Download Samsung Galaxy S21 Ultra 5G SM-G998B Stock Firmware (All Regions)
⚠️ Important Notice
Disclaimer: Flashing firmware is a high-risk process. It is used to fix boot loops, software bugs, or to upgrade/downgrade your system. Ensure your phone is the SM-G998B variant (Exynos) before proceeding. Using the wrong firmware will damage your device. Backup your data as this process will wipe everything
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| Samsung Galaxy S21 Ultra 5G SM-G998B firmware |
🚀 Why Download the SM-G998B (G998BXXSBGXDH) Firmware?
Downloading the official stock ROM (Flash File) is essential for:
📥 Samsung Galaxy S21 Ultra 5G (SM-G998B) Official Firmware Guide
Fixing Software Issues: Resolving "Hang on Logo" or random restarts.
Unrooting: Returning the device to its official factory state.
Manual Updates: Installing the latest security patches before they arrive via OTA.
Restoring Stability: Fixing system lag or battery drain caused by corrupted files.
📂 Firmware Details
Device Name: Samsung Galaxy S21 Ultra 5G
Model Code: SM-G998B G998BXXSBGXDH
Region: Global / International (Exynos)
Android Version: Android 11 / 12 / 13 / 14 (Depending on your choice)
File Components: BL, AP, CP, CSC, and HOME_CSC.
🛠️ How to Flash SM-G998B via Odin
Download & Extract: Get the firmware zip file and extract it on your PC.
Drivers: Install the latest Samsung USB Drivers.
Download Mode: Power off your S21 Ultra. Hold Volume Up + Volume Down and connect to your PC. Press Volume Up to confirm.
Odin Tool: Open Odin.exe. Your device should show under ID:COM.
Select Files:
BL: Select the BL file.
AP: Select the AP file (Wait for it to load).
CP: Select the CP file.
CSC: Use CSC for a clean flash or HOME_CSC to keep data.
Start: Click Start and wait for the green "PASS" message.
🔗 Reliable Download Sources
To get the original and safe firmware, we recommend these trusted databases:
🎥 Video Guide: Flashing S21 Ultra Safely
Watch this video to see the exact steps of using Odin with the S21 Ultra series:
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