SM-F966U1 8 countries Android 17

Samsung Galaxy Z Fold7 F966U1UEUDCZJB Firmware

Samsung Galaxy Z Fold7 F966U1UEUDCZJB is an Android 17 firmware for 8 countries, 19 CSC codes. 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 F966U1UESDCZJ1, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. This is the newest build for SM-F966U1.

OS updates guaranteed until: Android 23Security updates until: Jul 6, 2032
Download firmware
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Android 17
OS Version
2026-10-20
Build Date
2026-10-05
Security patch
8
Countries
19
CSC codes
D (13)
Bootloader binary

Bootloader binary D (13). Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

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: F966U1UEUDCZJB
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-F966U1
    ACG, AIO, ATT, CCT, LRA, TFN, TMB, TMK, USC, VZW, XAA, XAR United States
    ATC, CHA, DSA, DSG, DSH, FKR, XAG
    		F966U1OYMDCZJB 2026-11-05 17.176 GiB
    SM-F966U1_3_20261020084811_ex3k5bxork_fac.zip
    		Download

    No matching downloads

    How to flash F966U1UEUDCZJB

    • F966U1UEUDCZJB has bootloader binary D (13). Your device must run binary D (13) 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.

    What's new in F966U1UEUDCZJB

    • Stability and reliability
    Device behavior has been improved.
    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Security patch: October 2026

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    Most severe Samsung fixes:

    • high Out-of-bounds write in libsmkvextractor.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21114)
    • high Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code with system privilege. (CVE-2026-21120)
    • high Out-of-bounds write in libsamsungtts.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21122)

    All fixes and Galaxy models with this patch

    Rollout of F966U1UEUDCZJB by region

    First release
    November 5, 2026
    Last region
    November 6, 2026
    Duration
    2 days
    Regions
    19
    1. Day 1 · · 16 regions
      United StatesACGAIOATTCCTLRATFNTMBTMKUSCVZWXAAXARATCCHAFKRXAG
    2. Day 2 · · 3 regions
      DSADSGDSH

    Device specifications

    • Launched withAndroid 16.0
    • Display diagonal20.3 cm (8")
    • Display resolution2184 x 1968 pixels
    • RAM12 GB
    • Rear camera resolution200 MP
    • Rear camera typeTriple camera
    • Battery capacity4400 mAh
    • Weight215 g

    Specifications of SM-F966B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    F966U1UEUDCZJB is Android 17 firmware for Samsung Galaxy Z Fold7, released for 8 countries, 19 CSC codes. It includes the 2026-10-05 security patch. Samsung built it on 2026-10-20.

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    Yes. F966U1UEUDCZJB is the newest build for SM-F966U1 on SamFirm. The previous build was F966U1UESDCZJ1.

    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 17.176 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Z Fold7 must be on bootloader binary D (13) or lower.

    This build uses bootloader binary D (13). It can be flashed on a Samsung Galaxy Z Fold7 running binary D (13) or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 1 other build of this model uses the same binary, so you can switch between them in both directions.

    Other builds and changelog for Samsung Galaxy Z Fold7

    • Stability and reliability
    Device behavior has been improved.
    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 9
    Galaxy AI

    Enhanced Now nudge
    Now nudge provides helpful suggestions in more places throughout your Galaxy experience. In addition to the keyboard, suggestions will now appear in conversation notifications and in a floating button in the bottom right corner of the screen. There are also several new types of suggestions, like entering reservation details or addresses and saving places in Google Maps.

    Focus on someone important
    My FanCam lets you select a person in a video and follow...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • The security of your device has been improved.

    Show 13 older builds

    • Stability and reliability
    Device behavior has been improved.
    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 8.5
    Visual design

    Fresh new look
    One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalization for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualization, One UI delivers a design that feels both personal and relatable, helping you focus...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • Check stock prices without unlocking
    Stocks you follow on Google Finance with big price changes will appear on your Now bar at the end of the trading day.
    • Do more in DeX on connected displays
    You can now add widgets to your Home screen when using DeX on a connected display as well as control settings for the mouse and on-screen keyboard.
    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer envi...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Model firmware by region

    New firmware for other devices

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