Samsung has released a new firmware update for the Galaxy Watch 4 & Watch 4 Classic, bringing system stability improvements and the latest security enhancements. The new February 2026 update with the R390XXU2JZC2 firmware version is currently rolling out to users in South Korea with a 259MB file size. The latest update finally fixes major issues like battery drain, charging problems, and notification delays reported by users.
Galaxy Watch 4 March 2026 Update Details
After the major One UI 8 Watch update, Samsung is continuously sending new firmware patches to the Galaxy Watch 4 series, and this monthly patch is one of them. Although it carries the February 2026 security patch, the build is part of the March rollout. It has been released to fix some errors and other issues that users found in the previous update.
Solved Major Software Issues
In a recent update, users had complained about notification delays, charging issues, battery drain, and failed connections with the Galaxy Wearable app. It is expected to resolve all these user concerns in the March update.
Although Samsung hasn’t shared a detailed changelog, the Galaxy Watch 4 March update appears to further focus on app optimizations and minor bug fixes to improve overall performance by addressing the above-mentioned problems.
Galaxy Watch 4 Changelog
Firmware Version: R390XXU2JZC2
Update Size: ~259MB
Security Level: February 5, 2026
OS: One UI 8.0 Watch
Changes: Bug fixes, improved security
Region: South Korea (expanding soon)
Last Major One UI Watch Update
All the other new Galaxy Watch models, including the Galaxy Watch 5 series, received the February 2026 patch in the first week of March, and it has finally been released for the Watch 4 series. As Samsung mentioned before, One UI 8 Watch was the last major software update for the Galaxy Watch 4, and it will not get the next major version, nor will it be eligible to participate in the beta program.
How to Install a New Patch
The update is currently spotted in South Korea and will expand to other regions soon. Galaxy Watch 4 users can check for the update through the Galaxy Wearable app on their connected smartphone. Samsung continues to support the Galaxy Watch 4 with regular updates, and it will continue throughout this year.
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