Samsung Watch9 44mm L350ZCU1AZJ3
SM-L350 1 country Wear OS 7.0

Samsung Watch9 44mm L350ZCU1AZJ3 Firmware

Samsung Watch9 44mm L350ZCU1AZJ3 is an Wear OS 7.0 firmware for China (CHC). 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 L350XXS1AZH4: security patch 2026-10-05 instead of 2026-08-05. A newer build for SM-L350 is available: L350XXU1AZJ3.

Download firmware
9.0/10 (29)85 times
Wear OS 7.0
OS Version
2026-11-05
Build Date
2026-10-05
Security patch
1
Countries
1
CSC codes
1
Bootloader binary

Bootloader binary 1. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

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: L350ZCU1AZJ3
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-L350
    CHC China
    		L350CHC1AZJ3 2026-11-05 3.315 GiB
    SM-L350_1_20261105135321_4hec206le0_fac.zip
    		Download

    No matching downloads

    How to flash L350ZCU1AZJ3

    • L350ZCU1AZJ3 has bootloader binary 1. Your device must run binary 1 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 L350ZCU1AZJ3

    • Stability and reliability
    Device behavior has been improved.

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

    Security patch: October 2026

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    Most severe Samsung fixes:

    • high Out-of-bounds write in libsmkvextractor.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21114)
    • high Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code with system privilege. (CVE-2026-21120)
    • high Out-of-bounds write in libsamsungtts.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21122)

    All fixes and Galaxy models with this patch

    Device specifications

    • Display diagonal3.81 cm (1.5")
    • Display technologyAMOLED
    • Display resolution480 x 480 pixels
    • RAM2 MB
    • Battery capacity445 mAh
    • Weight34 g
    • Band colourGreen

    Frequently Asked Questions

    L350ZCU1AZJ3 is Wear OS 7.0 firmware for Samsung Watch9 44mm, released for China (CHC). It includes the 2026-10-05 security patch. Samsung built it on 2026-11-05.

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    No. A newer build for SM-L350 is available: L350XXU1AZJ3. Install it instead of L350ZCU1AZJ3 unless you need this exact version. The previous build was L350XXS1AZH4.

    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 3.315 GiB; keep about twice that free on the computer to unzip it. The Samsung Watch9 44mm must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Watch9 44mm running binary 1 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 6 other builds of this model use the same binary, so you can switch between them in both directions.

    Other builds and changelog for Samsung Watch9 44mm

    • Stability and reliability
    Device behavior has been improved.

    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.

    No changelog details available.

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

    Model firmware by region

    New firmware for other devices

    All latest builds