The new Android 8.0.0 Official update for T-Mobile Galaxy S8+ devices has started to roll out recently in the United States. Check the info below and learn how to manually install the new official update.

Android 8.0.0 official update brings tons of new changes and improvements that should offer you an improved OS experience over the previous one. This tutorial will teach you how to manually update your phone, as the new Android 8.0.0 roll out will take as it is launched in stages.

For the updating process you will use the ODIN app, and this means that you should be able to install the Android 8.0 official update over a custom Android 7.0 ROM firmware, too. You will learn more on how to do this by reading the guidelines below.

Preparation Steps:

The tutorial can be used only for the Samsung Galaxy S8 Plus T-Mobile USA devices.
The model number of your phone has to be the SM - G955U.

Don't use the tutorial for other different smartphones, as it won't work.

Download the Samsung USB Drivers from here and install them on your PC. The drivers will allow you to easily connect the phone to your PC via usb cable.

For the update you will use the Odin tool, and for it to work you need to install the above usb drivers, and to enable USB Debugging from Developer Options menu.

Developer Options menu might be hidden, go to Settings> About Phone> Software Information and tap seven times on the Build Number text.
Get back to Settings, and you will see the Developer Options menu listed there. Open the menu, and there you should find USB Debugging for you to enable.

You can install the Android 8.0 stock firmware over rooted firmware, but you should know that root access won't survive the update.
Any custom Recovery you might've installed will be lost in the process and replaced with a stock Recovery.

The Android 8.0 can be flashed with Odin over a custom ROM, but an extra Factory Reset process has to be applied after the update is done installing. This will help the phone boot in normal mode.
The factory reset process will wipe the system partition, but it won't delete any data from internal storage. The factory reset steps are listed at the end of the post.

If your phone runs 100% stock firmware, then you should continue to the next part of this post right away, as no data will be lost in the process.

Read the entire post and do not skip any steps.

This tutorial is destined to be used by advanced users; we cannot be blamed in case you brick the phone nor in case you lose any data in the process.

How to install Android 8.0.0 Oreo update manually for T-Mobile Samsung Galaxy S8 Plus:

  1. Download the Android 8.0.0 G955USQU2CRB9 archive file from here.
  2. After the download is completed successfully you need to extract the installation files and save them on your computer.
    - you will obtain six different files that you need to save on your computer.
  3. Download Odin 3.12.3 zip from here.
    When the download is done you have to unzip the files.
  4. Switch off the device.
  5. Boot the phone in Download Mode.
  6. Open Odin on your computer.
  7. Connect the TMO Galaxy S8+ to PC via usb cable.
    - wait for Odin to detect the phone.
    - if the device is not added you need to reinstall the Samsung usb drivers.
  8. Go back to Odin and start loading the update files.
    Click AP button and load the G955USQU2CRB9 tar.md5 with AP in its title.
    Click BL and load the file with BL in the name.
    Click CP and load the file with CP in the name.
    Click CSC and load the G955USQU2CRB9 with HOME_CSC in its title. Don't load the CSC-only named file, as that one will tell Odin to wipe clean the smartphone for all data.
  9. Confirm the update installation by pressing the START button.
    - don't press any buttons until the update is done.
  10. Reboot the phone in normal mode after the installation is done.
    Unplug the phone and wait for first boot process to complete.

These were the steps that you had to take in order to complete the update process.

If the FAIL alert is shown by ODIN or other error prevents the installation, then you should try and repeat the installation process. If you try to repeat installation you need to make sure that you won't skip any steps, and that your phone meets all requirements.


If the PASS alert is shown by ODIN, but then your phone enters in a boot loop, or it gets stuck at the boot animation screen, then you will have to Factory Reset the phone.

The Factory Reset steps are listed below, and these need to be used by those that have installed the official update over a custom ROM.

Here's how to factory reset the device from Recovery Mode:

  • power off the device.
  • boot it in Recovery Mode.
  • select 'wipe data/ factory reset'.
  • confirm.
  • reboot phone in normal mode.

If you need more help you need to tell us in comments.

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