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).
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.