Samsung Galaxy A06 5G A066MUBS4BYL1
SM-A066M 7 countries Android 16

Samsung Galaxy A06 5G A066MUBS4BYL1 Firmware

First release:

Samsung Galaxy A06 5G A066MUBS4BYL1 is an Android 16 firmware for 7 countries, 18 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 A066MUBU4BYJ4: security patch 2025-12-01 instead of 2025-11-01. A newer build for SM-A066M is available: A066MUBU9DZJ7.

Download firmware
9.0 (47)4,672 times
Android 16
OS Version
2025-12-20
First release
other regions until 2025-12-23
2025-12-01
Security patch
7
Countries
18
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 A06 5G use bootloader binary 9 (latest: A066MUBU9DZJ7). If your device already runs binary 9, 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.
    2
    MODEM/CP Version: A066MUBS4BYL1
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-A066M
    CDR Dominican Republic
    CHE, CHL, CHO, CHT Chile
    GTO, PGU Guatemala
    PEO, PNT, SAM Peru
    		A066MOWB4BYL1 2025-12-20 2025-12-30 6.656 GiB
    SM-A066M_2_20251220050241_7uy56n23q5_fac.zip
    		Download
    SM-A066M
    CTU, UFU, UYO Uruguay
    TCE Mexico
    ZTA, ZTM, ZTO, ZVV Brazil
    		A066MOWO4BYL1 2025-12-23 2026-01-06 6.648 GiB
    SM-A066M_2_20251223233341_a2xijvux10_fac.zip
    		Download

    No matching downloads

    How to flash A066MUBS4BYL1

    • A066MUBS4BYL1 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 A066MUBS4BYL1

    • 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: December 2025

    SMR Dec-2025 fixes 65 vulnerabilities, 6 of them critical. Android Security Bulletin: 57, Samsung-specific issues (SVE): 8.

    Most severe Samsung fixes:

    • high Out-of-bounds write in decoding metadata in fingerprint trustlet (CVE-2025-21072)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-58477)
    • high Out-of-bounds write in libimagecodec.quram.so (CVE-2025-58478)

    All fixes and Galaxy models with this patch

    Rollout of A066MUBS4BYL1 by region

    First release
    December 30, 2025
    Last region
    January 7, 2026
    Duration
    9 days
    Regions
    18
    1. Day 1 · · 1 region
      GuatemalaGTO
    2. Day 8 · · 10 regions
      BrazilZTAZTMZTOZVVDominican RepublicCDRGuatemalaPGUMexicoTCEUruguayCTUUFUUYO
    3. Day 9 · · 7 regions
      ChileCHECHLCHOCHTPeruPEOPNTSAM

    Frequently Asked Questions

    A066MUBS4BYL1 is Android 16 firmware for Samsung Galaxy A06 5G, released for 7 countries, 18 CSC codes. It includes the 2025-12-01 security patch. Samsung built it on 2025-12-20.

    SMR Dec-2025 fixes 65 vulnerabilities, 6 of them critical. Android Security Bulletin: 57, Samsung-specific issues (SVE): 8.

    No. A newer build for SM-A066M is available: A066MUBU9DZJ7. Install it instead of A066MUBS4BYL1 unless you need this exact version. The previous build was A066MUBU4BYJ4.

    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 A06 5G must be on bootloader binary 4 or lower.

    This build uses bootloader binary 4. It can be flashed on a Samsung Galaxy A06 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 A06 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...

    • 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.

    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 o...

    Show 7 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.

    • Security
    The device is protected with improved security.

    • Stability and reliability
    Device behavior has been improved.

    No changelog details available.
    Model firmware by region

    New firmware for other devices

    All latest builds