Samsung Galaxy Z Flip4 F721NKSS6HYFD
SM-F721N 1 country Android 15

Samsung Galaxy Z Flip4 F721NKSS6HYFD Firmware

Samsung Galaxy Z Flip4 F721NKSS6HYFD 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 F721NKSS6HYF1: security patch 2025-07-01 instead of 2025-06-01. A newer build for SM-F721N is available: F721NKSS8IZH2.

OS updates guaranteed until: Android 16Security updates until: Jul 26, 2027
8.8/10 (245)5,840 times
Android 15
OS Version
2025-07-16
Build Date
2025-07-01
Security patch
1
Countries
4
CSC codes
6
Bootloader binary

Bootloader binary 6. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy Z Flip4 use bootloader binary 8 (latest: F721NKSS8IZH2). If your device already runs binary 8, 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: F721NKSU6HYD2
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-F721N
    KOO South Korea
    		F721NOKT6HYFD 2025-07-16 2025-07-17 8.628 GiB
    SM-F721N_13_20250701090241_qoy5ci34lz_fac.zip
    SM-F721N
    KTC, LUC, SKC South Korea
    		F721NOKR6HYFD 2025-07-16 2025-07-17 8.542 GiB
    SM-F721N_4_20250701080611_5t2leqgzsg_fac.zip

    No matching downloads

    How to flash F721NKSS6HYFD

    • F721NKSS6HYFD has bootloader binary 6. Your device must run binary 6 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: July 2025

    SMR Jul-2025 fixes 32 vulnerabilities, 1 of them critical. Android Security Bulletin: 22, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 9.

    Most severe Samsung fixes:

    • high Out-of-bounds write in KnoxVault trustlet (CVE-2025-20983)

    All fixes and Galaxy models with this patch

    Rollout of F721NKSS6HYFD by region

    Samsung released this build in all regions (4) on the same day, July 17, 2025.

    Device specifications

    • Launched withAndroid 12
    • 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-F721B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    F721NKSS6HYFD is Android 15 firmware for Samsung Galaxy Z Flip4, released for South Korea (KOO, KTC, LUC, SKC). It includes the 2025-07-01 security patch. Samsung built it on 2025-07-16.

    SMR Jul-2025 fixes 32 vulnerabilities, 1 of them critical. Android Security Bulletin: 22, Samsung Semiconductor: 1, Samsung-specific issues (SVE): 9.

    No. A newer build for SM-F721N is available: F721NKSS8IZH2. Install it instead of F721NKSS6HYFD unless you need this exact version. The previous build was F721NKSS6HYF1.

    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 Samsung Galaxy Z Flip4 must be on bootloader binary 6 or lower.

    This build uses bootloader binary 6. It can be flashed on a Samsung Galaxy Z Flip4 running binary 6 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 9 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 Flip4

    No changelog details available.
    Model firmware by region