SM-F966U1 8 countries Android 17

Samsung Galaxy Z Fold7 F966U1UEUCCZIH Firmware

Samsung Galaxy Z Fold7 F966U1UEUCCZIH 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 F966U1UESCBZH3: Android updated from Android 16 to Android 17; security patch 2026-09-05 instead of 2026-08-05. A newer build for SM-F966U1 is available: F966U1UESDCZJ1.

OS updates guaranteed until: Android 23. Security updates until: Jul 23, 2032
8.8/10 (26)3,226 times
Android 17
OS Version
2026-09-20
Build Date
2026-09-05
Security patch
8
Countries
19
CSC codes
C (12)
Bootloader binary

Bootloader binary C (12). Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy Z Fold7 use bootloader binary D (13) (latest: F966U1UESDCZJ1). 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: F966U1UEUCCZIH
    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
    F966U1OYMCCZIH 2026-10-06 17.162 GiB
    SM-F966U1_2_20260920235820_hk0mrq4pnm_fac.zip

    No matching downloads

    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.

    What's new in F966U1UEUCCZIH

    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 them automatically while cropping out the rest of the video.

    Interpreter keeps your conversation in front of you
    In conversation mode, you can scroll through the whole conversation while you’re still talking.

    See useful information during calls
    See relevant events and other information related to your current call on the call screen.

    Productivity and multitasking

    More customizable quick panel
    You can now rearrange and customize the controls in your quick panel even more than before. You can change the size of the brightness and volume sliders as well as the media player. You can also separate the sound mode button from the volume slider.

    Easier multi-window controls
    Switching your view is now even easier. Just touch and hold the handle at the top of any app, then drag down, to open it in a window, or drag it to any screen edge to switch to split screen view.

    Recent apps on Home screen
    Turn on Show recent or suggested apps in Home screen Settings, and apps you've used recently will appear on the taskbar at the bottom of the Home screen so you can switch back to them quickly.

    Separate Auto rotate settings
    Control Auto rotate separately for the main screen and cover screen. You can set the rotation option for each screen in the quick panel.

    Split screen for Now nudge
    When you tap on a Now nudge suggestion on a large screen, the resulting action will appear in split-screen view so you can get things done without leaving your current task.

    Privacy, security, and device protection

    Warranty and care
    The new Warranty and care menu in settings lets you check your warranty information and access diagnostic checks and useful information for keeping your Galaxy in top condition.

    Lock down your phone quickly
    It's now easier to securely lock your phone in a hurry. Just press and hold the Volume down and Side buttons at the same time or tap the Power button in the quick panel. This prevents biometrics from being used the next time you unlock your phone.

    Location access transparency
    Stay on top of your location privacy. A blue indicator will appear at the top of the screen when an app accesses your location. Tap the indicator in the quick panel to see which app it is.

    Stronger security and privacy protection
    Alerts will appear in your Now brief to let you know about risks from malware, apps from unknown sources, unnecessary permissions, and other issues that may put your security and privacy at risk. Apps that have been identified as malicious or vulnerable will be blocked from opening until you make a decision about whether to remove them.

    AI privacy alerts
    Get help protecting your personal data. AI will monitor how apps use permissions and notify you about unnecessary access to your personal data.

    Samsung Health

    New look for Samsung Health
    Samsung Health has been redesigned to make your health data easier to understand. Enjoy clearer visuals, improved charts, and a more engaging experience to help you reach your health goals.

    Customize your Health home screen
    Resize cards and organize them by category, like Activity, Sleep, Mindfulness, and Nutrition, so your top priorities are easy to access.

    Log health data quickly
    It's now easier to add your health information right from the Samsung Health home screen. You can log your mood, meals, and more. You can even use the camera for faster input.

    Advanced trend analysis
    Track your progress with improved trend charts in Samsung Health. View data in hourly, daily, or weekly intervals, pinch to zoom in for a closer look, and overlay multiple charts to compare your performance across different periods.

    Monitor changes in your sleep vitals
    Samsung Health helps you notice meaningful changes in your sleep health data. Use Galaxy Watch or Ring measurements to better understand your daily health patterns.

    Manage your heart health
    Track key health metrics and lifestyle factors that affect your heart. A daily score based on your sleep, exercise, BMI, and blood pressure helps you better understand your current heart health trends.

    Track your cardio load
    See how your workouts and activity impact your heart so you'll know when to push harder and when to rest. Your target cardio load range adjusts daily based on your recent activity and training focus.

    Check your fitness index
    Your Fitness Index is an overall score calculated using five key fitness metrics: body composition, cardio, strength, flexibility, and endurance. Set a goal and unlock personalized insights tailored to your results.

    Keep your ears safe
    The new Hearing tracker monitors sound levels detected by your Galaxy Watch and headphone audio levels to help you manage your exposure to loud sounds.

    View your cycle and body rhythm
    Get a more personalized view of your cycle and body rhythm with new cycle tracking options. You can view your cycle information in your calendar and better understand your health patterns.

    Bixby

    Manage your conversations
    Keep your chats organized. Search them, rename them, or pin your favorites. You can also delete all of your past conversations at once.

    Bixby on the Home screen
    Add a Bixby widget to type or talk to Bixby or jump directly to your conversation history.

    Accessibility

    Discover new Accessibility features
    Check the What's new menu in Accessibility settings to learn about and try the latest Accessibility features for your Galaxy.

    Text spotlight for easier reading
    Need a closer look? Tap any text on the screen to show it enlarged and highlighted in its own window. You can also customize the font size, colors, and other settings to match your preferences.

    Physical keyboard shortcuts
    Use shortcuts on your physical keyboard to access the Accessibility settings you need without touching the screen.

    Mouse keys enhancements
    New options are available when using your keyboard for mouse interactions including speed and acceleration control. You can also use the keyboard's number pad to point and click.

    Replace swipe with single tap
    The Replace swipe with single tap option is now located in the Dexterity and interaction menu instead of the Assistant menu for easier access.

    Select to speak
    Get quick audio readouts without turning on full TalkBack. With the new Select to speak feature, you can select an item on your screen, like text or an image, and hear it read or described out loud.

    Improved TalkBack updates
    TalkBack updates can now be applied with a simple app update from the Play Store, helping you get the latest accessibility features and enhancements.

    Even more improvements

    Scan documents on large screens
    Document Scan is now optimized for large screens, making it easier to view and manage scanned documents on tablets and foldable devices. Check the thumbnail view on the left side of the screen to easily review your scanned documents and switch between pages.

    New Lock screen clock
    The default clock on your Lock screen has been redesigned with a cleaner and more modern look that adapts to match your wallpaper.

    Samsung DeX enhancements
    It's easier to move an app window from one desktop to another using the menu at the top of the window. Desktop previews are now available at the top of the Recents screen, making it easier to switch with a single tap.

    How to flash F966U1UEUCCZIH

    • F966U1UEUCCZIH has bootloader binary C (12). Your device must run binary C (12) 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.

    Frequently Asked Questions

    F966U1UEUCCZIH is Android 17 firmware for Samsung Galaxy Z Fold7, released for 8 countries, 19 CSC codes. It includes the 2026-09-05 security patch. Samsung built it on 2026-09-20.

    No. A newer build for SM-F966U1 is available: F966U1UESDCZJ1. Install it instead of F966U1UEUCCZIH unless you need this exact version. The previous build was F966U1UESCBZH3.

    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 17.162 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Z Fold7 must be on bootloader binary C (12) or lower.

    This build uses bootloader binary C (12). It can be flashed on a Samsung Galaxy Z Fold7 running binary C (12) 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

    • 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.

    • 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.

    Show 12 older builds

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • Security
    The device is protected with improved security.

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