Update details and purpose
Huawei is delivering a new HarmonyOS update for global Watch 4 Pro owners aimed at improving overall stability and resolving known issues. The firmware arrives as build HarmonyOS 4.3.0.617 and the installation package is 425MB.
What changes to expect
The release notes describe optimizations to system stability, targeted improvements for certain usage scenarios, general troubleshooting for existing problems, and security and background optimizations. These changes are presented as enhancements to the watch’s performance and reliability rather than new feature additions.
Rollout and installation guidance
The update is being distributed in a phased rollout and may not be immediately available to all devices. Huawei recommends ensuring the Watch 4 Pro has at least 20% battery before installing the update.
Key takeaway
Huawei has started rolling out a May 2026 stability update for the global Watch 4 Pro, improving system reliability and addressing specific usage issues. The firmware, identified as HarmonyOS 4.3.0.
Context
The update arrives amid a broader period of new product announcements from Huawei, which recently introduced several devices at a Bangkok global launch. Huawei also noted strong overseas demand for its wearables, with the Watch FIT series reported to have reached 24 million units in sales.