One UI 4.5 comes with Wear OS 3.5, improved dual SIM support for calls, and more

Samsung has so far only opened One UI beta programs for its Galaxy phones and tablets. This changed last week when it announced a One UI Watch beta for the Galaxy Watch4.

What's new in the One UI 4.5 beta update? The One UI 4.5 update for the Galaxy Watch4 is shaping up to be a significant update, with plenty of new changes and features (via r/GalaxyWatch4).

This includes new duo edge/box complications, an upgraded watch screen, new watch faces, a unified composer with draft support when replying to notifications, support for additional fields while displaying notifications, and more.

One UI 4.5 for the Galaxy Watch will be based on Wear OS 3.5, a minor bump from version 3.2 that the smartwatch is currently running.

The firmware also brings dual SIM support, so you'll get an option to select your preferred SIM when making a call from the wearable. The Galaxy Watch currently uses the first added line for placing calls.

The One UI 4.5 beta is only live in the US and South Korea for now, with the VE7 firmware coming in as a hefty 796MB download. The program is also solely available to Samsung smartphone users and for the Bluetooth-only versions of the Watch4 and Watch4 Classic.

Unfortunately, there is no way to cut the line, and you'll have to be lucky enough to be approved for the beta program by Samsung, but this is your best chance at getting an early glimpse of the new One UI Watch release.