really doesn't matter because they are backwards compatible (I have done it) and you can flash 4.3 ROMs if you don't want to take the official 4.3 update which you can easily do with Odin without the need for kies or ota.. Now, I suggest the first thing you do is flash a custom recovery and then experiment with 4.3 ROMs, if you keep having problems flash 4.1.2 roms.. There are some things you need to do though to get 4.3 up and running so I suggest you read up on it first. Good luck my friend!
Sent from my SGH-M919 using Tapatalk

It was my impression he wanted Stock Touchwiz Roms not AOSP.
Thanks for letting me know Metro has T999L

Perseus71 said:
It was my impression he wanted Stock Touchwiz Roms not AOSP.
Thanks for letting me know Metro has T999L
Click to expand...
Click to collapse
I did mean touchwiz ROMs.. And the metro model is t999n which is pretty much a t999l
Sent from my SGH-M919 using Tapatalk

Help with AT&T S3 in Canada PLEASE!!!

Hey guys how are you all today? I have a quick question... I have rooted and installed MANY custom Roms on MANY different devices.... but never came across this problem yet. I live in Canada and I recently purchased yet another S3, but it is a US model i747 from AT&T.... now my question is, can I install stock rooted Bell or Rogers firmware on the device? Im currently running CM11 and it is a great ROM, however, when I had my S4 I was running Foxhound ROM and loved it as it was the best of both worlds. Now I would like to go back to a stock rooted ROM and use Xposed Framework so I can keep the stock Touchwiz functions, but would like to customize it to give it the AOSP look. So, am I able to flash stock rooted Bell firmware on an AT&T deviceÉ I know this is a newbie question but ive never owned a US device before so I never encountered this problem. Thank you all in advance for helping me clarify this.... Ive tried searching but didnt come up with a solid answer through search. Thanks again.
Jeff

Anybody

Do you have the 4.3 bootloader on your phone? If you do, flashing an older bootloader will brick the phone.
I would not try to flash a stock Canadian ROM as that may also brick your phone because the Canadian and US models appear to use different bootloaders.

Thank you for the reply dude.... no Im running cm11 4.4.2 but on MG2 bootloader... if this helps? I just figured that since the devices are basically the same and you can flash the same custom ROMS that you could POSSIBLY flash stock rooted ROMS from either country as well. You think its possible? Thanks again in advance for the reply!!
Jeff

Going along with what audit13 was saying, you should be safe as long as the ROM doesn't install a modem/baseband or bootloader.
Without the modem and bootloader the ROMs are interchangeable for the i747 and i747M.
If you install a Canadian bootloader there is an excellent chance you will brick your phone.

dawgdoc said:
Going along with what audit13 was saying, you should be safe as long as the ROM doesn't install a modem/baseband or bootloader.
Without the modem and bootloader the ROMs are interchangeable for the i747 and i747M.
If you install a Canadian bootloader there is an excellent chance you will brick your phone.
Click to expand...
Click to collapse
Thanks again for the info... and on that note I believe I will just forget about flashing Canadian ROM.... better safe than sorry, right!? Thanks guys for all your help!!
Jeff

Which step do i do first? Install T-mobile Stock ROM.

Hi AlI, hope I posted this question in the correct area. I am new to the whole flashing /rooting . I've watched several videos and read tutorials but I'm confused about the order of how to go about doing what I want to do. ..??
I purchased an Unlocked AT&T Galaxy 4 mini from eBay.
I want to flash it to a stock T-Mobile ROM -Kit Kat 4.4.2.
Do I need to root the phone first before attempting to flash it?
Or can I do the Flash T-Mobile ROM without rooting.
I don't want to turn my phone into a brick!!
Any advice would be greatly appreciated.
Excited to learn how to start doing this, thanks again, Dan.

This forum is for the T-Mobile s4, not the s4 mini.
You cannot cross-flash stock ROMs from one Samsung phone to another Samsung phone using Odin; however, you may be able to flash ports from other Samsung phones using a custom recovery.