How to Root AT&T Samsung Galaxy S4 SGH-I337 on UCUAMF3 Firmware And Install CWM and TWRP Recovery

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Samsung Galaxy S4 is one of the latest handset from the company. It features a 5 inch Super AMOLED capacitive touchscreen and is powered by Quad-core 1.6 GHz Cortex-A15 processor running on Android 4.2.2 Jelly Bean.

In this post we will root AT&T Samsung Galaxy S4 on UCUAMF3 Firmware and install CWM and TWRP Recovery. Rooting an Android phone gives you full access to the device so that remove the bloat apps that feed on more RAM and the memory of your device while installing a custom recovery enables you to install a custom ROM in your device for faster performance. And also after rooting you can install custom rom and various type of system apps which need root access.

Tip – Best Custom ROM for Samsung Galaxy S4


Before you proceed, please download the essentials given below


How to Root AT&T Samsung Galaxy S4 SGH-I337 on UCUAMF3 Firmware

1. Install the Terminal Emulator app in the internal memory of your device

2. Take out the memory card from the device and format it n exFAT format by inserting it to your computer with the help of a card reader.

3. When the formatting is completed, extract the rooting package zip file to the memory card.

4. Now remove the card from the computer and insert it in your phone.

5. Open the Terminal Emulator app and type the following lines:

cd /mnt/extSdCard



6. On typing the above command, the “” file will be issued and the all necessary apps like busybox and SuperSU will be installed in your device.

When all the process is successfully complete, your AT&T Galaxy S4 SGH-I337 will be rooted and you will get full access in your device. You can find the SuperSU app in the app drawer of the device. If you want to verify the successful root of the device, download and install Root Checker from Google PlayStore.

How to Install CWM Recovery on AT&T Samsung Galaxy S4 SGH-I337 


Step 1. Use a root file manager to remove /system/etc/

Step 2. Now extract the zip file in your device.

Step 3. Use the following adb shell/terminal commands:

adb push recovery.lok /data/local/tmp/
adb push loki_flash /data/local/tmp/
adb shell
chmod 755 /data/local/tmp/loki_flash
/data/local/tmp/loki_flash recovery /data/local/tmp/recovery.lok


After this the CWM Recovery has been successfully installed in your device. You can use Nandroid Manager to edit or alter the nandroids made by this recovery. Nandroid Manager is available in Google PlayStore.

How to install TWRP Recovery on Rooted Samsung Galaxy S4 SGH-I337 using Goo Manager


Goo Manager app from Play Store

1. Install the Goo Manager app on your device and open it. Tap on Menu button and select “Install OpenRecoveryScript” and confirm by tapping on “Yes”.

2. In the next screen a prompt will be given that the openrecovery file matches to your device or not. On your AT&T S4 if its “jflteatt” then tap on Yes to confirm.

3. Now the flashing process of TWRP Recovery will initiate. Wait for a few minutes to complete the process.

4. When the process is successfully completed, a confirmation message will be displayed- “Recovery has been installed.

5. Now select “Reboot recovery” to reboot into TWRP recovery.

Now the TWRP Recovery has been successfully installed on your rooted Samsung Galaxy S4 AT&T.


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One thought on “How to Root AT&T Samsung Galaxy S4 SGH-I337 on UCUAMF3 Firmware And Install CWM and TWRP Recovery

  1. adding to post above: S4 is Rooted and runs nicely with Wanam Xposed app; the failure is successfully getting an alternate Recovery working correctly. The CWM Rom Mgr app installs, prompts to install custom recovery but booting into Recovery and attempting to read custom ROMs fails with invalid signature on file. I’ve found other indications that CWM Recovery will not work with MF3 Firmware. Hoping to find a new method to successfully update the Recovery for MF3 OEM Firmware.

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