SM-L705N 1 country Android 16

Samsung Galaxy Watch Ultra L705NKOU1BYFE Firmware

Name: Samsung Galaxy Watch Ultra (SM-L705N)
Brand: Samsung
Availability: InStock

Samsung Galaxy Watch Ultra L705NKOU1BYFE is an Android 16 firmware for South Korea (KOO, 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 L705NKOU1AYCD: Android updated from Android 14 to Android 16. A newer build for SM-L705N is available: L705NKOS3BZF4.

9.3/10 (32)350 times

Android 16

OS Version

2025-07-26

First release

other regions until 2025-08-06

n/a

Security patch

Countries

CSC codes

Bootloader binary

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

Newer builds of Samsung Galaxy Watch Ultra use bootloader binary 3 (latest: L705NKOS3BZF4). If your device already runs binary 3, this build cannot be flashed.

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: L705NKOU1BYFE

Model	Region	CSC Version	Build Date	Size	File name	Download
SM-L705N	KOO South Korea	L705NOKO1BYFE	2025-08-06	3.614 GiB	SM-L705N_1_20250806140820_2ae5naanpa_fac.zip
SM-L705N	SKC South Korea	L705NOKA1BYFE	2025-07-26	3.625 GiB	SM-L705N_1_20250726082811_f12cqc9bqb_fac.zip

Device specifications

Launched withWear OS
Display diagonal3.81 cm (1.5")
Display technologyAMOLED
Display resolution480 x 480 pixels
RAM2000 MB
Flash memory64 GB
Battery capacity590 mAh
Weight60.5 g
Band materialTitanium
Band colourBlue
Band sizeOne Size

Specifications of SM-L705F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

How to flash L705NKOU1BYFE

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

L705NKOU1BYFE 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.

Frequently Asked Questions

L705NKOU1BYFE is Android 16 firmware for Samsung Galaxy Watch Ultra, released for South Korea (KOO, SKC). Samsung built it on 2025-07-26.

No. A newer build for SM-L705N is available: L705NKOS3BZF4. Install it instead of L705NKOU1BYFE unless you need this exact version. The previous build was L705NKOU1AYCD.

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 Watch Ultra must be on bootloader binary 1 or lower.

This build uses bootloader binary 1. It can be flashed on a Samsung Galaxy Watch Ultra running binary 1 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 5 other builds of this model use the same binary, so you can switch between them in both directions.