Galaxy Watch3 41mm

Samsung Galaxy Watch3 41mm SM-R855F firmware

The latest firmware for Samsung Galaxy Watch3 41mm (SM-R855F) is R855FXXU1FWK2, released on December 21, 2023 for 35 regions (CSC). Every official firmware build for SM-R855F, newest first: one row per build with all regions (CSC) that received it.

Latest build
R855FXXU1FWK2 2 years ago
Builds
23 builds
Regions (CSC)
40 regions

Firmware builds for SM-R855F

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/R855FXXU1FWK2

SM-R855F update history

The newest build, R855FXXU1FWK2, was released on December 21, 2023. No new build has appeared for 35 months, so regular updates for this model have most likely ended.

Device specifications

Display diagonal
3.05 cm (1.2")
Display technology
OLED
Display resolution
360 x 360 pixels
Processor frequency
1150 MHz
RAM
1024 MB
Flash memory
8 GB
Battery capacity
247 mAh
Weight
48.2 g
Band material
Leather
Band colour
Black

Changelog for SM-R855F

• Watch faces
2 new types of new Watch faces.
(Stretched Time, Perpetual)
• Stability and reliability
The stability for sensors has been improved.

• Watch Face
Enjoy new and improved watch faces with enriched style and customizable options.
- Two new Watch Faces have been added.
  (Pro analog, Gradient number)
• Samsung Health
- Through the updated 'Daily Activity Indicator', Mobile Health data is synchronized to improve convenience.
- Provides a recording function when snoring is detected, using your mobile phone while you sleep.

• GPS
The stability has been improved.

• Watch faces
- Support the new Watchfaces
• Exercise
- Support Group Challenge Widget in watch
- Provide more accurate calorie consumption levels based on HR (Except swimming)
• Detect falls
- More falls will be detected, but other activity may also be detected as falls.
• Calendar
- Increase the calendar synchronization period from 3 months to 1 year

• Enhanced the auto walking/running icons
• Enhanced the 'Inactive time alerts' icon
• Device stability improvements, bug fixes.

The Blood Pressure app and/or ECG app in the Samsung Health Monitor is available in countries where a regulatory clearance, approval or certificate for each app has been obtained.
We expect that the number of countries where the Samsung Health Monitor to be available will continuously increase in the order of securing an appropriate regulatory clearance, approval or c...

Show 12 older builds

• Improved WiFi stability  
• Improved system stability and reliability

• The security of your device has been improved.

• Improved Samsung Health Function
- You can now enjoy a group-walking challenge with your friends
- Reduced auto workout recognition time (running, rowing machine, elliptical)
- Enjoy home workout with a variety of fitness programs
• SmartThings Find
- You can find the location of the watch on the map.
• Hand Wash
- After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
• Improved system stability and reliability

• Improved Samsung Health Function
- You can now enjoy a group-walking challenge with your friends
- Reduced auto workout recognition time (running, rowing machine, elliptical)
- Enjoy home workout with a variety of fitness programs
• SmartThings Find
- You can find the location of the watch on the map.
• Hand Wash
- After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
• Blood oxygen
- Inform how effectively your blood is carr...

• Improved Samsung Health Function
- You can now enjoy a group-walking challenge with your friends
- Reduced auto workout recognition time (running, rowing machine, elliptical)
- Enjoy home workout with a variety of fitness programs
• SmartThings Find
- You can find the location of the watch on the map.
• Hand Wash
- After downloading the Hand Wash app, your watch can automatically detect and time, when you start washing your hands
• Improved system stability and reliability

The Blood Pres...

• Voice guidance provided via headset connected to mobile when exercising with a watch.
• Voice guidance provided for traveled distance and HR data, when Auto Lap feature is enabled during Running/Cycling.
• Improved Blood Oxygen measurement
• Improved system stability and reliability

※ After updating the Samsung Health App and check the new features below.
- Blood Oxygen : Check how effectively your blood is carrying oxygen.
  * Not Available Countries : Algeria, Angola, Canada, France, Iran, Japan, Libya, South Africa, Thailand
- Advanced Running Analysis : Giving you the insights you need to improve your running form.
- VO2max : Check the maximum amount of oxygen you utilize during exercise to improve your endurance.
- Sleep score : Check out sleep scores, a new way to u...

• Added new stress tracker on the Samsung Health app.

※ After updating the Samsung Health App and check the new features below.
- Blood Oxygen : Check how effectively your blood is carrying oxygen.
  * Not Available Countries : Algeria, Angola, Canada, France, Iran, Japan, Libya, South Africa, Thailand
- Advanced Running Analysis : Giving you the insights you need to improve your running form.
- VO2max : Check the maximum amount of oxygen you utilize during exercise to improve your endurance.
- Sleep score : Check out sleep scores, a new way to u...

※ After updating the Samsung Health App and check the new features below.
- Blood Oxygen : Check how effectively your respiratory system transfers oxygen to the blood stream.
  * Not Available Countries : Algeria, Angola, Canada, France, Iran, Japan, Libya, South Africa, Thailand
- Advanced Running Analysis : Giving you the insights you need to improve your running form.
- VO2max : Check the maximum amount of oxygen you utilize during exercise to improve your endurance
- Sleep score : Check ou...

1 retail code (SKU)

Box codes of SM-R855F for different colors and markets. Firmware is chosen by the model code SM-R855F and your region (CSC), not by the SKU.

  • SM-R855FZSAEUB

New firmware for other devices

All latest builds

Similar Models

Frequently Asked Questions

When did SM-R855F get its last update?

The latest build for SM-R855F, R855FXXU1FWK2, was released on December 21, 2023 (2 years ago).

How often does SM-R855F get updates?

SM-R855F has had no new firmware for 35 months, so regular updates have most likely ended.

Is the firmware for SM-R855F official?

Yes, all firmware files for SM-R855F are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-R855F using Odin?

To flash SM-R855F, 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-R855F?

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-R855F.

Is this the stock ROM or flash file for SM-R855F?

Yes. Every build on this page is the official stock ROM for SM-R855F 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-R855F?

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.