https://wccftech.com/download-final-version-of-watchos-4-2-on-apple-watch-heres-how/

The full and final version of watchOS 4.2 for Apple Watch has been released for download. Here’s what is new and how to download.

Unlike iOS, full and final watchOS updates arrive very occasionally. But when they do, a lot of fixes come along with them, and watchOS 4.2 is no different at all. Apart from fixing bugs, performance has been improved by a certain margin too. The complete changelog of the update is as follows, so you can see for yourself what Apple has packed into this update.