How to Install/Return Back Samsung Galaxy S3 AT&T SGH-I747 to Original Factory Stock Firmware

If yo want to return back your Samsung Galaxy SIII AT&T SGH-I747 to its original factory stock firmware, all you need to do is to install back its original factory stock firmware provided by Samsung.

Installing or flashing back the original stock ROM is useful in some other part like, if somehow having done some modding like installing a custom ROM, by means of rooting and you need to completely unroot you Galaxy S3. Because once you installed any unofficial ROM you can’t get any official update on Kies or via OTA anymore unless you have your device runs in an official firmware.

This is also useful for fixing soft-bricks if somehow you messed up somewhere and end up with a soft bricked Galaxy S3, this guide might also help you to recover your Galaxy S3 and bring back to life in no time as long as you can still access the download mode.
You can’t use Kies to reinstall back to original factory stock for it is only capable for upgrading the software, this method is also widely used by other Galaxy S3 advance users for upgrading or by downgrading purposes.
Flashing Stock ROM firmware on Samsung Galaxy S3
Samsung Galaxy S3, the successor to the hugely popular Galaxy S2 has launched around the world. Powered with Android 4.0.4 Ice Cream Sandwich OS, built with lightning fast Exynos 4 (International) 1.4GHz quad-core and Qualcomm Snapdragon (U.S & Canada) 1.5GHz dual-core processor.

What is a Stock ROM?

Stock ROMs are the firmware that has been released from Samsung Kies official firmware server or via OTA. These are being pulled from Kies by an Android firmware experts and carefully re-bundled it to make it flashable by using Odin flasher tool, via CWM and some prepared tool like chainfires’ Mobile Odin. This guide here tackles an Odin flashable stock ROM only, you might also see other methods like flashing via CWM and Mobile Odin (which is to be added soon).

Stock ROMs contains the binary and image files of the whole software packaged, like these:
* Sbl.bin
* cache.img
* factoryfs.img
* hidden.img
* modem.bin
* param.lfs
* zImage

Inside the stock ROM bundled, those binary and images files are packed in three different formats.
The PDA, CSC and PHONE.
Some full packaged stock ROM comes in multiple package this includes with BOOTLOADER image and PIT files, but in flashing it’s been safe not to use these files.
PDA – This the software/firmware build number version and consists to a code of numbers and letters
CSC – (Consumer Software Customization) Refers to the specific country or carriers for that said firmware is being build.
This where it contains the default settings of each specific geographical region, carrier network providers and network data connections.
Phone – This renders the specific Baseband or device MODEM data (GSM/HSPDA.
PIT – the PIT file refers as ‘Partition Information Table’. This is only useful for fixing bricked devices if somehow something changed with the partition table layout of the phone’s system memory. But in normal flashing, you should not use this file, or you may screw up your phone if handed carelessly.

FAQ about flashing stock ROM

Q: Does it safe to flash stock ROM?
A: There is a risk danger in flashing firmware either original stock ROM and or custom ROMs on the device. Any unwanted interruption occurred will cause your device into softbricks. If it is your first time heard about this method,  it is highly recommended to search more and learn about flashing stock ROM before you proceed.

Q: Does Flashing will remove all my data stored on the device.
A: Yes and NO. There are two types of stock ROM, the wiped and non-wiped version. It is highly recommended that you should back-up all your important data stored in the phone’s memory like contacts, messages before flashing.

Q: Do I Need to ROOT or UNROOT my phone before flashing stock ROM?
A: NO need to root or unroot yor device, but you will loose root once flashing is made. So, you need to re-root your device again.

Q: Does Flashing stock ROM to my phone will erase the network lock?
A: NO. Your network (or SIM) lock will still remain active.

Q: Does Flashing stock ROM will remove root on my phone?
A: Yes. If you currently have rooted, your phone will return back to original factory settings after flashing. You need to re-root again to install any 3rd party applications.

Q: Does flashing an operator specific firmware will restrict my open phone to that operator’s network?
A: NO. Your phone still remain open for any Operator SIM. Operator specific builds usually containing “only specific country or carrier provider” logo, bloatwares, wallpapers and/or browser settings, etc.

Disclaimer: We shall not be held responsible if anything happens to your device by following this guide. You may proceed at your own risk, your phone is not a toy for us, it is your own personal property, it is up to you to decide on what and how to do about it.

Update: Warning! DO NOT INSTALL BACK the old 4.1.1 or 4.1.2 stock builds when your device already running on the 4.3 update or on any 4.3 base custom ROM that includes the new 4.3 bootloader. The 4.3 update comes with a secured bootloader, Odin will not let you through while flashing the old firmware builds.

Important Reminders before Flashing Galaxy S3 Stock ROM

- Make sure that your Galaxy S3′s battery is fully charge.
- Stock ROM packages comes in two formats the ‘Full-Wipe’ (delete your stored data after flashing) and the ‘Non-Wipe’ (it doesn’t delete your phone’s stored data) but it is highly recommended to make a back up all important files stored from your phone’s internal memory – contacts, messages, etc.  before flashing no-matter if it is Full-WIpe or Non-Wipe,  just to be safe and ensure that your stored data are in  safe  if something went wrong during the flashing process.
- Remember or back up the APN settings of your device. ( This only done if you try to install other regions stock ROM.
- Use a PC or laptop that runs in Windows OS, with a good and perfectly working USB serial port.  Odin will not work on MAC OS.
- Use the supplied USB cable for your Galaxy S3.
- Enable USB debugging from your phone’s settings. Go to Settings > Applications > Development, and tick the box that says ‘Enable USB Debugging’.
- Do a “Hard Reset” if you have a lot of 3rd party applications installed from your phone, this is useful to gain a smooth flashing. (Just make sure that you already back up all your important files before resetting your device.
- Ensure that KIES and any antivirus are closed and not running in the system tray! Kies will interrupt and doesn’t like Odin, it will block you from flashing.

Step 1: Download the needed tools for flashing

Odin Flasher ToolOdin3_v3.07 link
Samsung Galaxy S3 USB Driverdownload (only needed if you haven’t installed the latest Kies on your PC)

Grab one of these Samsung Galaxy S3 SGH-I747 Original Stock ROM (or you can check out any latest releases if somehow not included here since there will be more upcoming updates in the future).

Reminder! This should not be used on the international version Samsung Galaxy SIII GT-I9300 variants for it may result to unwanted bricks! This works exclusively for U.S SGH-I747 only.

Stock OTA Firmware Android 4.3 Jelly Bean build UCUEMJB LATEST!!! 
PDA: I747UCUEMJB
CSC: I747ATTEMJB
MODEM: I747UCUEMJB
Released Date: November 2013
Stock recovery OTA update flashable zip only, which can be found here; –  AT&T Galaxy S3 to 4.3 i747UCUEMJB. Your device must run on official 4.1.2 UCDMG2, before you can install the 4.3 update.

Stock OTA Firmware Android 4.1.2 Jelly Bean build: UCDMG2
PDA: I747UCDMG2
CSC: I747ATTDMG2
MODEM: I747UCDMG2
Released Date: August 2013
No Odin stock firmware available instead use OTA update flashable zip file via stock recovery, you should install stock I747UCDLK3 first before you can install this: sgh-I747-4-1-2-jelly-bean-update-ucdmg2

Stock ROM/Firmware Android 4.1.1 Jelly Bean build: UCDLK3 
PDA: I747UCDLK3
CSC: I747ATTDLK3
MODEM: I747UCDLK3
Released Date: December 2012
Stock ROM Download: SGH-I747_ATT_I747UCDLK3_I747ATTDLK3, other download links here

Stock ROM/Firmware Android 4.0.4 ICS build: UCALG1
PDA: I747UCALG1
CSC: I747ATTALG1
MODEM: I747UCLG1
Released Date: July 2012
Stock ROM Download: SGH-I747_ATT_I747UCALG1_I747ATTALG1

Stock ROM/Firmware Android 4.0.4 ICS build: UCALEM
PDA: I747UCALEM
CSC: I747ATTALEM
MODEM: I747UCLEM
Released Date: May 2012
(the original firmware when the Galaxy S3 sold in the U.S market)
Stock ROM Download: SGH-I747_ATT_I747UCALEM_I747ATTALEM,

Step 2: Extract the downloaded stock ROM

You need to extract the downloaded file which is packed in zip or rar files, so that you’ll get the tar.md5 file.

Step 3: Run and Configure Odin

Run Odin downloader Odin3_v3.04 on your PC desktop. Watch out the check-boxes options on the right top of Odin, ensure that the ‘RE-PARTITION’ is unchecked, only  the ‘AUTO-REBOOT and ‘F.RESET TIME’ checkboxes are both remained checked.

Step 6: Reboot your Galaxy S3 into Download Mode

To reboot the Galaxy S3 into  download mode , you need to turn the power off.  After it completely shut off,  just  press and hold the Volume Down key,  Home button and the Power ON/OFF button simultaneously.
Samsung Galaxy S3 Download Mode buttons Volume Down,HOME,Power keys
You should then prompted into a warning screen and asking you  to press volume up if you want to continue or volume down to cancel, just simply press volume up to get into download mode. The download mode then displays an Android robot and say’s “Downloading.. Do not turn off target!!”

Step 5: Connect your Phone to PC or Laptop

Once you already reboot the phone in download mode,  simply connect the phone to your PC or laptop USB.
In Odin window – the ID:COM box will turn to blue color and indicates the COM port number and a word “Added” on a log box will prompt you that the device is already detected or recognized by Odin.

Step 6: Load the binary .tar.md5 file

Now, you need to just simply click on the PDA button, then browse to the folder where the .tar or .tar.md5 you have previously extracted and then select and load it. Just like this image below, I used the I747UCALG1  stock ROM on this guide, so it came as I747UCALG1_I747ATTALG1_I747UCALG1_HOME.tar.md5.

Note: Do not put a ‘PIT’ file.

Step 7: Start Flashing or Installing the stock ROM

Once if all set and ready to fire-up, hit the “START” button in Odin to begin flashing the stock ROM.
Do not ever interrupt the phone while already in flashing progress, like disconnecting the cable or turning off the device. Just wait until it completely finish.

Step 8: Watch out for the word PASS!!

When the Stock ROM installation successfully completes, you will then see a word “PASS” in Odin. This indicates that the flashing was already finish, and on the log box it says “All threads completed. (succeed 1 / failed 0)”. The phone will just then automatically reboot, then it’s to remove it from PC or laptop USB connection

Confirm your fresh firmware installed by typing *#1234# or
Go to Settings>About Phone>Firmware info.
You can also do factory reset by dialing *2767*3855#.
Check and reconfigure your APN settings when data networks connection issues encountered.

Possible errors that you may encountered, this is based on my own experience while flashing stock ROM on Samsung Android devices. These are just a few hints on how to resolved it.

Q: I got an error message that says “Set-up connection Failed” ?
A: 1. Check your USB connection from the phone to PC,
2. Connect to another PC USB port
3. Check and try to another USB cable
4. Re-install the USB driver.

Q: Odin just suddenly stuck in the middle of nowhere while in flashing progress, It isn’t responding at all?
A: Check for possible program that might interrupt the process, like disabling the anti-virus and closing any running programs.
Try to use another PC or laptop,

Q: I experienced bootloop or the phone just stuck on Welcome Logo (phone always stop at bootanimation) and it won’t boot normally?
A: You can fix it via recovery mode option, do this:
Boot in recovery mode
1. Press and hold Volume Up, Home and Power button.
2. Use volume keys to select, Up and Down and Power or Home key to select the option
3. Select Wipe Data/Factory Reset using the Home button.
4. Next select the Wipe Cache Partition
5. Lastly, select Reboot System Now to reboot your Galaxy S3 in Normal mode.

Q: My Galaxy S III is now soft-bricked, what should I do then.
A: For 3 years, never been happened to me soft-bricking my older phones using Odin, I was once got soft-bricks using ROM manager. But if somehow this happens to your device, here’s how.
If you can still access the phone in Download Mode, then you can recover it by repeating the flashing procedure again.
If not, that’s seriously bad. The only option is to send it to your nearest service center. Folks at service will recover it by forcing to re-flash the firmware via JTAG.

That’s it for now on how to install or return back Samsung Galaxy S3 SGH-I747 stock ROM. All other questions and suggestions are most welcome, just let me know by leaving a message on the comment form below. Enjoy!.

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