One UI 8 Watch for Galaxy Watch 5 in Europe — DYK4 with October 2025 patch and new gestures
Samsung has begun rolling out One UI 8 Watch for the Galaxy Watch 5 (Wi‑Fi and LTE) in Europe: firmware DYK4 (~1.8 GB) brings improved security, new gestures and customization tools — important for those looking to extend their device's life without unnecessary expense.
By Oleg Bazylewicz
December 17, 2025 · 2 min read
Brief
According to SamMobile, Samsung is rolling out the One UI 8 Watch update for Galaxy Watch 5 models in Europe. The firmware carries version number DYK4, is about 1.8 GB, includes the October 2025 security patch, and is available for Wi‑Fi and LTE variants.
What's new
Briefly on the key changes — each aimed at convenience and security:
- Now Bar and new gestures, including Double Pinch for interacting with notifications;
- improved notification display and settings;
- new charging animations;
- watch face management by keywords and recommendations;
- ability to create personalized tiles;
- expanded calendar access within the app;
- sleep mode with recommendations and Mindfulness features;
- updated appearance of the apps menu.
"Firmware DYK4 brings both functional updates and the October 2025 security patch — an important step in supporting devices released in 2021"
— SamMobile
Technical details and how to install
The update is around 1.8 GB; installation can take more than 10 minutes. It is recommended to charge the watch to at least 50% before starting. The firmware can be installed manually via the Galaxy Wearable app: Watch settings → Software update → Download and install.
Context and significance
This update is an example of how manufacturers continue to support devices released several years ago. For users, it means better security, new personalization tools, and less need for urgent device replacement — a noticeable economic effect over the long term.
For Ukraine this has added significance: at times when equipment is used longer and data security is a priority, timely patches and interface updates preserve functionality without extra expense. It’s also worth noting that Samsung announced a presentation in Las Vegas on January 4 — the company continues to invest resources in its watch ecosystem, and support for 2021 models speaks to a responsible update policy.
Conclusion
The DYK4 update for the Galaxy Watch 5 is not sensational, but it’s an important step: it improves security and adds useful tools that increase the device’s value. If you use a Watch 5 — it’s worth installing the update soon; if you’re hesitating about buying a new watch, this is another argument in favor of extending the life of your current device.
