Is G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 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, G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 is the version shown. Check FirmwareMirror regularly for newer versions of Samsung Galaxy S21 Ultra (Korea) firmware.

Download Samsung Galaxy S21 Ultra (Korea) ROM - G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 (KOO)

Name: G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 for Samsung Galaxy S21 Ultra (Korea)
Availability: InStock
Author: Samsung

What's New

Samsung SM-G998N firmware update — January 2025 security patch. Build: G998NKSS8GYA1. Includes the latest Android security patches and system stability improvements. Flash using Samsung Odin3.

Android Version

N/A

File Size

273.72 MB

Release Date

Jan 01, 2025

Flash Method

Odin

Download ROM

Available

Download Now

File Size: 0.27 GB

Mirror Downloads (1)

Mirror 1

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

Verification & Details

Package Name:

G998NKSS8GYA1

How to Flash Odin on Samsung Galaxy S21 Ultra (Korea)

Please follow these steps carefully to install the G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 update safely. Ensure your device has at least 60% battery.

Download the G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1 Recovery ROM (.zip file).
Transfer the file to the internal storage root directory of your Samsung Galaxy S21 Ultra (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 Ultra (Korea)

Download Samsung Galaxy S21 Ultra (Korea) Firmware (G998NKSS8GYA1/G998NOKR8GYA1/G998NKOS8GYA1)