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(SM-G998U) How to download and install Android 13 Stock Firmware on Samsung Galaxy S21 ultra (AT&T, Verizon, Sprint, and T-mobile)


In order to flash/install the latest Android 13 firware on your Samsung phone you have to download odin on your PC. This article provides instructions on how to download and install the latest stable update of Android 13 for Samsung Galaxy S21 Ultra devices with model version SM-G998U Snapdragon (AT&T, Verizon, Sprint, and T-mobile). Following Google’s release of the stable version of its latest operating system, Android 13, many original equipment manufacturers (OEMs) have quickly adopted this update. It’s no surprise that Samsung has also released an update for its flagship smartphones, which includes the new One UI 5.0/5.1 update that comes with several noteworthy features for end-users.




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Among the improvements included in this update are multi-language support, user privacy enhancements, revamped clipboard features, and more. Additionally, there are some design changes, such as an updated media player and support for themed icons to match the wallpaper color. Below are detailed instructions on how to download and install the latest Android 13 update for Samsung Galaxy S21 Ultra devices. You can use this ODIN-based manual method when you can’t do that. You can also use this method to Unbrick your mobile

Is Android 13 available for S21 Ultra with model version SM-G998U (AT&T, Verizon, Sprint, and T-mobile)?

Yes, Android 13 has been available for Android phones since late 2022, and it’s a relatively major update from Google. The carrier-locked versions of the Galaxy S21 Ultra are receiving the stable Android 13 update in the US. The software has been approved for release and is now available for download. You can manually install it on your device using a computer.

What is the latest Android version for the S21 Ultra SM-G998U?

As of April of the year 2023 the latest version is Android 13 with One UI 5.0/5.1.

Features of Android 13

Android 13’s successor includes several additional features and improvements to its predecessor, including major UI and design changes known as “Material You.”

Other improvements include scrolling screenshots, optimized one-handed UI mode, better privacy and security features, improved app notifications, per-app basis language preferences, app permissions for notifications, BT LE Audio support, auto theme icons, updated now playing widget, QR scanner support, enhanced silent mode, tap-to-transfer media controls, multiple profiles for NFC payments, and more.

List of download link Table for Galaxy S21 Ultra 5G SM-G998U Android 13 firmware

Download the firmware flash file for Samsung Galaxy S21 Ultra 5G with the code is SM-G998U is provided by samfw. This firmware for the region with different CSC code in United States. Please make sure the code is correct. You can check model code in Setting – About, in Download mode or you can find it by flipping your phone or among the things you found in the box. This firmware is official from Samsung Cloud Server.

Download Samsung Galaxy S21 Ultra 5G SM-G998U Android 13 firmware

G998USQU6EWD3(Verizon) VZW-United StatesG998UOYN6EWD3T(Android 13)5ffd80c72f65f323c3d7de7fd48a35327.37 GB Full FilesDownload
G998USQU6EWD1(Sprint) SPR United StatesG998UOYN6EWD1T(Android 13)eca1b1725cdaf805909d7f9cffa1e0107.27 GB Full FilesDownload
G998USQU6EWD1T-Mobile (TMB united states)G998UOYN6EWD1T (Android 13)60c6f2d4518cf1523d55c6dff97cc67d7.23 GB Full FilesDownload
G998USQU6EWD1AT&T (ATT United States)G998UOYN6EWD1T(Android 13)69c27c17638c8dabd69f55107be938407.23 GB Full FilesDownload
G998USQU6EWD1US Cellular (USC Cellular)G998UOYN6EWD1T(Android 13)fa8cae4e24329b2248e23a749031bb4f7.22 GB Full FilesDownload

How to know your CSC Code

Samsung maintains many region-specific and carrier-specific update channels. As a result, you have to determine the exact consumer software customization code, AKA the CSC value of your device, before downloading the Odin firmware.

Download Phone Info Samsung app from APK Mirror here. Download Phone info ApkDirect Download from Apk Mirror

Open Phone Info Samsung and go to the CSC Code tab. It should show an option that says Active CSC code. You can also use a Samsung-specific Android secret code — *#1234# — to determine the CSC code. Open the dialer in the Phone app and dial *#1234#. On the next screen, you’ll see the software versions of AP, CP, and CSC as well as the model number of your device. The first 3 letters right after the model number represent the CSC code of your device. The active CSC code can be seen after booting the stock recovery as well.

This is to find what your currently active CSC value is. If you already know what it is, you can go ahead and download your firmware from the table above.

How to use Frija Firmware Tool to download Android 13 for Galaxy S21 Ultra 5G SM-G998U

You will need to download Latest Frija v1.4.4 tool on your Windows Pc. Please note that Frija is not available as APK and is not compatible with macOS or Linux. The tool works only with the 32-bit and 64-bit versions of Windows 7,8,10 and 11.

Before you can download the firmware for your Samsung device, you must find out and note down its model number and CSC code. This is a must if you want to download the correct firmware file and avoid Error 102.

  • Unzip on your Windows desktop using a Zip archiver.
  • Open the extracted folder and launch Frija.exe by double-clicking the executable file.
  • When Frija is launched, you will see the program window with empty fields in which you have to fill in your Samsung device’s model number and CSC code. Obviously, you must have a working internet connection.
    I already described above how you can find out the model number and CSC of your device to download the correct firmware. Fill in the Model and CSC fields and click the Check Update button as shown below.
  • Frija will check for the latest firmware version available for your Samsung phone or tablet and show you the results. Click the Download button.
  • You will be prompted to choose the location on your PC where you want Frija to download and save the firmware file. Don’t modify the name of the firmware file name and click on the OK option.
    In my case, the name of the firmware file was
    Depending on your network speed, you may need to wait until the firmware download completes.
    On completion, Frija will start checking the CRC32 encryption of firmware and then decrypt it.
  • Finally, you’ll see the Download Complete message on the progress bar.
  • Now, navigate to the location where you saved the firmware file.
  • Extract the zip file to get the BL, AP, CP, CSC, and Home CSC binaries inside the firmware folder.

How to Use Odin to Flash Samsung S21 Ultra android 13 Latest Firmware flash file

Step 1: Connect your S21 to your PC via a USB cable. The PC will automatically install the correct USB driver. If the PC doesn’t detect the Samsung device, you will need to install samsung kies or Smart switch on your Computer.

Step 2: Download Odin firmware flashing software from here. Download Odin latest versionFrom XDA-forum all versions

Step 3: Download Samsung firmware from the Table in this post. The Samsung firmware should include AP, BL, CP, CSC, and HOME_CSC files, and these files are in “.tar” or “.tar.md5” format. You will need to unzip the file first.

Step 4: Power off your s21 ultra device and then boot it into Download Mode. To boot into download mode:
Power off the device using the side key or the power icon in quick toggles.
Press and hold the volume up and down key.
While pressing the two buttons, connect your Galaxy S21 device to the PC using the original USB-C cable.
You are now in download mode, press the volume up to continue.

Step 5: Launch the downloaded Odin firmware flashing software (Odin3.exe). You will see the COM port lights up in the Odin window. Now, do as follows:

Step 6:  Click the AP button and select the firmware file starting with AP.
Do the same for BL, CP, and CSC Note that the regular CSC file will completely wipe the device. In order to preserve the data, simply select the HOME_CSC file.
Under the Options tab, make sure Auto Reboot and Reset Time options are selected.

Step 7: Click on the Start button to install Samsung firmware on your Samsung device.

The flashing process will take a few minutes to complete. When the process is completed, the Samsung device will reboot automatically.

How to download and upgrade/update Samsung Galaxy S21 ultra SM-G998U firmware software using Smart Switch


You’re going to need a copy of Smart Switch installed on your computer and your mobile device. Using Smart Switch’s computer version, update your device to the latest Android 13 software.

Download smart switch from PlayStore

Download smart switch for windows PC

Download smart switch for Mac Os

  1. Connect your device to your computer using the USB cable provided with your device, and then open Smart Switch on your computer.
  2. If a software update is available, Smart Switch might automatically prompt you to update the software or will display an option to update.
  3. Click Update and use the on-screen prompts to download the necessary files.
  4. Click OK to proceed. Your device may turn off and on a few times during the update process. When the update is complete, the device returns to the Home screen.
  5. Note: Don’t disconnect the USB cable or use your device until the update is complete.

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