August 15, 2013

How to Root Galaxy S4 (AT&T) SGH-I337 on Android 4.2.2 UCUAMF3 Jelly Bean Firmware

An official Android 4.2.2 Jelly Bean Over-The-Air (OTA) update with build number I337UCUAMF3 has been released for the AT&T subscribers of the Samsung Galaxy S4 (SGH-I337).

Galaxy S4 (AT&T) SGH-I337 users who have already updated their devices with Android 4.2.2 UCUAMF3 Jelly Bean, may root their devices using the tutorial below.

This tutorial uses the Root Exploit package created by Recognized XDA-Developers, DooMLoRD, which later adapted by Jortex to make it work on Galaxy S4 (AT&T) SGH-I337. The Root Exploit package allowing Galaxy S4 users to root their devices easily without having to wipe the device or flash a full prerooted factory image. It's completely supports Android 4.2.2 Jelly Bean with firmware build number I337UCUAMF3.

Disclaimer: Rooting voids the warranty of your device. We and the developer of this rooting procedures shall not be held responsible if any undesirable outcomes may happen to your device. use of this root guide is solely at your own risk!

Pre-requisites
1. Install USB Drivers for Samsung Galaxy S4 on the computer.
2. Install Android Terminal Emulator on your device.
3. Enable USB Debugging Mode on the phone by navigating to Settings >> Developer Options.
4. Make a backup of all your important data before following the guide.
5. Ensure the battery of the phone is charged more than 80 per cent.
6. The Root Exploit package works only on Samsung Galaxy S4 (AT&T) SGH-I337 running on Android 4.2.2 UCUAMF3 Jelly Bean firmware. Applying this to any incorrect variant might brick the device. Verify the model number of the Galaxy S4 by navigating to Settings >> About Phone.

File Required
1. Root Exploit (Mirror Link) for Galaxy S4 (AT&T) SGH-I337 (Root_for_ATTSG4_FM3.rar)

Steps to Root Galaxy S4 (AT&T) SGH-I337 Running on Android 4.2.2 UCUAMF3 Jelly Bean Firmware
Step 1: Extract Root Exploit package using WinRAR/7-Zip/WinZip or any other extracting tool.
Step 2: Insert a microSD card into your device. Make sure it is formatted as exFAT (not FAT32).

Note: If you have a 64GB microSD card you can use your phone to format it as exFAT by default directly from the Storage settings. However, if you have anything less than 64GB microSD card you may have to use the computer to format it manually as exFAT. Remember, if your microSD card is not formatted as exFAT you will see "permission denied" errors when running the exploit.

Step 3: Connect the Galaxy S4 to the computer using USB cable.
Step 4: Copy all files and folders from the Root Exploit package directly onto the root of your microSD card (nowhere else).
Step 5: Open the Android Terminal Emulator app on your phone, then run the following commands:

cd /mnt/extSdCard
./pwn
./script.sh

Note: After running the second command you should have seen your $ change to a # meaning you have root access. The third command is required to make this root access permanent.

Step 6: Once all commands are completed, close the Android Terminal Emulator app and check if SuperSU has any update in the Google Play Store.
Step 7: Open SuperSU app and let the binary update itself to the latest (if any updates are available).
Step 8: Once completed, reboot your device and confirm you still have root access.

Galaxy S4 (AT&T) SGH-I337 running on Android 4.2.2 UCUAMF3 Jelly Bean is now rooted successfully. You can now install any app that requires root permission. Verify the root status of the device by downloading Root Checker app from Google Play Store.

Note: Many Samsung devices store a flash counter that keeps track of how many times you have flashed custom firmwares to your device. Triangle Away can be used to reset the flash counter to zero.

Thank's to all fellas at XDA who first tried out this rooting technique. This method was originally posted via XDA-Developer original thread.

Click here to know How to Root Galaxy S4 (AT&T) SGH-I337 on Android 4.3 Jelly Bean Without Tripping the KNOX Warranty Void Counter

36 comments:

  1. I did this and I'm rooted but how do I unroot?

    ReplyDelete
    Replies
    1. Open the SuperSU app, tap Settings then choose Full Unroot.

      Delete
  2. I tried this and once I got to ./pwn
    It says permission denied. Any help?

    ReplyDelete
    Replies
    1. Make sure the microSD card is formatted as exFAT. Please read the note in step 2.

      Delete
    2. yes but there is no instructions on doing that. is there a way to do it without a card reader?

      Delete
  3. This comment has been removed by the author.

    ReplyDelete
  4. Can you load custom ROM after root?

    ReplyDelete
  5. I have done this..I don't know if my phone is rooted or not I see no difference. How can you check if your phone is rooted?

    ReplyDelete
    Replies
    1. go to the google play store and download root checker

      Delete
  6. done this several times and still doesnt work, i am formatted correctly, this is supposed to work with the ota update correct

    ReplyDelete
  7. It says (JDQ39.I337UCUAMF3) Is not supported....help please

    ReplyDelete
    Replies
    1. It says that after running ./pwn its not a big deal won't affect the root. Just run ./script.sh after pwn and it will work.

      Delete
  8. I need to unlock my sim for the samsung sgt i337 (at&t) anything for that

    ReplyDelete
  9. This comment has been removed by the author.

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  10. Thanks! I rooted my phone perfectly! :D

    ReplyDelete
  11. How can I downgrade my Samsung Galaxy S4 from 4.2.2 to 4.1.1?

    ReplyDelete
  12. I tried this and once I got to cd /mnt/extSdCard

    It says no such file or directory. Any help?

    ReplyDelete
    Replies
    1. Did you mount your SD card properly?

      Delete
    2. had same problem and i had to unmount the sd card then remount it and it worked like i charm. thanx!

      Delete
  13. Great Job, got rooted but lost it upon restart, any suggestion? Thanks

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  14. On jdq39 how to enable the usb debugging mode?

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  15. Root works, but when rebooting, root access is gone. (even after running script.sh

    ReplyDelete
  16. This comment has been removed by the author.

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  17. Really awesome and helpful article thanks for sharing (Y)Just About Pakistan

    ReplyDelete
  18. supersu doesnt update I have to update like twrp or normal?

    ReplyDelete
  19. more at: http://techglen.com/2013/10/06/root-samsung-galaxy-s4-one-click-versions-guide/

    ReplyDelete
  20. My S4 is running Jellybean 4.2.2 but my baseband version is UCUAMDL. Will this root brick my phone because I am having a difficult time finding another way to do it that breaks it down step by step. Any other phone ive had to root has always been pretty easy to figure out. Any suggestions?

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  21. Root access is confrimed thanks for the help

    ReplyDelete
  22. So i've completed this and have had success. I'm a bit unclear as to how to proceed to load a custom ROM after completing this tutorial for the MF3 ATT build. Can someone please point me in a helpful direction?

    ReplyDelete
  23. This comment has been removed by the author.

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  24. After my phone S4 successfully rooted, a lot of junk info, line after line started popping up over and over on the upper right corner of S4. I restarted, applied cold boot on phone but could not get rid of them. It seems those junks came from a result of a running bat or exe file. Can anyone help me to get rid of such junks?
    Thanks

    ReplyDelete
  25. Muchas gracias, les agradezco su aporte a este tutorial. hice todo y cada uno de los pasos en el tutorial y no tuve errores, estoy muy feliz porque necesitaba ser un SuperUsuario para poder compartir mi plan de datos con otras personas y lo logre. GRACIAS GRACIAS GRACIAS!!!. saludos desde Republica Dominicana.

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  26. I was just reading your article about Galaxy and trust me it was all worth written. In Pakistan Qmobile is on the top with Noir.

    ReplyDelete
  27. So ive rooted my phone but im scsred it might get bricked beacusr I didnot isntall a recovery any ideas?

    ReplyDelete
  28. helpful article thank you for sharing www.Hamarawaqt.com

    ReplyDelete