SM-R915N 3 countries Android 16

Samsung Galaxy Watch5 R915NKOU2DZB6 Firmware

Name: Samsung Galaxy Watch5 (SM-R915N)
Brand: Samsung
Availability: InStock

Samsung Galaxy Watch5 R915NKOU2DZB6 is an Android 16 firmware for LUO, SKO, South Korea (KOO, KTC, KTO, 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 R915NKOU1DYL6 https://samfirm.shop/build/R915NKOU1DYL6: bootloader binary raised from 1 to 2, so after installing it there is no way back to older builds. A newer build for SM-R915N is available: R915NKOS2DZG3 https://samfirm.shop/build/R915NKOS2DZG3.

8.9/10 (26)1,432 times

Android 16

OS Version

2026-03-17

Build Date

n/a

Security patch

Countries

CSC codes

Bootloader binary

Bootloader binary 2. 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: R915NKOU2DZB6

Model	Region	CSC Version	Size	File name	Download
SM-R915N	KOO South Korea	R915NOKO2DZB6	3.266 GiB	SM-R915N_4_20260317104820_ez9z7q2epn_fac.zip
SM-R915N	KTC, KTO, LUC, SKC South Korea LUO, SKO	R915NOKA2DZB6	3.277 GiB	SM-R915N_4_20260317104800_yal78lox9c_fac.zip

Device specifications

Launched withWear OS
Display diagonal3.56 cm (1.4")
Display technologyOLED
Display resolution450 x 450 pixels
RAM1500 MB
Flash memory16 GB
Battery capacity410 mAh
Weight33.5 g
Waterproof up to50 m
Band colourGraphite

Specifications of SM-R915F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

How to flash R915NKOU2DZB6

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

R915NKOU2DZB6 has bootloader binary 2. Your device must run binary 2 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

R915NKOU2DZB6 is Android 16 firmware for Samsung Galaxy Watch5, released for LUO, SKO, South Korea (KOO, KTC, KTO, LUC, SKC). Samsung built it on 2026-03-17.

No. A newer build for SM-R915N is available: R915NKOS2DZG3. Install it instead of R915NKOU2DZB6 unless you need this exact version. The previous build was R915NKOU1DYL6.

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 Watch5 must be on bootloader binary 2 or lower.

This build uses bootloader binary 2. It can be flashed on a Samsung Galaxy Watch5 running binary 2 or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". 2 other builds of this model use the same binary, so you can switch between them in both directions.