On this page, you will find the official link to download Samsung SM-G991B Stock Firmware ROM (flash file) on your Computer. Firmware comes in a zip package containing Flash File, Flash Tool, USB Driver, and How-to Flash Manual.
Samsung Galaxy S21 5G SM-G991B Stock Firmware (Flash File)
The Flash File will help you Upgrade, Downgrade, or re-install the Stock Firmware (OS) on your Mobile Device. In addition, the Flash File (ROM) also enables you to repair the Mobile device if facing any Software Issue, Bootloop Issue, IMEI Issue, or Dead Issue.
|File Name: G991BXXS3BULC_G991BOWO3BUKG_ZTO_4File.zip
File Size: 6.42 GB
Android Version: 11
Flash Tool: Odin Download Tool
How to Flash (install): Follow Tutorial
How to Flash or Install Firmware (ROM)
1 . Download and extract the Samsung Galaxy S21 5G stock firmware package on the computer.
2 . After extracting the package, you will be able to get the Firmware File, Flash Tool, Driver, and How-to Flash Guide.
3 . Install the provided USB Driver on the Computer (if the USB Driver is already installed, then SKIP this step).
4 . Follow the How-to Flash Manual to Flash or install the Firmware on your Samsung Galaxy S21 5G device.
[*] Flash Tool: If you wish to download the latest version of Odin Download Tool, then head over to Odin Download Tool page.
[*] Take a Backup: If you are going to flash or install the above Firmware on the Samsung Galaxy S21 5G device, then take a backup of everything because your data will be deleted or removed post flashing or installing the Firmware.