Samsung Galaxy Watch Active2 44mm R820XXU1CTH8 Firmware
Samsung Galaxy Watch Active2 44mm R820XXU1CTH8 is an Tizen 5.5.0.1 firmware for 4 countries, 5 CSC codes. It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build R820XXU1BTG1: Android updated from Tizen 4.0.0.8 to Tizen 5.5.0.1. A newer build for SM-R820 is available: R820XXU1FWK2.
Bootloader binary 1. Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.
All regional downloads
Pick your region (CSC) to download the matching firmware package.
No matching downloads
Device specifications
- Display diagonal3.43 cm (1.35")
- Display technologyOLED
- Display resolution360 x 360 pixels
- Processor frequency1150 MHz
- RAM750 MB
- Flash memory4 GB
- Battery capacity340 mAh
- Weight30 g
- Band materialFluoroelastomer
- Band colourBlack
What's new in R820XXU1CTH8
- 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.
How to flash R820XXU1CTH8
- Install Samsung USB Drivers:Download Official Drivers
- Download Odin Flash Tool:
- R820XXU1CTH8 has bootloader binary 1. Your device must run binary 1 or lower: it is the 5th character from the end of your current build number.
- CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
- HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
- The Download Mode key combo depends on the model: see all combos.
Frequently Asked Questions
Other builds and changelog for Samsung Galaxy Watch Active2 44mm
• 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.
• 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
Show 15 older builds
• Enhanced the auto walking/running icons
• Enhanced the 'Inactive Alert' icon
• Improved device stability
• Improved Messaging App stability
• Improved WiFi stability
• Improved system stability and reliability
• 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 syste...
• 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...
• 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
- 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 : Suppor...
- 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 : Suppor...
• Bug fix for random disabling of Always On Mode.
• Improved accuracy of calorie measurement based on heart rate sensor.
• Improved stability for Bixby features.