Galaxy Watch9

Samsung Galaxy Watch9 SM-L355F firmware

The latest firmware for Samsung Galaxy Watch9 (SM-L355F) is L355FXXS1AZH4 with Android 17, released on September 3, 2026 for 46 regions (CSC). Every official firmware build for SM-L355F, newest first: one row per build with all regions (CSC) that received it.

Latest build
L355FXXS1AZH4 Android 17 · 2 months ago
Builds
3 builds
Regions (CSC)
46 regions

Firmware builds for SM-L355F

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/L355FXXS1AZH4

SM-L355F update history

All 3 builds in our database run Android 17. The newest build, L355FXXS1AZH4, was released on September 3, 2026 with the August 2026 security patch. That patch (SMR Aug-2026) fixes 54 vulnerabilities, 8 of them critical. Updates have become rare: SM-L355F received 3 builds over the last 12 months, in 3 different months.

Device specifications

Launched with
Wear OS
Display diagonal
3.81 cm (1.5")
Display technology
AMOLED
Display resolution
480 x 480 pixels
RAM
2 MB
Battery capacity
445 mAh
Weight
34 g
Band colour
Green

Changelog for SM-L355F

• Security
The device is protected with improved security.

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

• Stability and reliability
Device behavior has been improved.

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

1 retail code (SKU)

Box codes of SM-L355F for different colors and markets. Firmware is chosen by the model code SM-L355F and your region (CSC), not by the SKU.

  • SM-L355FZSAEUB

New firmware for other devices

All latest builds

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-L355F?

The newest firmware for SM-L355F runs Android 17: build L355FXXS1AZH4, released on September 3, 2026.

When did SM-L355F get its last update?

The latest build for SM-L355F, L355FXXS1AZH4, was released on September 3, 2026 (2 months ago).

How often does SM-L355F get updates?

Over the last 12 months SM-L355F received 3 builds, with at least one new build in 3 different months.

Is the firmware for SM-L355F official?

Yes, all firmware files for SM-L355F are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-L355F using Odin?

To flash SM-L355F, 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-L355F?

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-L355F.

Is this the stock ROM or flash file for SM-L355F?

Yes. Every build on this page is the official stock ROM for SM-L355F from Samsung's update server, the same package other sites call the flash file or the software update. It installs with Odin on a Windows PC.

Does flashing firmware remove the FRP lock on SM-L355F?

No. Factory Reset Protection is tied to the Google account that was on the phone and survives a firmware flash. Sign in with that account or use the legal options in our FRP guide.