Samsung Galaxy S25 S931NKSS5AYF6
SM-S931N 1 country Android 15

Samsung Galaxy S25 S931NKSS5AYF6 Firmware

Samsung Galaxy S25 S931NKSS5AYF6 is an Android 15 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 S931NKSS4AYE5: bootloader binary raised from 4 to 5, so after installing it there is no way back to older builds. A newer build for SM-S931N is available: S931NKSSDDZJ2.

OS updates guaranteed until: Android 22Security updates until: Jan 30, 2032
Download firmware
9.2/10 (264)6,074 times
Android 15
OS Version
2025-07-10
Build Date
1
Countries
4
CSC codes
5
Bootloader binary

Bootloader binary 5. 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.

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.
    MODEM/CP Version: S931NKSS5AYF6
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S931N
    KOO, KTC, LUC, SKC South Korea
    		S931NOKR5AYF6 2025-07-10 16.097 GiB
    SM-S931N_1_20250701161501_1rzu9i9fh9_fac.zip
    		Download

    No matching downloads

    How to flash S931NKSS5AYF6

    • S931NKSS5AYF6 has bootloader binary 5. Your device must run binary 5 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.

    Rollout of S931NKSS5AYF6 by region

    Samsung released this build in all regions (4) on the same day, July 10, 2025.

    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.

    Frequently Asked Questions

    S931NKSS5AYF6 is Android 15 firmware for Samsung Galaxy S25, released for South Korea (KOO, KTC, LUC, SKC). Samsung built it on 2025-07-10.

    No. A newer build for SM-S931N is available: S931NKSSDDZJ2. Install it instead of S931NKSS5AYF6 unless you need this exact version. The previous build was S931NKSS4AYE5.

    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 16.097 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S25 must be on bootloader binary 5 or lower.

    This build uses bootloader binary 5. It can be flashed on a Samsung Galaxy S25 running binary 5 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 3 other builds of this model use the same binary, so you can switch between them in both directions.

    Other builds and changelog for Samsung Galaxy S25

    No changelog details available.
    Model firmware by region