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.


  • Android 5.1.1 OI2 update:
    • AT&T Galaxy S6 — Link | File: (1.59 GB)
    • AT&T Galaxy S6 Edge — Link | File: (1.60 GB)
  • Odin PC software — Link | File: (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!


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 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.

Step 1. Download the Odin software and firmware file from above.

Step 2. Install Samsung Galaxy S6/S6 Edge driver (use method 1 there!) first of all. Double click the .exe file of drivers to begin installation. (Not required if you have already done this.)

Step 3. Extract the firmware file now. You can use a free software like 7-zip for this. Install 7-zip, then right click on firmware file and under 7-zip, select ‘Extract here’. You should get the a file in .tar.md5 format now. We will be loading this file into Odin, to be installed on device (in step 9 below)

Step 4. Extract the Odin file. You should get this file, Odin3 v3.10.6.exe (other files could be hidden, hence not visible).

Step 5. Disconnect your Galaxy S6/S6 Edge from PC if it is connected.

Step 6. Boot Galaxy S6/S6 Edge/S6 Edge into download mode:

  • 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.

Step 7. Double click on extracted file of Odin, Odin3 v3.10.6.exe, to open the Odin window as shown below. Be careful with Odin, and do just as said to prevent problems.


Step 8. Connect your Galaxy S6/S6 Edge now using USB cable. Odin should recognize your device. It’s a must. When it recognizes, you will see Added!! message appearing in the Log box in bottom left, and the first box under ID:COM will also show a no. and turn its background blue. Look at the pic below.

  • 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.

Step 9. Load the firmware file into Odin. Load the files into Odin:

  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.

Step 10. Make sure Re-partition check box is NOT selected, under the Options tab. Don’t use PIT tab either. Go back to Log tab btw, it will show the progress when you hit start button in next step.


Step 11. Click the Start button on Odin now to start flashing the firmware on your Galaxy S6/S6 Edge.Wait till installation is finished, after which your device will reboot automatically. You’ll get PASS message as shown below upon successful installation from Odin.

  • 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.

Step 12. First start of the device may take time, so wait patiently again. Check the Settings > About phone to confirm new firmware.

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.

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Kapil still loves his Galaxy S2 i9100! No, really. And Galaxy Nexus! Need we say more what kind of guy he is? And he's also a die-hard Liverpool FC fan. Email:
  • Juan


    • oh, looks like I missed it the guide above. Sorry.

      But anyway, select them 3 files also in respective tabs.

      To be clear, BL file goes in BL tab, CP file goes in CP tab, and, CSC file goes in CSC tab. With all 4 files select in 4/) tabs of Odin, you are good to go.

  • can i update my AT&T S6 Edge
    since i am in 5.0.2 with baseband version G925AUCU1AOE2

    • Krishna


  • Jose

    After updated 5.1.1 my galaxy s6 edge 925a still in samsung screem it doesnt go to power 0n.

    • Krishna

      Did you get PASS on Odin? And you have the correct phone with model no. SM-G925A, or G920A, right?
      It’s stuck at Samsung logo, with Galaxy S6 written, or only Samsung logo which appears with sound?
      Is it restarting again and again?

      • hello if I got stuck in the logo of Samsung after using ODIN is an SM-G920A a solution? Install it several times but did not get off

        • Krishna

          Hey, are you selecting all 4 files in Odin?
          That’s pretty important to do.

          • Hi i have the same problem, i do all step by step and odin Pass, but stuck samsung logo and say in red letters”kernel rev, chek fail. device:3 binary:2

        • i fix the problem, just flash again the AP file

    • Krishna

      I will get another firmware to download, which shouldn’t have this problem. Please wait for my reply.
      Btw, you still need to fix it, right? Or it’s already fixed?

    • is working for me i just use a different odin version]

  • I did these steps and it worked perfect for me
    for sure install the drivers and ENABLE USB DEBUGGING before enter in download mode
    2 enter in download mode
    3 open odin, i used v3 10.7 version and works fine for my edge
    4 just add the files that are in the zip file, you have to do this step very carefully take your time and add the correct file and it looks like this
    after add the correct files hit START—————– ENJOY Android 5.1.1!!!!!


    can i update my cricket galaxy s6 using this its model #SM-920AZ Baseban version G920AZTUU2AOF4

    • CYRUS


  • kamaldeep singh

    can i update my galaxy s6 edge SM-G925A with baseband version G925AUCU1AOE2

    • Krishna

      Yes you can.

      • kamaldeep singh


      • Juan

        Can I install it on Galaxy S6 ( SM- G920A ) BASEBAND G920AUCU1AOE2 ?

  • Juan

    Can I install it on Galaxy S6 ( SM- G920A ) BASEBAND G920AUCU1AOE2 ?

  • Can you install this on international versions (UK for example)?

  • Fabio Toledo

    I`m tring to root g920aztuu3boj6
    Anyone can help me ?
    Ping Pong does not work

  • randall

    you can upgrade samsung s6 edge based G925AUCU2AOF3

  • Everything worked for me, Thank you! Looking forward to further updates 😀

  • Darien

    Hey my AT&T S6 stuck on the logo screen, i have tried flashing the firmware on it twice and am still getting the same problem.. What can i do to resolved
    this problem?

  • AdiU


  • If i do only the proceses described to update to android 6.0 then my phone get rooted. i dont want to root my phone only update it

  • Ayoub Elamim

    please on mod donload screen i have as variant sm-g920, but on settings on my phone i have sm-g920f, thats make me crazy i don’t know each turns i go to updat it please can anyone help

  • Ayoub Elamim

    please on mod donload screen i have as variant sm-g925a, but on settings on my phone i have sm-g920f, thats make me crazy i don’t know each turns i go to updat it please can anyone help, and i have a s6 edge

  • shan

    My device s6 Edge (925A) is unlocked and Rooted. i am using it with a Non AT&T sim card . if i Flash it with above Mentioned Stock Rom , will it again locked to the At&T network..?
    Will the carrier Lock back again ??

  • Pj

    for usa att customer, you need to have about 700+ MB of free storage to do OTA firmware update. to update your galaxy s6 att G920A, you must first turn off your wifi and turn on your data to connect to att network. you must be with att network with data on and not on airplane mode. then goto settings, system device, about device, and software update. as soon as your device is able to recognize the new update, you can now turn on your wifi and click download update. good luck.