This update includes improvements to functions as listed below.
The exact changes may differ depending on your device model, country, and service provider.
To get the best from your device, please keep your device up to date and regularly check for software updates.

Galaxy Watch Active2 (SM-R820)


Build Number : R820XXU1DUE3
Tizen version : Tizen 5.5.0.2
Release Date : 2021-05-27
• Enhanced the auto walking/running icons
• Enhanced the 'Inactive Alert' icon
• Improved device stability

Build Number : R820XXU1DUD1
Tizen version : Tizen 5.5.0.2
Release Date : 2021-04-29
• Improved Messaging App stability  
• Improved WiFi stability  
• Improved system stability and reliability

Build Number : R820XXU1DUA3
Tizen version : Tizen 5.5.0.2
Release Date : 2021-01-15
• Improved Samsung Health Function
- You can now enjoy a group-walking challenge with your friends.
- Additional sleep score insight provided.
- 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

Build Number : R820XXU1CTJ5
Tizen version : Tizen 5.5.0.1
Release Date : 2020-10-28
• If exercising with a watch, the voice guide is provided via a headset connected to the mobile device.
• Add a voice guidance about cumulative data and heart rate to the Auto Lap of Running/Cycling.
• UX update (A second hand will not be shown on AOD screen.)
• Improved system stability and reliability

Build Number : R820XXU1CTI4
Tizen version : Tizen 5.5.0.1
Release Date : 2020-09-29
• Improved GPS accuracy and connection
• Improved system stability and reliability

Build Number : R820XXU1CTH8
Tizen version : Tizen 5.5.0.1
Release Date : 2020-09-23
- 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.
- Detect falls : Watch can send out SOS call and messages to emergency contact when a hard fall is detected.
- Enhanced Notification : Upon receiving a message notification, a chat window appears and can also view images.
- AR Emoji/Bitmoji : Send AR Emoji and Bitmoji through the watch.
- Capture : Supports scroll capture feature that automatically sends the screen-capture image to the phone.

Build Number : R820XXU1BTG1
Tizen version : Tizen 4.0.0.8
Release Date : 2020-08-04
• Improved system stability and reliability

Build Number : R820XXU1BTF3
Tizen version : Tizen 4.0.0.8
Release Date : 2020-07-14
• Improved system stability and reliability

Build Number : R820XXU1BTD3
Tizen version : Tizen 4.0.0.7
Release Date : 2020-04-14
• Improved system stability and reliability

Build Number : R820XXU1BTA1
Tizen version : Tizen 4.0.0.7
Release Date : 2020-01-09
• Improved system reliability

Build Number : R820XXU1BSK4
Tizen version : Tizen 4.0.0.7
Release Date : 2019-11-22
• Bug fix for random disabling of Always On Mode.
• Improved accuracy of calorie measurement based on heart rate sensor.
• Improved stability for Bixby features.

Build Number : R820XXU1BSJ6
Tizen version : Tizen 4.0.0.7
Release Date : 2019-10-18
· Fixed screen flickering bug when screen returning to Watch Always On mode.
· Improved language support for Watch's Samsung Health features.

Build Number : R820XXU1BSI9
Tizen version : Tizen 4.0.0.7
Release Date : 2019-09-27
· Bug fix for GPS.
· Touch bezel setting turned on by default.
· Improved performance of GPS.

Build Number : R820XXU1ASHF
Tizen version : Tizen 4.0.0.6
Release Date : 2019-09-06
· Improved system reliability