Samsung Galaxy A36 5G A366EXXU4BYI7

Samsung Galaxy A36 5G A366EXXU4BYI7 Firmware

Samsung Galaxy A36 5G A366EXXU4BYI7 is an Android 16 firmware for 17 countries, 30 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 A366EXXS4AYH9 https://samfirm.shop/build/A366EXXS4AYH9: Android updated from Android 15 to Android 16; security patch 2025-09-01 instead of 2025-08-01. A newer build for SM-A366E is available: A366EXXUCDZIF https://samfirm.shop/build/A366EXXUCDZIF.

OS updates guaranteed until: Android 21. Security updates until: Mar 26, 2031
9.3/10 (31)8,308 times
Android 16
OS Version
2025-09-09
First release
other regions until 2025-09-17
2025-09-01
Security patch
17
Countries
30
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 A36 5G use bootloader binary C (12) (latest: A366EXXUCDZIF https://samfirm.shop/build/A366EXXUCDZIF). If your device already runs binary C (12), 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#.
    Your CSC is in Settings → About phone (About tablet) → Software information, or dial *#1234#. The CSC sets your region's features and network bands. Download the firmware for your country.
    4
    MODEM/CP Version: A366EXXU4BYI7
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-A366E
    CDR Dominican Republic
    CTP Paraguay
    CTU, UFU Uruguay
    MXO Mexico
    +2 more countries
    PSN Argentina
    ZTA Brazil
    A366EOWO4BYI7 2025-09-10 2025-10-01 10.184 GiB
    SM-A366E_1_20250910034411_sitypte0kp_fac.zip
    SM-A366E
    CGU, PGU Guatemala
    CHE, CHL, CHO, CHT, CRC Chile
    COB, COL, COO Colombia
    DOR Dominican Republic
    +4 more countries
    EBE, ECO Ecuador
    EON Trinidad & Tobago
    PEO, PET, PNT, SAM Peru
    GLO
    A366EOWB4BYI7 2025-09-17 2025-10-06 9.993 GiB
    SM-A366E_1_20250917225811_fuj2x5a255_fac.zip
    SM-A366E
    INS India
    NPB Nepal
    SLK Sri Lanka
    A366EODM4BYI7 2025-09-09 2025-09-30 9.967 GiB
    SM-A366E_1_20250909203341_f6e1hj5py7_fac.zip
    SM-A366E
    SER Russia
    A366EOXE4BYI7 2025-09-09 2025-09-29 9.938 GiB
    SM-A366E_1_20250909155951_c3shxk4y8e_fac.zip

    No matching downloads

    How to flash A366EXXU4BYI7

    • A366EXXU4BYI7 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.

    What's new in A366EXXU4BYI7

    One UI 8.0 (Android 16)
    Productivity

    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.

    Easier file sharing with Quick Share
    It's never been easier to send and receive files. Tap the Quick Share button in quick settings to get started. You can receive files while the Quick Share screen is open and send files to others directly from Quick Share.

    Sticky notes
    Add quick annotations on top of documents in Samsung Notes. There's no limit to the number of sticky notes you can add, and it's easy to remove them later without disturbing the original document.

    Find downloads fast
    You can now filter files based on the app that was used to download them. Works in the Downloaded and Recent views in My Files.

    Redesigned Samsung Internet
    Access the features you need quickly. The Samsung Internet menu has been optimized to make it easy to access the features you use most. You can also customize the layout to match your personal preferences.

    Scientific calculator in portrait view
    Use the scientific calculator without the need to rotate the screen. The scientific calculator now works in portrait view in addition to landscape.

    Multitasking

    Enhanced split screen view
    While 2 apps are open in split screen view, you can push one app against the edge of the screen to keep it partially visible while giving most of your focus to the other app. Tap the smaller app any time to switch between them quickly.

    Reminder

    New Reminder interface
    The Reminder app has been redesigned with categories shown at the top of the screen, making it easier to see how many reminders are in each category with a quick glance. Custom categories can be hidden with a quick tap to free up more screen space. Tap one more time to make them appear again.

    New sample reminders
    Discover the power of reminders. Sample reminder templates are now available in the Reminder app. Explore these reminders to see what you can do to manage important tasks in your life.

    Add reminders easily
    It's never been easier to add new reminders. Just type your reminder into the box at the bottom of the screen. Suggestions will appear as you type that you can tap to save time. You can add checklists, locations, and pictures using the buttons below the text box. Or, if you don't want to type at all, tap the Mic icon for voice input.

    Calendar

    Manage reminders in Calendar
    You can easily create reminders in the Calendar app without opening the Reminder app. Whenever you tap the + button, you'll have the choice of adding an event or a reminder. You can also drag and drop reminders on your calendar to reschedule them.

    Add events quickly
    When you start adding an event in the quick add menu, you'll get suggestions for event names and times based on your past events. Just tap one of the suggestions to add an event without additional typing.

    Samsung Health

    Running coach
    Whether you're a beginner or an experienced runner, the new Running coach feature in Samsung Health provides personalized training programs and tips to help you run farther and faster while minimizing the risk of injury. Works with Galaxy Watch7 or higher.

    Bedtime guidance
    Get to sleep at the right time so you wake up feeling refreshed. The new Bedtime guidance feature analyzes your sleep data and recommends the best time to go to sleep each night.

    Running challenges
    In addition to step challenges, you can now challenge your friends to run. You can set a target distance and see who gets there the fastest or set a time limit and see who runs the farthest.

    Check your antioxidant intake
    The Antioxidant index (Labs) feature uses your Galaxy Watch to detect the level of carotenoids in your skin. Carotenoids are a type of antioxidant contained in fruits and vegetables that can help prevent physical aging. Works with Galaxy Watch8 and Galaxy Watch Ultra.

    Food recording reminders
    Stay on track to meet your calorie goals. You can now set reminders for recording your food intake in Samsung Health.

    Track your vascular load
    Use your Galaxy Watch to measure your vascular load, which is the amount of stress on your blood vessels. First, create a baseline measurement by wearing your watch while sleeping for at least 3 days, then you'll be able to see when your vascular load gets higher or lower over time. Works with Galaxy Watch8 and Galaxy Watch Ultra.

    Photo and video

    Swipe up or down to open quick controls
    Access quick controls in Camera even quicker than before by swiping up or down anywhere in the preview area. In Camera settings, change the Swipe up/down option to open quick controls.

    Audio enhancements

    Quick access to Galaxy Buds settings
    It's easier than ever before to control your Galaxy Buds. You can now adjust Buds settings directly from your phone's Settings without the need to open the Galaxy Wearable app.

    Communication

    See calls on the screen
    Call captions show what each person says on the screen in real time during calls. Follow the conversation on your screen to make sure you don’t miss anything.

    Improved profile cards
    It's easier to create and edit your profile card to get the perfect layout for your name and picture. After creating, you can share your profile card so other people can see it when you call them.

    Review recorded calls in Contacts
    It's now easier to review your past conversations. Calls you've recorded now appear on the contact history screen.

    Security and privacy

    Enhanced Secure Folder
    Keep sensitive apps and data in a separate, protected area of your phone. You can now set Secure Folder to close apps and prevent notifications when you lock it. You can also completely hide and encrypt your Secure Folder for maximum protection.

    Stronger account security
    Knox Matrix regularly scans devices signed in to your Samsung account for security risks. When a serious risk is found on a device, that device will be automatically signed out of your Samsung account to protect the security risk from spreading to your account and other devices. You can check the security status of your devices any time in Security and privacy settings.

    Show or hide notification content while locked
    The option to show or hide notification content while your phone is locked is now located in Notifications settings. Choose to show content for quick access to notifications without unlocking your phone, or choose to hide content to keep your notifications private and prevent others from seeing them.

    Accessibility

    Pinch and zoom with the Assistant menu
    The Assistant menu now provides more ways to zoom in and out on the screen. In addition to dragging with one finger, you can now adjust the zoom level by pressing buttons on the screen.

    Control mouse actions with your keyboard
    If you can't or don't want to use a mouse, turn on Mouse keys in Accessibility settings to use your physical keyboard to move the mouse pointer, click, hold, and scroll.

    Magnify your keyboard
    You can now make the keys on the on-screen keyboard larger so they're easier to see and tap. Turn on Magnify keyboard while typing in Magnification settings to try it.

    Easily pair Bluetooth hearing aids
    You can now pair and connect your Bluetooth hearing aid devices directly on the Hearing aid support screen in Accessibility settings.

    Modes and routines

    New preset routines
    Check out the new preset routines for weather and other advanced conditions. Use them as they are, or customize them to meet your needs.

    New routine actions
    New actions are available for getting data from the Clock, Calendar, and Samsung Notes apps. After you get data, you can use it in other conditions or actions in your routine.

    Even more improvements

    Easily organize alarms
    You can now add existing alarms to an alarm group by tapping the + button on the Alarm group screen. You can also add an alarm group to a widget on your Home screen so you can turn all of the alarms in the group on or off with a single tap.

    Enhanced app notification settings
    You can now choose the pop-up notification style for each app separately in the app’s notification settings.

    Revamped weather visuals
    The Weather app now provides more rich and realistic images to help you intuitively understand the current weather conditions.

    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 A366EXXU4BYI7 by region

    First release
    September 29, 2025
    Last region
    November 28, 2025
    Duration
    61 days
    Regions
    30
    1. Day 1 · · 1 region
      RussiaSER
    2. Day 2 · · 3 regions
      IndiaINSNepalNPBSri LankaSLK
    3. Day 3 · · 1 region
      MexicoMXO
    4. Day 4 · · 1 region
      BrazilZTA
    5. Day 8 · · 3 regions
      ColombiaCOBCOLCOO
    6. Day 12 · · 1 region
      GuatemalaCGU
    7. Day 30 · · 1 region
      Dominican RepublicCDR
    8. Day 32 · · 4 regions
      PeruPEOPETPNTSAM
    9. Day 33 · · 1 region
      GuatemalaPGU
    10. Day 36 · · 7 regions
      ChileCHECHLCHOCHTCRCDominican RepublicDORGLO

    Release days not shown: 2.

    Device specifications

    • Launched withAndroid 15
    • Display diagonal17 cm (6.7")
    • Display resolution1080 x 2340 pixels
    • RAM6 GB
    • Rear camera resolution50 MP
    • Rear camera typeTriple camera
    • Battery capacity5000 mAh
    • Weight195 g

    Specifications of SM-A366B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    A366EXXU4BYI7 is Android 16 firmware for Samsung Galaxy A36 5G, released for 17 countries, 30 CSC codes. It includes the 2025-09-01 security patch. Samsung built it on 2025-09-09.

    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-A366E is available: A366EXXUCDZIF. Install it instead of A366EXXU4BYI7 unless you need this exact version. The previous build was A366EXXS4AYH9.

    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 A36 5G must be on bootloader binary 4 or lower.

    This build uses bootloader binary 4. It can be flashed on a Samsung Galaxy A36 5G running binary 4 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 3 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 A36 5G

    One UI 9
    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.

    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 a...

    https://samfirm.shop/build/A366EXXSCCZI1

    • Security
    The device is protected with improved security.

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

    https://samfirm.shop/build/A366EXXU9CZDF
    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...

    https://samfirm.shop/build/A366EXXS9BZDB

    • Security
    The device is protected with improved security.

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