SM-S948C 2 countries Android 16

Samsung Galaxy S26 Ultra S948CONU1AZCF Firmware

Samsung Galaxy S26 Ultra S948CONU1AZCF is an Android 16 firmware for RKT, SJP. 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 S948CONU1AZAI, Android and the bootloader binary are unchanged, so you can switch between the two in both directions. A newer build for SM-S948C is available: S948CONU1BZI9.

OS updates guaranteed until: Android 23Security updates until: Feb 26, 2033
9.4/10 (30)531 times
Android 16
OS Version
2026-03-16
Build Date
2026-02-05
Security patch
2
Countries
2
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: S948CONU1AZCF
    ModelRegionCSC VersionRelease dateSizeFile nameDownload
    SM-S948C
    RKT, SJP
    		S948CQKT1AZCF 2026-03-26 17.479 GiB
    SM-S948C_1_20260316084900_hnec1r11id_fac.zip

    No matching downloads

    How to flash S948CONU1AZCF

    • S948CONU1AZCF 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 S948CONU1AZCF

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

    Security patch: February 2026

    SMR Feb-2026 fixes 32 vulnerabilities, 0 of them critical. Android Security Bulletin: 25, Samsung-specific issues (SVE): 7.

    Most severe Samsung fixes:

    • high Improper access control in Emergency Sharing prior to SMR Feb-2026 Release 1 allows local attackers to interrupt its functioning. (CVE-2026-20977)
    • high Improper export of android application components in Samsung Dialer prior to SMR Feb-2026 Release 1 allows local attackers to launch arbitrary activity with Samsung Dialer privilege. (CVE-2026-20983)
    • high Improper authorization in KnoxGuardManager prior to SMR Feb-2026 Release 1 allows local attackers to bypass the persistence configuration of the application. (CVE-2026-20978)

    All fixes and Galaxy models with this patch

    Rollout of S948CONU1AZCF by region

    Samsung released this build in all regions (2) on the same day, March 26, 2026.

    Device specifications

    • Launched withAndroid 16.0
    • Display diagonal17.5 cm (6.9")
    • Display resolution3120 x 1440 pixels
    • RAM12 GB
    • Rear camera resolution200 MP
    • Rear camera typeQuad camera
    • Battery capacity5000 mAh
    • Weight214 g

    Specifications of SM-S948B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    S948CONU1AZCF is Android 16 firmware for Samsung Galaxy S26 Ultra, released for RKT, SJP. It includes the 2026-02-05 security patch. Samsung built it on 2026-03-16.

    SMR Feb-2026 fixes 32 vulnerabilities, 0 of them critical. Android Security Bulletin: 25, Samsung-specific issues (SVE): 7.

    No. A newer build for SM-S948C is available: S948CONU1BZI9. Install it instead of S948CONU1AZCF unless you need this exact version. The previous build was S948CONU1AZAI.

    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 17.479 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy S26 Ultra must be on bootloader binary 1 or lower.

    This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy S26 Ultra 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 Galaxy S26 Ultra

    One UI 9
    Galaxy AI

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    Now nudge provides helpful suggestions in more places throughout your Galaxy experience. In addition to the keyboard, suggestions will now appear in conversation notifications and in a floating button in the bottom right corner of the screen. There are also several new types of suggestions, like entering reservation details or addresses and saving places in Google Maps.

    Focus on someone important
    My FanCam lets you select a person in a video and follow...

    • 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.

    No changelog details available.
    Model firmware by region