Is G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF stable for daily use?

This is an official firmware release. All official releases from FirmwareMirror are stable and tested. Always backup your data before flashing any firmware.

Is this firmware the latest version?

Yes, G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF is the version shown. Check FirmwareMirror regularly for newer versions of Samsung Galaxy S21 (Korea) firmware.

Download Samsung Galaxy S21 (Korea) ROM - G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF (KOO)

Name: G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF for Samsung Galaxy S21 (Korea)
Availability: InStock
Author: Samsung

What's New

Samsung SM-G991N firmware update — December 2021 security patch. Build: G991NKSS3BULC. Includes the latest Android security patches and system stability improvements. Flash using Samsung Odin3.

Android Version

N/A

File Size

1.98 GB

Release Date

Dec 01, 2021

Flash Method

Odin

Download ROM

Available

Download Now

File Size: 1.98 GB

Mirror Downloads (1)

Mirror 1

1 mirror(s) available • Click any button to download

Verification & Details

Package Name:

G991NKSS3BULC

How to Flash Odin on Samsung Galaxy S21 (Korea)

Please follow these steps carefully to install the G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF update safely. Ensure your device has at least 60% battery.

Download the G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF Recovery ROM (.zip file).
Transfer the file to the internal storage root directory of your Samsung Galaxy S21 (Korea).
Navigate to Settings > About Phone > System Update.
Tap the OS logo 10 times to enable advanced features.
Tap the top-right menu icon and select 'Choose update package'.
Select the downloaded zip file and wait for the automated installation to complete.

Back to Samsung Galaxy S21 (Korea)

Download Samsung Galaxy S21 (Korea) Firmware (G991NKSS3BULC/G991NOKR3BULC/G991NKOU3BUKF)