Apple today seeded the second beta of an upcoming watchOS 4.2 update to developers for testing purposes, one week after releasing the first watchOS 4.2 beta and a little under a week after releasing the watchOS 4.1 update.
Once the proper configuration profile has been installed from the Apple Developer Center, the new watchOS 4.2 beta can be downloaded through the dedicated Apple Watch app on the iPhone by going to General --> Software update.
To install the update, the Apple Watch needs to have at least 50 percent battery, it must be placed on the charger, and it has to be in range of the iPhone.
watchOS 4.2 appears to focus primarily on under-the-hood bug fixes and security updates. No major outward-facing changes were found in the first beta, but should new features be found in the second beta, we'll update this post.