Samsung Watch8 40mm (SM-L325N) Firmware Overview
What is the latest SM-L325N firmware?
L325NKOU3BZJ7, released November 6, 2026 with Android 17. It is a feature update on bootloader binary 3. The archive holds 20 official builds across 4 regions (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Watch8 40mm still getting updates?
Yes. The newest build is from November 2026, and 4 of 4 regions already have a build from that month; the rest usually follow within a few weeks.
Which Android versions did it get?
The SM-L325N builds in the archive run Android 16 to 17. The earliest build we have for each version:
- Android 17: L325NKOU3BZJ7 (Nov 2026), 4 builds in total
- Android 16: L325NKOS1AYH6 (Aug 2025), 16 builds in total
Can I downgrade the SM-L325N firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 3:
- Binary 3 — since Feb 2026
- Binary 2 — since Nov 2025
- Binary 1 — since Aug 2025
A phone already on binary 3 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 3 build. How to read a build number.
All SM-L325N firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
L325NKOU3BZJ7
Feature update
|
3 | SKC | 17 |
2026-11-06 | Download |
|
L325NKOU3BZJ7
Feature update
|
3 | KTC | 17 |
2026-11-06 | Download |
|
L325NKOU3BZJ7
Feature update
|
3 | LUC | 17 |
2026-11-06 | Download |
|
L325NKOU3BZJ7
Feature update
|
3 | KOO | 17 |
2026-11-06 | Download |
|
L325NKOS3AZF4
Security update
|
3 | KTC | 16 |
2026-07-08 | Download |
|
L325NKOS3AZF4
Security update
|
3 | LUC | 16 |
2026-07-08 | Download |
|
L325NKOS3AZF4
Security update
|
3 | KOO | 16 |
2026-07-08 | Download |
|
L325NKOS3AZF4
Security update
|
3 | SKC | 16 |
2026-07-08 | Download |
|
L325NKOS3AZE1
Security update
|
3 | KTC | 16 |
2026-06-11 | Download |
|
L325NKOS3AZE1
Security update
|
3 | KOO | 16 |
2026-06-11 | Download |
|
L325NKOS3AZE1
Security update
|
3 | LUC | 16 |
2026-06-11 | Download |
|
L325NKOS3AZE1
Security update
|
3 | SKC | 16 |
2026-06-11 | Download |
|
L325NKOU3AZB2
Feature update
|
3 | KTC | 16 |
2026-02-26 | Download |
|
L325NKOU3AZB2
Feature update
|
3 | KOO | 16 |
2026-02-26 | Download |
|
L325NKOU3AZB2
Feature update
|
3 | LUC | 16 |
2026-02-26 | Download |
|
L325NKOU2AYK1
Feature update
|
2 | KTC | 16 |
2025-11-27 | Download |
|
L325NKOU2AYK1
Feature update
|
2 | KOO | 16 |
2025-11-27 | Download |
|
L325NKOU2AYK1
Feature update
|
2 | LUC | 16 |
2025-11-27 | Download |
|
L325NKOU2AYK1
Feature update
|
2 | SKC | 16 |
2025-11-27 | Download |
|
L325NKOS1AYH6
Security update
|
1 | SKC | 16 |
2025-08-21 | Download |
Latest SM-L325N Firmware by Region
The newest build for each region (CSC) code. Not sure which region your phone uses? See the CSC code guide.
| Region | Latest build | Bit | Android | Date |
|---|---|---|---|---|
| KOO | L325NKOU3BZJ7 | 3 | 17 | 2026-11-06 |
| KTC | L325NKOU3BZJ7 | 3 | 17 | 2026-11-06 |
| LUC | L325NKOU3BZJ7 | 3 | 17 | 2026-11-06 |
| SKC | L325NKOU3BZJ7 | 3 | 17 | 2026-11-06 |
How to Flash SM-L325N Firmware
Put the Samsung Watch8 40mm into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 3 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.