Samsung Galaxy A16 5G A166MUBS3AYC1
SM-A166M 11 countries Android 14

Samsung Galaxy A16 5G A166MUBS3AYC1 Firmware

Samsung Galaxy A16 5G A166MUBS3AYC1 is an Android 14 firmware for 11 countries, 37 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 A166MUBS3AYA2: security patch 2025-03-01 instead of 2025-01-01. A newer build for SM-A166M is available: A166MUBUAEZJ5.

OS updates guaranteed until: Android 22Security updates until: Oct 28, 2032
Download firmware
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Android 14
OS Version
2025-03-25
First release
other regions until 2025-05-07
2025-03-01
Security patch
11
Countries
37
CSC codes
3
Bootloader binary

Bootloader binary 3. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

Newer builds of Samsung Galaxy A16 5G use bootloader binary A (10) (latest: A166MUBUAEZJ5). If your device already runs binary A (10), 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: A166MUBS3AYC1
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-A166M
    ARO, CTI, PSN, UFN Argentina
    CDR, DOR Dominican Republic
    CHE, CHL, CHO, CHT, CHX, CRC Chile
    COB, COL, COM, COO Colombia
    +7 more countries
    CTU, UFU, UPO, UYO Uruguay
    GTO, PGU Guatemala
    IUS, MXO, TCE, TMM Mexico
    PEO, PET, PNT, SAM Peru
    TPA Panama
    ZTA, ZTM, ZTO, ZVV Brazil
    GLO
    		A166MOWO3AYC1 2025-05-07 2025-03-25 5.885 GiB
    SM-A166M_1_20250312222610_hudw2ik3xj_fac.zip
    SM-A166M
    CGU Guatemala
    		A166MOWO3AYC1 2025-04-30 2025-04-30 5.853 GiB
    SM-A166M_2_20241017230751_niursj7urb_fac.zip

    No matching downloads

    How to flash A166MUBS3AYC1

    • A166MUBS3AYC1 has bootloader binary 3. Your device must run binary 3 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 A166MUBS3AYC1

    • The security of your device has been improved.

    Security patch: March 2025

    SMR Mar-2025 fixes 55 vulnerabilities, 11 of them critical. Android Security Bulletin: 49, Samsung-specific issues (SVE): 6.

    Most severe Samsung fixes:

    • high Improper access control in SecSettingsIntelligence (CVE-2025-20903)

    All fixes and Galaxy models with this patch

    Rollout of A166MUBS3AYC1 by region

    First release
    March 25, 2025
    Last region
    May 7, 2025
    Duration
    44 days
    Regions
    37
    1. Day 1 · · 3 regions
      GuatemalaGTOPanamaTPAUruguayUPO
    2. Day 4 · · 13 regions
      ColombiaCOBCOLCOMCOODominican RepublicCDRGuatemalaPGUMexicoIUSMXOTCETMMUruguayCTUUFUUYO
    3. Day 8 · · 8 regions
      ArgentinaAROCTIPSNUFNBrazilZTAZTMZTOZVV
    4. Day 9 · · 4 regions
      PeruPEOPETPNTSAM
    5. Day 11 · · 3 regions
      ChileCRCDominican RepublicDORGLO
    6. Day 37 · · 1 region
      GuatemalaCGU
    7. Day 44 · · 5 regions
      ChileCHECHLCHOCHTCHX

    Device specifications

    • Display diagonal17 cm (6.7")
    • Display resolution1080 x 2340 pixels
    • RAM8 GB
    • Rear camera resolution50 MP
    • Rear camera typeTriple camera
    • Battery capacity5000 mAh
    • Weight200 g

    Specifications of SM-A166B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    A166MUBS3AYC1 is Android 14 firmware for Samsung Galaxy A16 5G, released for 11 countries, 37 CSC codes. It includes the 2025-03-01 security patch. Samsung built it on 2025-03-25.

    SMR Mar-2025 fixes 55 vulnerabilities, 11 of them critical. Android Security Bulletin: 49, Samsung-specific issues (SVE): 6.

    No. A newer build for SM-A166M is available: A166MUBUAEZJ5. Install it instead of A166MUBS3AYC1 unless you need this exact version. The previous build was A166MUBS3AYA2.

    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 A16 5G must be on bootloader binary 3 or lower.

    This build uses bootloader binary 3. It can be flashed on a Samsung Galaxy A16 5G running binary 3 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 4 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 A16 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.

    · Device stability improvements, bug fixes.
    · New and / or enhanced features.
    · Further improvements to performance.

    Show 9 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 8.0 (Android 16)
    Personalization

    Beautiful new wallpapers
    More choices are available to help you find the wallpaper that's right for you. New additions include interactive and dynamic wallpapers like color gradients that change over time.

    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 recei...

    • 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 7.0 Upgrade (Android 15)
    Bold new look

    Visual enhancements
    Enjoy a more sophisticated and unique look. One UI 7 introduces a stunning redesign to key components including buttons, menus, notifications and control bars, providing a more consistent visual experience with curves and circles. Beautiful new colors, soft animations, and an innovative blur effect that's unique to One UI make information hierarchy clearer and help you focus on important information.

    Reimagined Home screen
    Fr...

    • The security of your device has been improved.

    Model firmware by region