Download Android 5.1.1 update for AT&T Galaxy S6 (G920AUCU3BOI2) and S6 Edge (G925AUCU3BOI2) [Odin TAR]

AT&T recently released the Android 5.1.1 update for its Galaxy S6 (build G920AUCU3BOI2) and Galaxy S6 Edge (G925AUCU3BOI2). For those who are still to get the 5.1.1 update as an OTA, we now have a firmware available for your download and installation, all thanks to cool guy Sunderwear.

Before you head to installing them, know that THIS WILL DELETE everything on your device. So, be sure to make appropriate backups. You have been warned.

Also, this will unroot your device, so if you care about root, don’t update to Android 5.1.1 just yet as there is no root access available yet on 5.1.1.

Downloads

• Android 5.1.1 OI2 update:
  • AT&T Galaxy S6 — Link | File: G920AUCU3BOI2_User_Binary.zip (1.59 GB)
  • AT&T Galaxy S6 Edge — Link | File: G925AUCU3BOI2_User_Binary.zip (1.60 GB)
• Odin PC software — Link | File: Odin3_v3.10.6.zip (1.6 MB)

Supported devices

• AT&T GALAXY S6 and S6 EDGE, model no. SM-G920A and SM-G925A respectively!
• Don’t try this on any other device whose model no. is not as given above!

Disclaimer

Installing an official firmware through Odin doesn’t void your device’s warranty, but it remains an unofficial process and thus you need to be cautious of it. In any case, you only are responsible for your device. We won’t be liable if any damage occurs to your device and/or its components.

Backup!

Backup important files stored on your device before proceeding with the steps below, so that in case something goes wrong you’ll have backup of all your important files. Sometimes, Odin installation may delete everything on your device!

Step-by-step Guide

Because installing this Android 5.1.1 firmware will delete everything on your device, be sure to make full backups of important data and files, including contacts, messages, photos and videos.

• Power off your Galaxy S6/S6 Edge. Wait 6-7 seconds after screen goes off.
• Press and hold the three buttons Volume down + Power + Home together until you see warning screen.
• Press Volume Up to continue to download mode.

• You cannot proceed until you get the Added!! message, which confirms that Odin has recognized your device.
• If you don’t get Added!! message, you need to install/re-install drivers again, and use the original cable that came with device. Mostly, drivers are the problem (look at step 2 above).
• You can try different USB ports on your PC too.

1. Click the BL button on Odin and the select the .tar.md5 file that begins with BL from the extracted files from step 3.
2. Click the AP button on Odin and the select the .tar.md5 file that begins with AP from the extracted files from step 3.
3. Click the CP button on Odin and the select the .tar.md5 file that begins with CP from the extracted files from step 3.
4. Click the CSC button on Odin and the select the .tar.md5 file that begins with CSC from the extracted files from step 3.

• Info: When you load files, Odin checks the md5 of firmware file, which takes time. So, simply wait until that’s done and the firmware file is loaded. Don’t worry if Odin gets unresponsive for a while, it’s normal. Binary size will also show up in Odin.

The screenshot above shows only one file (AP) as selected, but you have to select all four files as said above.

• If Odin gets stuck at setup connection, then you need to do this all again. Disconnect your device, close Odin, boot device into download mode again, open Odin, and then select the file and flash it again as said above.
• If you get FAIL in the top left box, then also you need to flash the file again as stated just above.

That’s it.

Enjoy your Galaxy S6/S6 Edge on Android 5.1.1 update, here’s hoping performance of the device is improved as well.

Need help? Sure let us know via comments below.

Root OI2 Update

If you wish to root your AT&T Galaxy S6/S6 Edge on Android 5.1.1, then check out the link below.

• Galaxy Note 5 Root
• Galaxy S6 Edge+ Root