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Samsung Galaxy S21 5G SM-G991N Stock Firmware

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This is the official Android 11 and 12 stock firmware/ROM(Flash file) for the Samsung Galaxy S21 5G SM-G991N.

The flash file for the Samsung Galaxy S21 5G SM-G991N is necessary when you want to perform any of the following software-related tasks:

  • Upgrade/Update your Samsung Galaxy phone’s firmware.
  • Reinstall the stock ROM that was officially installed.
  • Unroot your Samsung Android device.
  • Fix software issues that cause your device OS(Operating System) and apps to hang or misbehave.
  • Fix unknown baseband error.
  • Fix Samsung devices that are in a boot loop like hanging on the Samsung logo or rebooting continually.
  • Use the firmware for Android development purposes.
  • Remove malware, virus, and spyware from your Samsung device and more.

To flash the firmware to your Samsung device, we made a comprehensive Samsung Android firmware flashing tutorial using Odin. You will need to read that post to be able to flash a firmware successfully to any Samsung Android device.

Samsung Galaxy S21 5G SM-G991N Stock ROM Firmware(Flash File)

Here are the links to the stock firmware/flash file for the Samsung Galaxy S21 5G SM-G991N with the latest Android version available.

BrandSamsung
NameGalaxy S21 5G
ModelSM-G991N
Android Version12
BasebandG991NKSU3BUK9_G991NOKR3BUK9_LUC

Download

BrandSamsung
NameGalaxy S21 5G
ModelSM-G991N
Android Version11.0
BasebandG991NKSU1AUA4_G991NOKR1AUA4_KOO_11.0

Download

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BrandSamsung
NameGalaxy S21 5G
ModelSM-G991N
Android Version11.0
BasebandG991NKSU1AUA4_G991NOKR1AUA4_KTC_11.0

Download

BrandSamsung
NameGalaxy S21 5G
ModelSM-G991N
Android Version11.0
BasebandG991NKSU1AUA4_G991NOKR1AUA4_LUC_11.0

Download

BrandSamsung
NameGalaxy S21 5G
ModelSM-G991N
Android Version11.0
BasebandG991NKSU1AUA4_G991NOKR1AUA4_SKC_11.0

Download

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About Samsung Firmware

Your Samsung Geek for Samsung firmware, stock recoveries, combination file, flashing tutorials for all Samsung tools, ENG boot files, modem files, TWRP recovery, and Samsung Drivers.

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