Samsung Galaxy Z Flip4 F721U1UESAIZE2
SM-F721U1 8 countries Android 16

Samsung Galaxy Z Flip4 F721U1UESAIZE2 Firmware

Samsung Galaxy Z Flip4 F721U1UESAIZE2 is an Android 16 firmware for 8 countries, 19 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 F721U1UES9IZD1: bootloader binary raised from 9 to A (10), so after installing it there is no way back to older builds; security patch 2026-05-05 instead of 2026-04-05. A newer build for SM-F721U1 is available: F721U1UESAIZH2.

OS updates guaranteed until: Android 16Security updates until: Jul 29, 2027
Download firmware
9.0/10 (89)12,506 times
Android 16
OS Version
2026-05-08
First release
other regions until 2026-05-14
2026-05-05
Security patch
8
Countries
19
CSC codes
A (10)
Bootloader binary

Bootloader binary A (10). 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#.
    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: F721U1UESAIZE2
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-F721U1
    ACG, AIO, ATT, CCT, LRA, TFN, TMB, TMK, USC, VZW, XAA, XAR United States
    ATC, CHA, DSA, DSH, FKR, XAG
    		F721U1OYMAIZE2 2026-05-08 2026-05-26 8.874 GiB
    SM-F721U1_5_20260508221801_qwu2mgsdmp_fac.zip
    SM-F721U1
    PCT Puerto Rico
    		F721U1OWAAIZE2 2026-05-14 2026-05-27 8.967 GiB
    SM-F721U1_5_20260514030640_248jda70ea_fac.zip

    No matching downloads

    How to flash F721U1UESAIZE2

    • F721U1UESAIZE2 has bootloader binary A (10). Your device must run binary A (10) 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 F721U1UESAIZE2

    • 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: May 2026

    SMR May-2026 fixes 36 vulnerabilities, 2 of them critical. Android Security Bulletin: 29, Samsung-specific issues (SVE): 7.

    Most severe Samsung fixes:

    • high Improper input validation in FacAtFunction in Galaxy Watch prior to SMR May-2026 Release 1 allows local attacker to execute arbitrary code with system privilege. (CVE-2026-21019)

    All fixes and Galaxy models with this patch

    Rollout of F721U1UESAIZE2 by region

    First release
    May 26, 2026
    Last region
    May 27, 2026
    Duration
    2 days
    Regions
    19
    1. Day 1 · · 18 regions
      United StatesACGAIOATTCCTLRATFNTMBTMKUSCVZWXAAXARATCCHADSADSHFKRXAG
    2. Day 2 · · 1 region
      Puerto RicoPCT

    Device specifications

    • Launched withAndroid 12
    • Display diagonal17 cm (6.7")
    • Display resolution2640 x 1080 pixels
    • RAM8 GB
    • Rear camera resolution12 MP
    • Rear camera typeDual camera
    • Battery capacity3700 mAh
    • Weight187 g

    Specifications of SM-F721B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    F721U1UESAIZE2 is Android 16 firmware for Samsung Galaxy Z Flip4, released for 8 countries, 19 CSC codes. It includes the 2026-05-05 security patch. Samsung built it on 2026-05-08.

    SMR May-2026 fixes 36 vulnerabilities, 2 of them critical. Android Security Bulletin: 29, Samsung-specific issues (SVE): 7.

    No. A newer build for SM-F721U1 is available: F721U1UESAIZH2. Install it instead of F721U1UESAIZE2 unless you need this exact version. The previous build was F721U1UES9IZD1.

    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 Z Flip4 must be on bootloader binary A (10) or lower.

    This build uses bootloader binary A (10). It can be flashed on a Samsung Galaxy Z Flip4 running binary A (10) 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 Z Flip4

    • 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...

    • Security
    The device is protected with improved security.

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

    • The security of your device has been improved.

    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...

    Show 3 older builds

    • The security of your device has been improved.

    Model firmware by region