SM-S731N 1 country Android 16

Samsung Galaxy S25 FE S731NKSS4AYL3 Firmware

Samsung Galaxy S25 FE S731NKSS4AYL3 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. A newer build for SM-S731N is available: S731NKSSACZJ2.

OS updates guaranteed until: Android 23Security updates until: Sep 28, 2032
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Android 16
OS Version
2026-01-02
Build Date
1
Countries
4
CSC codes
4
Bootloader binary

Bootloader binary 4. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy S25 FE use bootloader binary A (10) (latest: S731NKSSACZJ2). If your device already runs binary A (10), 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: S731NKSS4AYL3
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S731N
    KOO, KTC, LUC, SKC South Korea
    		S731NOKR4AYL3 2026-01-13 11.304 GiB
    SM-S731N_1_20260102130040_t1x7uu8lhm_fac.zip

    No matching downloads

    How to flash S731NKSS4AYL3

    • S731NKSS4AYL3 has bootloader binary 4. Your device must run binary 4 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 S731NKSS4AYL3 by region

    Samsung released this build in all regions (4) on the same day, January 13, 2026.

    Device specifications

    • Launched withAndroid 16.0
    • Display diagonal17 cm (6.7")
    • Display resolution1080 x 2340 pixels
    • RAM8 GB
    • Rear camera resolution50 MP
    • Rear camera typeTriple camera
    • Battery capacity4900 mAh
    • Weight190 g

    Specifications of SM-S731B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    S731NKSS4AYL3 is Android 16 firmware for Samsung Galaxy S25 FE, released for South Korea (KOO, KTC, LUC, SKC). Samsung built it on 2026-01-02.

    No. A newer build for SM-S731N is available: S731NKSSACZJ2. Install it instead of S731NKSS4AYL3 unless you need this exact version.

    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 11.304 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S25 FE must be on bootloader binary 4 or lower.

    This build uses bootloader binary 4. It can be flashed on a Samsung Galaxy S25 FE running binary 4 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". No other build of this model uses binary 4.

    Other builds and changelog for Samsung Galaxy S25 FE

    No changelog details available.
    Model firmware by region