SM-S931N 1 country Android 16

Samsung Galaxy S25 S931NKSS7BYLR Firmware

Name: Samsung Galaxy S25 (SM-S931N)
Brand: Samsung
Availability: InStock

Samsung Galaxy S25 S931NKSS7BYLR is an Android 16 firmware for South Korea (KOO, KTC, LUC, SKC). It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build S931NKSS7BYKG https://samfirm.shop/build/S931NKSS7BYKG, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-S931N is available: S931NKSSDDZJ2 https://samfirm.shop/build/S931NKSSDDZJ2.

OS updates guaranteed until: Android 22Security updates until: Jan 24, 2032

8.8/10 (161)3,892 times

Android 16

OS Version

2026-01-13

Build Date

n/a

Security patch

Countries

CSC codes

Bootloader binary

Bootloader binary 7. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy S25 use bootloader binary D (13) (latest: S931NKSSDDZJ2). If your device already runs binary D (13), this build cannot be flashed.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Will it work on my device?

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.

MODEM/CP Version: S931NKSS7BYK2

Model	Region	CSC Version	Release date	Size	File name	Download
SM-S931N	KOO, KTC, LUC, SKC South Korea	S931NOKR7BYLR	2026-01-13	16.399 GiB	SM-S931N_2_20260106103201_saamqvjzb6_fac.zip

Device specifications

Launched withAndroid 15
Display diagonal15.8 cm (6.2")
Display resolution2340 x 1080 pixels
RAM12 GB
Rear camera resolution50 MP
Rear camera typeTriple camera
Battery capacity4000 mAh
Weight162 g

Specifications of SM-S931B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

How to flash S931NKSS7BYLR

Install Samsung USB Drivers:Download Official Drivers
Download Odin Flash Tool:

S931NKSS7BYLR has bootloader binary 7. Your device must run binary 7 or lower: it is the 5th character from the end of your current build number.
CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
The Download Mode key combo depends on the model: see all combos.

Full flashing guide

Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

Frequently Asked Questions

S931NKSS7BYLR is Android 16 firmware for Samsung Galaxy S25, released for South Korea (KOO, KTC, LUC, SKC). Samsung built it on 2026-01-13.

No. A newer build for SM-S931N is available: S931NKSSDDZJ2. Install it instead of S931NKSS7BYLR unless you need this exact version. The previous build was S931NKSS7BYKG.

Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The download is 16.399 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S25 must be on bootloader binary 7 or lower.

This build uses bootloader binary 7. It can be flashed on a Samsung Galaxy S25 running binary 7 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 2 other builds of this model use the same binary, so you can switch between them in both directions.