Download Samsung Firmware SM-L345U

Samsung Watch9 40mm

The latest firmware for Samsung Watch9 40mm (SM-L345U) is L345USQS1AZH4 with Android 17, released on September 1, 2026 for 2 regions (CSC). Every official firmware build for SM-L345U, newest first: one row per build with all regions (CSC) that received it.

Latest build
L345USQS1AZH4 Android 17 · 1 month ago
Builds
2 builds
Regions (CSC)
2 regions

Firmware builds for SM-L345U

Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/L345USQS1AZH4

SM-L345U update history

All 2 builds in our database run Android 17. The newest build, L345USQS1AZH4, was released on September 1, 2026 with the August 2026 security patch. That patch (SMR Aug-2026) fixes 54 vulnerabilities, 8 of them critical. Updates have become rare: SM-L345U received 2 builds over the last 12 months, in 2 different months.

Device specifications

Launched with
Wear OS
Display diagonal
3.3 cm (1.3")
Display technology
AMOLED
Display resolution
438 x 438 pixels
RAM
2 MB
Battery capacity
390 mAh
Weight
31.5 g
Band colour
Graphite

Specifications of SM-L345F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

Changelog for SM-L345U

• Security
The device is protected with improved security.

These changes may vary depending on the model, country, or network operator of the customer environment.

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-L345U?

The newest firmware for SM-L345U runs Android 17: build L345USQS1AZH4, released on September 1, 2026.

When did SM-L345U get its last update?

The latest build for SM-L345U, L345USQS1AZH4, was released on September 1, 2026 (1 month ago).

How often does SM-L345U get updates?

Over the last 12 months SM-L345U received 2 builds, with at least one new build in 2 different months.

Is the firmware for SM-L345U official?

Yes, all firmware files for SM-L345U are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-L345U using Odin?

To flash SM-L345U, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.

Can I downgrade the Android version on SM-L345U?

Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-L345U.