Galaxy Watch FE

Samsung Galaxy Watch FE SM-R861 firmware

The latest firmware for Samsung Galaxy Watch FE (SM-R861) is R861XXS2CZG3 with Android 16, released on August 24, 2026 for 69 regions (CSC). Every official firmware build for SM-R861, newest first: one row per build with all regions (CSC) that received it.

Latest build
R861XXS2CZG3 Android 16 · 2 months ago
Builds
13 builds
Regions (CSC)
69 regions

Firmware builds for SM-R861

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/R861XXS2CZG3

SM-R861 update history

SM-R861 started on Android 13 and has received 2 major Android upgrades; it now runs Android 16. The newest build, R861XXS2CZG3, was released on August 24, 2026 with the August 2026 security patch. That patch (SMR Aug-2026) fixes 54 vulnerabilities, 8 of them critical. Over the last 12 months SM-R861 received 5 builds, spread over 5 different months.

Device specifications

Launched with
Wear OS
Display diagonal
3.05 cm (1.2")
Display technology
AMOLED
Display resolution
396 x 396 pixels
Processor frequency
1180 MHz
RAM
1500 MB
Flash memory
16 GB
Battery capacity
247 mAh
Weight
26.6 g
Waterproof up to
50 m
Band colour
Blue

Changelog for SM-R861

• 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.
• Security
The device is protected with improved security.

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

• Security
The device is protected with improved security.

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

One UI 8 Watch Upgrade
Get things done

Stay on top of important tasks with the Now bar
Check the information you need right now and start essential features straight from your watch face. Ongoing tasks will appear in the Now bar at the bottom of your watch face so you can check key information quickly.

Do more with double pinch
Just pinch your thumb and index finger together twice to scroll through notifications, control music, take pictures, and more. You can also customize what happens wh...

• Stability and reliability
Device behavior has been improved.

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

Show 5 older builds

• Security
The device is protected with improved security.

• Stability and reliability
The stability has been improved.
• Security
The device is protected with improved security.

One UI 6 Watch Upgrade
A new look for your watch

Discover new watch faces
Express your individual style with these new premium watch faces. Spatial Number provides an analog clock on top of large bold digits. Simple Digital is for people who prefer a minimalist design. Ultra Info Board lets you quickly check your workout information. You can find these watch faces in the new featured watch faces section of the Galaxy Wearable app. You can also browse watch faces by keyword including colors,...

• Stability and reliability
The stability has been improved.

1 retail code (SKU)

Box codes of SM-R861 for different colors and markets. Firmware is chosen by the model code SM-R861 and your region (CSC), not by the SKU.

  • SM-R861NZSADBT

New firmware for other devices

All latest builds

Similar Models

Frequently Asked Questions

What is the latest Android version for SM-R861?

The newest firmware for SM-R861 runs Android 16: build R861XXS2CZG3, released on August 24, 2026.

When did SM-R861 get its last update?

The latest build for SM-R861, R861XXS2CZG3, was released on August 24, 2026 (2 months ago).

How often does SM-R861 get updates?

Over the last 12 months SM-R861 received 5 builds, with at least one new build in 5 different months.

Is the firmware for SM-R861 official?

Yes, all firmware files for SM-R861 are 100% official, original, and obtained directly from Samsung servers.

How to flash Samsung SM-R861 using Odin?

To flash SM-R861, 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-R861?

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-R861.

Is this the stock ROM or flash file for SM-R861?

Yes. Every build on this page is the official stock ROM for SM-R861 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-R861?

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.