Samsung Galaxy Z Flip5 F731NKSS5FYIA
SM-F731N 1 country Android 16

Samsung Galaxy Z Flip5 F731NKSS5FYIA Firmware

Samsung Galaxy Z Flip5 F731NKSS5FYIA is an Android 16 firmware for South Korea (KOO, KTC). 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 F731NKSU5FYI8, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-F731N is available: F731NKSU6HZIJ.

OS updates guaranteed until: Android 17Security updates until: Jul 27, 2028
9.4/10 (214)2,792 times
Android 16
OS Version
2025-10-01
Build Date
2025-09-01
Security patch
1
Countries
2
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 Z Flip5 use bootloader binary 6 (latest: F731NKSU6HZIJ). If your device already runs binary 6, 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: F731NKSU5FYI2
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-F731N
    KOO, KTC South Korea
    		F731NOKR5FYIA 2025-10-01 10.063 GiB
    SM-F731N_4_20250929200511_7cnyykyjgu_fac.zip

    No matching downloads

    How to flash F731NKSS5FYIA

    • F731NKSS5FYIA 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.

    Security patch: September 2025

    SMR Sep-2025 fixes 70 vulnerabilities, 3 of them critical. Android Security Bulletin: 58, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 11.

    Most severe Samsung fixes:

    • critical Out-of-bounds Write in libimagecodec.quram.so (CVE-2025-21043)
    • high Out-of-bounds write in libsavsvc.so (CVE-2025-21034)

    All fixes and Galaxy models with this patch

    Rollout of F731NKSS5FYIA by region

    Samsung released this build in all regions (2) on the same day, October 1, 2025.

    Device specifications

    • Launched withAndroid 13
    • Display diagonal17 cm (6.7")
    • Display resolution2640 x 1080 pixels
    • RAM8 GB
    • Rear camera resolution12 MP
    • Rear camera typeDual camera
    • Battery capacity3700 mAh
    • Weight187 g

    Specifications of SM-F731B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    F731NKSS5FYIA is Android 16 firmware for Samsung Galaxy Z Flip5, released for South Korea (KOO, KTC). It includes the 2025-09-01 security patch. Samsung built it on 2025-10-01.

    SMR Sep-2025 fixes 70 vulnerabilities, 3 of them critical. Android Security Bulletin: 58, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 11.

    No. A newer build for SM-F731N is available: F731NKSU6HZIJ. Install it instead of F731NKSS5FYIA unless you need this exact version. The previous build was F731NKSU5FYI8.

    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 10.063 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Z Flip5 must be on bootloader binary 5 or lower.

    This build uses bootloader binary 5. It can be flashed on a Samsung Galaxy Z Flip5 running binary 5 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 11 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 Z Flip5

    No changelog details available.
    Model firmware by region