SM-F731N 1 country Android 16

Samsung Galaxy Z Flip5 F731NKSS6FZB2 Firmware

Name: Samsung Galaxy Z Flip5 (SM-F731N)
Brand: Samsung
Availability: InStock

Samsung Galaxy Z Flip5 F731NKSS6FZB2 is an Android 16 firmware for South Korea (KOO, KTC, LUC, SKC). 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 F731NKSS5FZA1: bootloader binary raised from 5 to 6, so after installing it there is no way back to older builds. A newer build for SM-F731N is available: F731NKSU6HZIJ.

OS updates guaranteed until: Android 17Security updates until: Jul 24, 2028

9.1/10 (142)3,662 times

Android 16

OS Version

2026-02-26

Build Date

n/a

Security patch

Countries

CSC codes

Bootloader binary

Bootloader binary 6. 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.

Will it work on my device?

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.

MODEM/CP Version: F731NKSS6FZB1

Model	Region	CSC Version	Release date	Size	File name	Download
SM-F731N	KOO, KTC, LUC, SKC South Korea	F731NOKR6FZB2	2026-02-26	10.066 GiB	SM-F731N_4_20260214143821_lrmh6r1rag_fac.zip

Device specifications

Launched withAndroid 13
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-F731B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

How to flash F731NKSS6FZB2

Install Samsung USB Drivers:Download Official Drivers
Download Odin Flash Tool:

F731NKSS6FZB2 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.

Frequently Asked Questions

F731NKSS6FZB2 is Android 16 firmware for Samsung Galaxy Z Flip5, released for South Korea (KOO, KTC, LUC, SKC). Samsung built it on 2026-02-26.

No. A newer build for SM-F731N is available: F731NKSU6HZIJ. Install it instead of F731NKSS6FZB2 unless you need this exact version. The previous build was F731NKSS5FZA1.

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 10.066 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Z Flip5 must be on bootloader binary 6 or lower.

This build uses bootloader binary 6. It can be flashed on a Samsung Galaxy Z Flip5 running binary 6 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 17 other builds of this model use the same binary, so you can switch between them in both directions.