Samsung Watch8 40mm (SM-L325U) Firmware Overview
What is the latest SM-L325U firmware?
L325USQS3AZF4, released July 9, 2026 with Android 16. It is a security update on bootloader binary 3. The archive holds 7 official builds across 1 region (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 July 2026.
Can I downgrade the SM-L325U 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 Jun 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-L325U firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
L325USQS3AZF4
Security update
|
3 | XAA | 16 |
2026-07-09 | Download |
|
L325USQS3AZE1
Security update
|
3 | XAA | 16 |
2026-06-03 | Download |
|
L325USQU2AYK1
Feature update
|
2 | XAA | 16 |
2025-12-02 | Download |
|
L325USQS1AYH6
Security update
|
1 | XAA | 16 |
2025-08-21 | Download |
|
L325USQU1AYG4
Feature update
|
1 | XAA | 16 |
2025-08-12 | Download |
|
L325USQU1AYFE
Feature update
|
1 | XAA | 16 |
2025-07-16 | Download |
|
L325USQU3AZB4
Feature update
|
3 | XAA | — |
N/A | Download |
How to Flash SM-L325U 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.