Samsung Galaxy Z Flip5 F731NKSS5EYF1 Firmware
Samsung Galaxy Z Flip5 F731NKSS5EYF1 is an Android 15 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 F731NKSS5EYE2: security patch 2025-06-01 instead of 2025-05-01. A newer build for SM-F731N is available: F731NKSU6HZIJ.
OS updates guaranteed until:
Android 17. Security updates until:
Jul 24, 2028
8.8/10 (272)6,754 times
Android 15
OS Version
2025-06-16
Build Date
2025-06-01
Security patch
1
Countries
4
CSC codes
5
Bootloader binary
Bootloader binary 5. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.
Newer builds of Samsung Galaxy Z Flip5 use bootloader binary 6 (latest: F731NKSU6HZIJ). If your device already runs binary 6, 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#.
MODEM/CP Version: F731NKSU5EYCA
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 F731NKSS5EYF1
- Install Samsung USB Drivers:Download Official Drivers
- Download Odin Flash Tool:
- F731NKSS5EYF1 has bootloader binary 5. Your device must run binary 5 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.
Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.
Frequently Asked Questions
F731NKSS5EYF1 is Android 15 firmware for Samsung Galaxy Z Flip5, released for South Korea (KOO, KTC, LUC, SKC). It includes the 2025-06-01 security patch. Samsung built it on 2025-06-16.
No. A newer build for SM-F731N is available: F731NKSU6HZIJ. Install it instead of F731NKSS5EYF1 unless you need this exact version. The previous build was F731NKSS5EYE2.
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 9.834 GiB; keep about twice that free on the computer to unzip it. The Samsung Galaxy Z Flip5 must be on bootloader binary 5 or lower.
This build uses bootloader binary 5. It can be flashed on a Samsung Galaxy Z Flip5 running binary 5 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 11 other builds of this model use the same binary, so you can switch between them in both directions.