Recently, AT&T released an update to its Galaxy S6 and the Galaxy S6 Edge, that will take the two devices to Android 5.1.1 Lollipop. The listed firmwares will update Galaxy S6 to build number G920AUCU3BOI2 and the S6 Edge to G925AUCU3BOI2. For those who have been waiting for this update to be released, they can now download the full stock ROM from the downloads. Here is a simple tutorial that will help you install the latest update on both the devices.

Galaxy S6 users who have rooted, modified the system or tripped the KNOX may not be able to install the update over the air. This is because the manufacturers or carriers demand an unmodified stock firmware and no heavy modifications are expected to the final OEM. If for any reason you are not able to install the OTA update, then using the Odin software, you can manually install the full stock firmware onto your device. Other carriers too have released similar updates for their S6 and S6 Edge device.

If you are new to the process then don’t worry, we have got you covered. To install the firmware, go through all the procedure carefully and make sure you have everything setup as per the requirements. This tutorial works only for the AT&T variants of the Galaxy S6 SM-G920 and S6 Edge SM-G925.


  • Make sure you have the perfect device and variant. This tutorial is suitable for only AT&T Galaxy S6 and S6 Edge. This will install G920AUCU3BOI2 and G925AUCU3BOI2 Lollipop 5.1.1 based firmware in the respective devices.
  • Make sure you have fully charged your Galaxy Tab 4 or at least up to 60% of  the battery.
  • Enable USB Debugging on your
  • Make sure you have Samsung drivers installed on your PC.
  • Download the 7zip software to extract the zip file to get the firmware file which is in .tar.md5 extension.

Download Section

  • Download | OI2 Update for AT&T Galaxy S6 (File: (1.6 GB))
  • Download (Mirror) | OI2 Update for AT&T Galaxy S6 Edge (File: (1.6 GB))
  • Download | Odin3 v3.10.7

Backup Your Apps and Data

It is recommended that you backup your apps, contacts, messages, photos, videos and any other important data stored on the internal storage of your phone. Get some of our useful backup apps from the DroidViews archives. This will help you backup your device data easily.

Install Android 5.1.1 Update on AT&T Galaxy S6 and S6 Edge

  1. Make sure you have downloaded the Lollipop firmware for your AT&T Galaxy S6 or S6 Edge. If it is a zip file, extract it on your PC to get the firmware file with .tar.md5 extension.
  2. Now turn off your phone and boot it into the Download Mode. To do this, turn off your device and then press and hold Volume Down + Home + Power buttons simultaneously for 2-3 seconds. When you see the warning screen with a yellow triangle sign, press the Volume Up/Down key to enter Download/Odin mode
  3. Download the required file and extract the file on your PC. You will get the Odin3_v3.10.7.exe file. Open it as administrator to get to the Odin window.
  4. Connect your Galaxy S6 to the computer using the USB cable.
  5. When you connect the device, the ID:COM port on Odin will turn Blue. You’ll also see “Added!!” message to indicate successful connection.odin-3.10.6-firmware-flash2
  6. In case your phone is not detected by Odin, you can troubleshoot the following:
    • Reboot your phone and turn off USB Debugging and turn it on again.
    • Try reinstalling the Samsung USB Drivers.
    • Try changing the USB cable and connecting to other ports.
  7. Now click the AP button on Odin and add the firmware file (G920AUCU3BOI2_G920xxxxxxxOI2_.tar.md5).
  8. In the Options, make sure that only the Auto Reboot and F. Reset Time boxes are checked and everything else are unchecked. (Do not, in any case, check Re-Partition box)
  9. Before you proceed to firmware installation on Odin, make sure everything is set according to the screenshot.
  10. Now, click the Start button on Odin to start installation which might take a while for firmware to install.odin-3.10.6-firmware-installation-pass1
  11. Once you get a PASS! message on Odin, your device will restart. It’s the green signal that indicates successful installation. In case you get Fail! message, make sure you have gone through the preparations carefully

Once you have successfully booted into the firmware, you can now enjoy your Lollipop firmware.

If you come across bootloop, then this may occur sometimes when you have installed a new firmware. To solve this, remove the battery and then put it back again. Boot to Recovery by holding Volume Down + Home + Power. In Recovery, select “wipe data/factory reset” then select “Yes” This will delete all user data. Now Select Reboot to System. If you want a detailed tutorial for these steps, head over to the below link.

How to Perform Data Factory Reset on Samsung Galaxy Devices

For detailed guide on how to install firmware on Samsung Galaxy device, get to the following link:

Install Stock Firmware on Samsung Galaxy Devices Using Odin – Detailed Guide

Also See:

Install Stock G928TUVU2COI5 Firmware on T-Mobile Galaxy S6 Edge Plus

For any queries, comment down below.


  1. Make sure to do the BL, CP, and CSC files as well! I didn’t and my pulse scanner was broken until I did it again with them. Doing this wipes all your installed programs, however.

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