Samsung Galaxy A36 5G A366EXXS6BYL1
SM-A366E 15 countries Android 16

Samsung Galaxy A36 5G A366EXXS6BYL1 Firmware

Samsung Galaxy A36 5G A366EXXS6BYL1 is an Android 16 firmware for 15 countries, 43 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 A366EXXU5BYK5: bootloader binary raised from 5 to 6, so after installing it there is no way back to older builds; security patch 2025-12-01 instead of 2025-11-01. A newer build for SM-A366E is available: A366EXXUCDZIF.

OS updates guaranteed until: Android 21Security updates until: Mar 26, 2031
9.1/10 (37)10,205 times
Android 16
OS Version
2025-12-13
Build Date
2025-12-01
Security patch
15
Countries
43
CSC codes
6
Bootloader binary

Bootloader binary 6. 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). 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.
    2
    MODEM/CP Version: A366EXXS6BYL1
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-A366E
    ARO, CTI, PSN, PSP, UFN Argentina
    BVO Bolivia
    CDR Dominican Republic
    CTP, TGP Paraguay
    +5 more countries
    CTU, UFU, UPO, UYO Uruguay
    GTO Guatemala
    IUS, MXO, TCE, TMM Mexico
    TPA Panama
    ZTA, ZTM, ZTO, ZVV Brazil
    		A366EOWO6BYL1 2025-12-30 10.127 GiB
    SM-A366E_2_20251213044841_prj1zluvbr_fac.zip
    SM-A366E
    CGU, PGU Guatemala
    CHE, CHL, CHO, CHT, CRC Chile
    COB, COL, COM, COO Colombia
    DOR Dominican Republic
    +4 more countries
    EBE, ECO Ecuador
    EON Trinidad & Tobago
    PEO, PET, PNT, SAM Peru
    GLO
    		A366EOWB6BYL1 2025-12-30 9.949 GiB
    SM-A366E_2_20251213050011_b3t2dqfju8_fac.zip

    No matching downloads

    How to flash A366EXXS6BYL1

    • A366EXXS6BYL1 has bootloader binary 6. Your device must run binary 6 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 A366EXXS6BYL1

    • 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 A366EXXS6BYL1 by region

    First release
    December 30, 2025
    Last region
    January 6, 2026
    Duration
    8 days
    Regions
    43
    1. Day 1 · · 39 regions
      ArgentinaAROCTIPSNPSPUFNBoliviaBVOBrazilZTAZTMZTOZVVChileCRCColombiaCOBCOLCOMCOODominican RepublicCDRDOREcuadorEBEECOGuatemalaCGUGTOPGUMexicoIUSMXOTCETMMPanamaTPAParaguayCTPTGPPeruPEOPETPNTSAM
      +3 more countries
      Trinidad & TobagoEONUruguayCTUUFUUPOUYOGLO
    2. Day 8 · · 4 regions
      ChileCHECHLCHOCHT

    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

    A366EXXS6BYL1 is Android 16 firmware for Samsung Galaxy A36 5G, released for 15 countries, 43 CSC codes. It includes the 2025-12-01 security patch. Samsung built it on 2025-12-13.

    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-A366E is available: A366EXXUCDZIF. Install it instead of A366EXXS6BYL1 unless you need this exact version. The previous build was A366EXXU5BYK5.

    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 6 or lower.

    This build uses bootloader binary 6. It can be flashed on a Samsung Galaxy A36 5G running binary 6 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". No other build of this model uses binary 6.

    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...

    • 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.

    Model firmware by region