The story so far…

As is tradition, Apple revealed its new Apple Watch software at its annual WWDC conference, this year’s smartwatchupdate being watchOS 5. It also made the update immediately available to developers in beta.

Unlike iOS 12 on iPhone, which you can now download in public beta (beware if you do: there are bugs), watchOS 5 isn’t available for everyone. You’ll need a developer account, or access to one, if you want it early. And even if you do install it, you can’t revert back to the previous software without taking it into an Apple Store. You’ve been warned.
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Read full post here:
https://www.wareable.com/apple/apple-watch-super-guide-the-missing-manual-001